Objective:To differentiate cryptic stage of Echinococcus granulosus(E.granulosus) and Taenia by PCR-RFLP and sequence information of amplicon.Methods:DNA were isolated from metacestodes stage of Taenia and E.granulosu...Objective:To differentiate cryptic stage of Echinococcus granulosus(E.granulosus) and Taenia by PCR-RFLP and sequence information of amplicon.Methods:DNA were isolated from metacestodes stage of Taenia and E.granulosus using DNA isolation kit(Q-BIOgene kit,USA), the amplified and purified DNA product was then cloned and sent for sequencing.The generating sequence information was used for amplicons identification.Results:Out of 112 faecal and environmental samples,16 exhibited positive result.The product size of amplicon positive for E.granulosus was 310 bp;whereas,for Taenia spp.sizes varied from 379 to 388 bp.Restriction pr of ile of actinⅡwith Csp61 also differed Taenia spp.and E.granulosus.Conclusions:The result of the study indicated that,the primers were useful to differentiate cryptic stage of the two genera which is yet to be reported earlier.展开更多
Objective:To assess the efficacy of triclabendazole(TCBZ) in porcine cysticercosis.Methods:Eighteen naturally infected cysticercotic pigs were divided into 3 groups of 6 individuals each.The first group was treated or...Objective:To assess the efficacy of triclabendazole(TCBZ) in porcine cysticercosis.Methods:Eighteen naturally infected cysticercotic pigs were divided into 3 groups of 6 individuals each.The first group was treated orally with TCBZ at a single dose of 30 mg/kg of body weight,the second group was treated orally with oxfendazole at a single dose of 30 mg/kg of body weight and the third group received a placebo(control group).All animals were kept under the same management conditions.The pigs were euthanized 17 wk post-treatment and the number of surviving cysts in muscles was assessed and compared between groups.Results:All pigs treated with oxfendazole had only degenerated cysts in their carcasses.In contrast,TCBZ had very little effect against the parasitic cysts.Cysts from pigs in the TCBZ group looked apparently normal after treatment.However,histological evaluation showed a mild to moderate degree of inflammation.Conclusions:TCBZ is not an efficacious drug against Taenia solium cysticercosis in swine using a single dose.展开更多
The efficacy of oxfendazole(OFZ) on Taenia hydatigena metacestodes, also called Cysticercus tenuicollis(C. tenuicollis), was studied in 648 raising pigs. This study was performed in Tumbes Department in Peru, an endem...The efficacy of oxfendazole(OFZ) on Taenia hydatigena metacestodes, also called Cysticercus tenuicollis(C. tenuicollis), was studied in 648 raising pigs. This study was performed in Tumbes Department in Peru, an endemic area for cysticercosis. Pigs were randomized in two groups; untreated group(n = 142) did not receive any treatment and treated group(n = 506) received OFZ treatment at a single dose of 30 mg/kg body weight.Six months after treatment, the pigs were necropsied. The prevalence of infection by C. tenuicollis among the pigs was 27.5%(39/142) and 2.0%(10/506) in untreated and treated groups, respectively. Untreated group was infested only with viable cysts, whereas treated group had no viable cysts. All the cysts found in treated group presented degeneration, with a thick membrane, and they contained milky fluid and fibrous tissue. A single dose of OFZ was effective against C. tenuicollis, thus providing an alternative drug for controlling this parasite in pigs.展开更多
Taenia spp.are flatworms of the class Cestoda,whose definitive hosts are humans and primates.Human infestation(taeniasis) results from the ingestion of raw meat contaminated with encysted larval tapeworms and is consi...Taenia spp.are flatworms of the class Cestoda,whose definitive hosts are humans and primates.Human infestation(taeniasis) results from the ingestion of raw meat contaminated with encysted larval tapeworms and is considered relatively harmless and mostly asymptomatic.Anemia is not recognized as a possible sign of taeniasis and taeniasis-induced hemorrhage is not described in medical books.Its therapy is based on anthelmintics such praziquantel,niclosamide or albendazole.Here we describe a case of acute ileal bleeding in an Italian man affected with both Taenia spp.infestation resistant to albendazole and Helicobacter pylori-associated duodenal ulcers.展开更多
Infection with tapeworms is a major problem in many parts of the world. Patients may be asymptomatic or have a significant morbidity depending on the species. Infection with Taenia species is sometimes found by expuls...Infection with tapeworms is a major problem in many parts of the world. Patients may be asymptomatic or have a significant morbidity depending on the species. Infection with Taenia species is sometimes found by expulsion of eggs or proglottids in stool. Species specific diagnosis of Taenia is difficult,but possible. We present a case of Taenia saginata incidentally discovered,and risk factors for transmission,diagnosis,symptoms,and treatment.展开更多
[ Objective ] In order to observe the morphological structure of Taenia solium and improve the dyeing method of Taenia solium. [ Method ] Taenia soli- um was stained by hematoxylin-eosin （HE） staining method and obs...[ Objective ] In order to observe the morphological structure of Taenia solium and improve the dyeing method of Taenia solium. [ Method ] Taenia soli- um was stained by hematoxylin-eosin （HE） staining method and observed under microscope. Taenia solium specimens with clear structure and bright color were made. [ Results] Male reproductive system and excretory system of Taenia solium segment could be observed under the optical microscope, structures of uterus and eggs in Taenia solium gravid proglottid could also be observed. [ Conclusion] Aiming at providing a reference for the identification of Taenia solium and the diagnosis of the tapeworm disease.展开更多
For decades, Taenia solium cysticercosis (TSC) has remained an important constraint for public health and economic well being of the predisposed communities. Despite the fact that the disease is easily preventable, hu...For decades, Taenia solium cysticercosis (TSC) has remained an important constraint for public health and economic well being of the predisposed communities. Despite the fact that the disease is easily preventable, humans remain foci for transmission. They harbour the mature form of the parasite (Taenia solium) which may be curable at this stage and also easily prevented from contaminating pig feeds and environment with eggs of the parasite to break the cycle. Researchers, knowledgeable communities and international organisations such as the World Health Organisation work hard to make the disease a history. Nevertheless, persistence of the disease in endemic regions such as sub Saharan Africa is kept on increasing. While TSC in human may serve as a silent killer as it can go unnoticed for years, the immanent social cultural settings and lifestyles of the communities in endemic areas form the main concern on the epidemiology of the disease. Unless lifestyles change in endemic regions, front line research might rarely find its way into applications in an area of huge societal and economic impact, the TSC epidemiology. Sincerely, transmission of TSC is favoured by poor sanitation and hygiene which is motivated by lifestyle and poverty. What is perhaps missing is the knowledge on “why is the communities involved ease indiscriminately while almost every member of the community in endemic areas knows that indiscriminate defecation may harm their health? What social drivers are behind this motive (bush defecation)? How best can the disease be controlled and monitored? This review recommends for developing and implementing an interdisciplinary OneHealth community-based control mechanism and monitoring (surveillance) programme as standpoints towards eliminating TSC in sub-Saharan Africa and the rest endemic regions.展开更多
Perch sweeper fish with scientific name Cobitis taenia is one of the Cobitidae family. Since this kind of fish lives in clean waters and in the high areas of Talar River, it can be an index on water implution. This su...Perch sweeper fish with scientific name Cobitis taenia is one of the Cobitidae family. Since this kind of fish lives in clean waters and in the high areas of Talar River, it can be an index on water implution. This survey on the diet of this specimen is done on two stations （Kaselian and Tajoon） and shallow and high areas of Talar River in Mazandaran （Southern part of Caspian sea） and the duration of this survey is from October 2008 till September 2009. We should mention that fishing was just done by electro-shocker with voltage 300 V. And this fish after fishing is fixation in 10% formalin solution. So 410 perch sweeper fish were examined and the average of relatively length of gut （RLG） was 17.35 cm. The index of vacated intestine （VI） was calculated 43.35% for all samples. From intense of diet points of view （GSI）, the most frequency of full intestines was considered in summer and spring. On the other hand, the smallness of relatively length of gut index （RLG 〈 1） shows that perch sweeper fish＇s diet manner is inclined to herbivority. In the examination of containing of digestive track, overally 10 kinds of foodstuff were known. Based on amount of this index, 2.67% Chironomidae is known as main bait in all sampling period.展开更多
<strong>Background:</strong> Small bowel obstruction (SBO) is a common gastrointestinal condition often warranting acute surgical intervention. In human, tapeworm species can cause a parasitic infection by...<strong>Background:</strong> Small bowel obstruction (SBO) is a common gastrointestinal condition often warranting acute surgical intervention. In human, tapeworm species can cause a parasitic infection by ingestion of raw or under cooked beef (<em>T. saginata</em>) or pork (<em>T. solium</em> and <em>T. asiatica</em>). Taeniasis usually presents with vague symptoms or mild abdominal pain and discomfort. The intestinal complications are not commonly mentioned in the literatures.<strong> Case presentation:</strong> We present 65-year-old Egyptian woman who lives in Oman, who is known to have type two diabetes mellitus and hypertension. She presented to Emergency department with abdominal pain and constipation for a period of three days. On examination, she was dehydrated with tachycardia (pulse rate: 110/minute) blood pressure of 100/60 mmHg and patient was afebrile. Abdominal examination revealed, mildly distended abdomen and tense, no guarding or rigidity no palpable mass, exaggerated bowel sound and rectum is empty on per rectal examination. Emergency laparotomy was performed with intra-operative findings of large foreign body impacted in the distal jejunum about 8 × 3 cm, cylinder in shape completely obliterating the lumen, distal loops was collapsed. <strong>Conclusion: </strong>Although Taeniasis is a very rare infection, index of suspicion such as a potential in the differential diagnosis as cause of an acute abdomen with unusual surgical complications should be considered. The diagnosis of these rare circumstances is usually made intraoperatively, and surgery is recommended only for the treatment of complications.展开更多
Background:Taeniasis and cysticercosis are two diseases caused by Taenia solium,a parasite transmitted between humans and pigs,leading to considerable economic loss and disabilities.Transmission of the parasite is lin...Background:Taeniasis and cysticercosis are two diseases caused by Taenia solium,a parasite transmitted between humans and pigs,leading to considerable economic loss and disabilities.Transmission of the parasite is linked to environmental and behavioural factors such as inadequate sanitation and hygiene,poor pig management,and consumption of infected pork.This study used implementation research method to design a health education intervention strategy for reducing T.solium infections in Burkina Faso,a country endemic for the parasite.Methods:Eighteen group discussions were conducted with 8-18 participants each in three villages.In addition,structured interviews were conducted among 4777 participants and 2244 pig owners,who were selected through cluster random sampling in 60 villages of three provinces of Burkina Faso.Both approaches assessed knowledge and practices related to T.solium.The information obtained was used to develop a community-adapted health education intervention strategy to control taeniasis and cysticercosis in Burkina Faso.Results:The group discussions revealed that participants had a poor quality of life due to the diseases as well as inadequate access to latrines,safe water,and healthcare services.In addition,it was found that pig production was an important economic activity,especially for women.Furthermore,financial and knowledge constraints were important limitations to improved pig management and latrine construction.The survey data also showed that open defecation and drinking unboiled water were common behaviours,enhanced by a lack of knowledge regarding the transmission of the parasite,perceived financial barriers to the implementation of control measures,lack of public sensitization,as well as a lack of self-efficacy towards control of the parasite.Nevertheless,the perceived financial benefits of controlling porcine cysticercosis could be emphasized by an education program that discourages open defecation and encourages drinking safe water.The final intervention strategy included a Participatory Hygiene and Sanitation Transformation(PHAST)approach,as well as a 52-min film and an accompanying comic booklet.Conclusions:The main problem in the study communities regarding the transmission of T.solium cysticercosis is the random disposal of human faeces,which can be contaminated with parasite eggs.Prevention of open defecation requires the building of latrines,which can be quite problematic in economically challenged settings.Providing the community with the skills to construct durable latrines using low-cost locally available materials would likely help to resolve this problem.Further studies are required to implement and evaluate the T.solium control strategy developed in this study.展开更多
Background Echinococcosis, coenurosis and cysticercosis are debilitating diseases which prevail in China. Immunological diagnosis of metacestodosis is important in disease control. The 8-kDa glycoproteins from taeniid...Background Echinococcosis, coenurosis and cysticercosis are debilitating diseases which prevail in China. Immunological diagnosis of metacestodosis is important in disease control. The 8-kDa glycoproteins from taeniid cestodes have successfully been used for diagnosis of human cysticercosis in immunological assays. The aim of the present study was to investigate genetic variations and phylogenetic relationships of the 8-kDa proteins for evaluating the possibility of utilizing these proteins as diagnostic antigens for other metacestode infections. Methods The genes and complementary DNAs （cDNAs） encoding the 8-kDa proteins from Echinococcus （E.） granulosus, Taenia （T.） multiceps and T. hydatigena were amplified using PCR method. Their amplicons were cloned into the vector pMD18 and the positive clones were sequenced. Sequence data were analyzed with the SeqMan program, and sequence homology searches were performed using the BLAST program. Alignments were conducted using the ClustalX program, and the phylogenetic analyses were performed with the Protein Sequences Program and the Puzzle Program using the Neighbor-joining method. Results Fifteen, 18 and 22 different genomic DNA sequences were identified as members of the 8-kDa protein gene family from E. granulosus, T. multiceps and T. hydatigena, respectively. Eight, four and six different cDNA clones respectively from E. granulosus, T. multiceps and T. hydatigena were characterized. Analysis of these sequences revealed 54 unique 8-kDa protein sequences. Phylogenetic trees demonstrated that the taeniid 8-kDa proteins are clustered into eight clades at least： Ts18, Ts14, TsRS1, TsRS2, T8kDa-1, T8kDa-2, T8kDa-3 and T8kDa-4. Conclusion We found that the gene family encoding for the taeniid 8-kDa antigens is comprised of many members with high diversity, which will provide molecular evidence for cross-reaction or specific reaction among metacestode infections and may contribute to the development of promising immunological methods for diagnosis of metacestodosis.展开更多
Background:The frequency of Taenia solium,a zoonotic helminth,is increasing in many countries of sub-Saharan Africa,where the prevalence of the human immunodeficiency virus(HIV)is also high.However,little is known abo...Background:The frequency of Taenia solium,a zoonotic helminth,is increasing in many countries of sub-Saharan Africa,where the prevalence of the human immunodeficiency virus(HIV)is also high.However,little is known about how these two infections interact.The aim of this study was to compare the proportion of HIV positive(+)and negative(−)individuals who are infected with Taenia solium(TSOL)and who present with clinical and neurological manifestations of cysticercosis(CC).Methods:In northern Tanzania,170 HIV+individuals and 170 HIV–controls matched for gender,age and village of origin were recruited.HIV staging and serological tests for TSOL antibodies(Ab)and antigen(Ag)were performed.Neurocysticercosis(NCC)was determined by computed tomography(CT)using standard diagnostic criteria.Neurological manifestations were confirmed by a standard neurological examination.In addition,demographic,clinical and neuroimaging data were collected.Further,CD4^(+)cell counts as well as information on highly active antiretroviral treatment(HAART)were noted.Results:No significant differences between HIV+and HIV–individuals regarding the sero-prevalence of taeniosis-Ab(0.6%vs 1.2%),CC-Ab(2.4%vs 2.4%)and CC-Ag(0.6%vs 0.0%)were detected.A total of six NCC cases(3 HIV+and 3 HIV–)were detected in the group of matched participants.Two individuals(1 HIV+and 1 HIV–)presented with headaches as the main symptom for NCC,and four with asymptomatic NCC.Among the HIV+group,TSOL was not associated with CD4+cell counts,HAART duration or HIV stage.Conclusions:This study found lower prevalence of taeniosis,CC and NCC than had been reported in the region to date.This low level of infection may have resulted in an inability to find cross-sectional associations between HIV status and TSOL infection or NCC.Larger sample sizes will be required in future studies conducted in that area to conclude if HIV influences the way NCC manifests itself.展开更多
Background:A number of studies document the prevalence of Taenia solium infections in Nigeria,yet these studies do not cover porcine cysticercosis in private home slaughter slabs where there is no routine meat inspect...Background:A number of studies document the prevalence of Taenia solium infections in Nigeria,yet these studies do not cover porcine cysticercosis in private home slaughter slabs where there is no routine meat inspection and backyard pig keeping,slaughtering and sale are common practice.Methods:An environmental and sanitary assessment was conducted within two unregistered home pig slaughter slabs in selected parts of the Kaduna metropolis in Nigeria.Slaughter premises were inspected for availability of basic facilities and questionnaires were used to elicit necessary informative data.Butchers were examined for taeniasis by stool microscopy and copro-antigen enzyme linked immunosorbent assay(copro-Ag ELISA)to ascertain T.solium-taeniasis.Pigs slaughtered at the premises were examined for cysticerci.Results:Home slaughter conditions were substandard,unhygienic and lacked the basic facilities of a proper slaughterhouse.Prevalence of porcine cysticercosis was 9.3%.The butchers participating in the study had very poor knowledge of T.solium infections and 30%tested positive for taeniasis by copro-Ag ELISA at the time of the study.Conclusion:Home slaughter of pigs in the areas studied should be considered and integrated as a component of prevention and control programmes-particularly through educational interventions-in order to equip individuals involved with a good understanding of the risks associated with animal husbandry and human practices.展开更多
To study the pathological and histochemical characteristics of lesions in piglet livers infected with Taenia saginata asiatica(T.saginata asiatica)throughout the different stages,piglets were fed with eggs of T.sagina...To study the pathological and histochemical characteristics of lesions in piglet livers infected with Taenia saginata asiatica(T.saginata asiatica)throughout the different stages,piglets were fed with eggs of T.saginata asiatica and raised in isolation in an animal center to establish the T.saginata asiatica infection model with normal piglets as control.The pathological changes in the piglet livers were observed after the infection using liver sections stained with hematoxylin and eosin.Histochemical methods were used to check the changes in lipid,glycogen and protein content in the liver.The data collected by image analysis were analyzed statistically with Statistical Package for the Social Science.The results show that T.saginata asiatica-exposed piglets were indeed infected.Inflammatory reactions began on the fourth day and progressed rapidly.Kupffer cell hyperplasia,hepatic hydropic degeneration and ballooning degeneration were found in the 10th–20th days after infection.Hepatic central veins and hepatic sinusoids were dilated and congested.Spotty necrosis occurred in some local liver tissues.In the 40th–60th days,granulomatous reactions and mild hepatocirrhosis were the main lesions.In the 70th–80th days,hepatocirrhosis and bile duct proliferation were observed in the liver.In the different stages,lipid drops were increased while glycogen and protein levels were decreased to some degree.There was a significant difference in metabolism between the infected group and the control group(P<0.01).It is concluded that pigs are the favorable intermediate host of T.saginata asiatica and its infection can result in serious pathological and histochemical lesions in host organs.展开更多
文摘Objective:To differentiate cryptic stage of Echinococcus granulosus(E.granulosus) and Taenia by PCR-RFLP and sequence information of amplicon.Methods:DNA were isolated from metacestodes stage of Taenia and E.granulosus using DNA isolation kit(Q-BIOgene kit,USA), the amplified and purified DNA product was then cloned and sent for sequencing.The generating sequence information was used for amplicons identification.Results:Out of 112 faecal and environmental samples,16 exhibited positive result.The product size of amplicon positive for E.granulosus was 310 bp;whereas,for Taenia spp.sizes varied from 379 to 388 bp.Restriction pr of ile of actinⅡwith Csp61 also differed Taenia spp.and E.granulosus.Conclusions:The result of the study indicated that,the primers were useful to differentiate cryptic stage of the two genera which is yet to be reported earlier.
基金Partial support from the Fogarty International Center/NIH(training grants D43 TW008273-03 and D43 TW001140) is acknowledgedsupported by the Fogarty International Center/NIH(D43 TW008273-03)supported by a Wellcome Trust Senior International Research Fellowship in Public Health and Tropical Medicine
文摘Objective:To assess the efficacy of triclabendazole(TCBZ) in porcine cysticercosis.Methods:Eighteen naturally infected cysticercotic pigs were divided into 3 groups of 6 individuals each.The first group was treated orally with TCBZ at a single dose of 30 mg/kg of body weight,the second group was treated orally with oxfendazole at a single dose of 30 mg/kg of body weight and the third group received a placebo(control group).All animals were kept under the same management conditions.The pigs were euthanized 17 wk post-treatment and the number of surviving cysts in muscles was assessed and compared between groups.Results:All pigs treated with oxfendazole had only degenerated cysts in their carcasses.In contrast,TCBZ had very little effect against the parasitic cysts.Cysts from pigs in the TCBZ group looked apparently normal after treatment.However,histological evaluation showed a mild to moderate degree of inflammation.Conclusions:TCBZ is not an efficacious drug against Taenia solium cysticercosis in swine using a single dose.
基金Partly supported by Fogarty International Center/NIH(training grants D43 TW008273-03 and D43 TW001140)Fogarty International Center/NIH(D43 TW008273-03)
文摘The efficacy of oxfendazole(OFZ) on Taenia hydatigena metacestodes, also called Cysticercus tenuicollis(C. tenuicollis), was studied in 648 raising pigs. This study was performed in Tumbes Department in Peru, an endemic area for cysticercosis. Pigs were randomized in two groups; untreated group(n = 142) did not receive any treatment and treated group(n = 506) received OFZ treatment at a single dose of 30 mg/kg body weight.Six months after treatment, the pigs were necropsied. The prevalence of infection by C. tenuicollis among the pigs was 27.5%(39/142) and 2.0%(10/506) in untreated and treated groups, respectively. Untreated group was infested only with viable cysts, whereas treated group had no viable cysts. All the cysts found in treated group presented degeneration, with a thick membrane, and they contained milky fluid and fibrous tissue. A single dose of OFZ was effective against C. tenuicollis, thus providing an alternative drug for controlling this parasite in pigs.
文摘Taenia spp.are flatworms of the class Cestoda,whose definitive hosts are humans and primates.Human infestation(taeniasis) results from the ingestion of raw meat contaminated with encysted larval tapeworms and is considered relatively harmless and mostly asymptomatic.Anemia is not recognized as a possible sign of taeniasis and taeniasis-induced hemorrhage is not described in medical books.Its therapy is based on anthelmintics such praziquantel,niclosamide or albendazole.Here we describe a case of acute ileal bleeding in an Italian man affected with both Taenia spp.infestation resistant to albendazole and Helicobacter pylori-associated duodenal ulcers.
文摘Infection with tapeworms is a major problem in many parts of the world. Patients may be asymptomatic or have a significant morbidity depending on the species. Infection with Taenia species is sometimes found by expulsion of eggs or proglottids in stool. Species specific diagnosis of Taenia is difficult,but possible. We present a case of Taenia saginata incidentally discovered,and risk factors for transmission,diagnosis,symptoms,and treatment.
文摘[ Objective ] In order to observe the morphological structure of Taenia solium and improve the dyeing method of Taenia solium. [ Method ] Taenia soli- um was stained by hematoxylin-eosin （HE） staining method and observed under microscope. Taenia solium specimens with clear structure and bright color were made. [ Results] Male reproductive system and excretory system of Taenia solium segment could be observed under the optical microscope, structures of uterus and eggs in Taenia solium gravid proglottid could also be observed. [ Conclusion] Aiming at providing a reference for the identification of Taenia solium and the diagnosis of the tapeworm disease.
文摘For decades, Taenia solium cysticercosis (TSC) has remained an important constraint for public health and economic well being of the predisposed communities. Despite the fact that the disease is easily preventable, humans remain foci for transmission. They harbour the mature form of the parasite (Taenia solium) which may be curable at this stage and also easily prevented from contaminating pig feeds and environment with eggs of the parasite to break the cycle. Researchers, knowledgeable communities and international organisations such as the World Health Organisation work hard to make the disease a history. Nevertheless, persistence of the disease in endemic regions such as sub Saharan Africa is kept on increasing. While TSC in human may serve as a silent killer as it can go unnoticed for years, the immanent social cultural settings and lifestyles of the communities in endemic areas form the main concern on the epidemiology of the disease. Unless lifestyles change in endemic regions, front line research might rarely find its way into applications in an area of huge societal and economic impact, the TSC epidemiology. Sincerely, transmission of TSC is favoured by poor sanitation and hygiene which is motivated by lifestyle and poverty. What is perhaps missing is the knowledge on “why is the communities involved ease indiscriminately while almost every member of the community in endemic areas knows that indiscriminate defecation may harm their health? What social drivers are behind this motive (bush defecation)? How best can the disease be controlled and monitored? This review recommends for developing and implementing an interdisciplinary OneHealth community-based control mechanism and monitoring (surveillance) programme as standpoints towards eliminating TSC in sub-Saharan Africa and the rest endemic regions.
文摘Perch sweeper fish with scientific name Cobitis taenia is one of the Cobitidae family. Since this kind of fish lives in clean waters and in the high areas of Talar River, it can be an index on water implution. This survey on the diet of this specimen is done on two stations （Kaselian and Tajoon） and shallow and high areas of Talar River in Mazandaran （Southern part of Caspian sea） and the duration of this survey is from October 2008 till September 2009. We should mention that fishing was just done by electro-shocker with voltage 300 V. And this fish after fishing is fixation in 10% formalin solution. So 410 perch sweeper fish were examined and the average of relatively length of gut （RLG） was 17.35 cm. The index of vacated intestine （VI） was calculated 43.35% for all samples. From intense of diet points of view （GSI）, the most frequency of full intestines was considered in summer and spring. On the other hand, the smallness of relatively length of gut index （RLG 〈 1） shows that perch sweeper fish＇s diet manner is inclined to herbivority. In the examination of containing of digestive track, overally 10 kinds of foodstuff were known. Based on amount of this index, 2.67% Chironomidae is known as main bait in all sampling period.
文摘<strong>Background:</strong> Small bowel obstruction (SBO) is a common gastrointestinal condition often warranting acute surgical intervention. In human, tapeworm species can cause a parasitic infection by ingestion of raw or under cooked beef (<em>T. saginata</em>) or pork (<em>T. solium</em> and <em>T. asiatica</em>). Taeniasis usually presents with vague symptoms or mild abdominal pain and discomfort. The intestinal complications are not commonly mentioned in the literatures.<strong> Case presentation:</strong> We present 65-year-old Egyptian woman who lives in Oman, who is known to have type two diabetes mellitus and hypertension. She presented to Emergency department with abdominal pain and constipation for a period of three days. On examination, she was dehydrated with tachycardia (pulse rate: 110/minute) blood pressure of 100/60 mmHg and patient was afebrile. Abdominal examination revealed, mildly distended abdomen and tense, no guarding or rigidity no palpable mass, exaggerated bowel sound and rectum is empty on per rectal examination. Emergency laparotomy was performed with intra-operative findings of large foreign body impacted in the distal jejunum about 8 × 3 cm, cylinder in shape completely obliterating the lumen, distal loops was collapsed. <strong>Conclusion: </strong>Although Taeniasis is a very rare infection, index of suspicion such as a potential in the differential diagnosis as cause of an acute abdomen with unusual surgical complications should be considered. The diagnosis of these rare circumstances is usually made intraoperatively, and surgery is recommended only for the treatment of complications.
基金This work was conducted with support from the National Institute of Neurological Disorders and Stroke and the Fogarty International Center of the National Institutes of Health under the Brain Disorders in the Developing World:Research Across the Lifespan program,grant R01NS064901(http://www.fic.nih.gov/Programs/Pages/brain-disorders.aspx)The funders had no role in study design,data collection and analysis,interpretation of data,preparation of the paper,or decision to publish the data.
文摘Background:Taeniasis and cysticercosis are two diseases caused by Taenia solium,a parasite transmitted between humans and pigs,leading to considerable economic loss and disabilities.Transmission of the parasite is linked to environmental and behavioural factors such as inadequate sanitation and hygiene,poor pig management,and consumption of infected pork.This study used implementation research method to design a health education intervention strategy for reducing T.solium infections in Burkina Faso,a country endemic for the parasite.Methods:Eighteen group discussions were conducted with 8-18 participants each in three villages.In addition,structured interviews were conducted among 4777 participants and 2244 pig owners,who were selected through cluster random sampling in 60 villages of three provinces of Burkina Faso.Both approaches assessed knowledge and practices related to T.solium.The information obtained was used to develop a community-adapted health education intervention strategy to control taeniasis and cysticercosis in Burkina Faso.Results:The group discussions revealed that participants had a poor quality of life due to the diseases as well as inadequate access to latrines,safe water,and healthcare services.In addition,it was found that pig production was an important economic activity,especially for women.Furthermore,financial and knowledge constraints were important limitations to improved pig management and latrine construction.The survey data also showed that open defecation and drinking unboiled water were common behaviours,enhanced by a lack of knowledge regarding the transmission of the parasite,perceived financial barriers to the implementation of control measures,lack of public sensitization,as well as a lack of self-efficacy towards control of the parasite.Nevertheless,the perceived financial benefits of controlling porcine cysticercosis could be emphasized by an education program that discourages open defecation and encourages drinking safe water.The final intervention strategy included a Participatory Hygiene and Sanitation Transformation(PHAST)approach,as well as a 52-min film and an accompanying comic booklet.Conclusions:The main problem in the study communities regarding the transmission of T.solium cysticercosis is the random disposal of human faeces,which can be contaminated with parasite eggs.Prevention of open defecation requires the building of latrines,which can be quite problematic in economically challenged settings.Providing the community with the skills to construct durable latrines using low-cost locally available materials would likely help to resolve this problem.Further studies are required to implement and evaluate the T.solium control strategy developed in this study.
文摘Background Echinococcosis, coenurosis and cysticercosis are debilitating diseases which prevail in China. Immunological diagnosis of metacestodosis is important in disease control. The 8-kDa glycoproteins from taeniid cestodes have successfully been used for diagnosis of human cysticercosis in immunological assays. The aim of the present study was to investigate genetic variations and phylogenetic relationships of the 8-kDa proteins for evaluating the possibility of utilizing these proteins as diagnostic antigens for other metacestode infections. Methods The genes and complementary DNAs （cDNAs） encoding the 8-kDa proteins from Echinococcus （E.） granulosus, Taenia （T.） multiceps and T. hydatigena were amplified using PCR method. Their amplicons were cloned into the vector pMD18 and the positive clones were sequenced. Sequence data were analyzed with the SeqMan program, and sequence homology searches were performed using the BLAST program. Alignments were conducted using the ClustalX program, and the phylogenetic analyses were performed with the Protein Sequences Program and the Puzzle Program using the Neighbor-joining method. Results Fifteen, 18 and 22 different genomic DNA sequences were identified as members of the 8-kDa protein gene family from E. granulosus, T. multiceps and T. hydatigena, respectively. Eight, four and six different cDNA clones respectively from E. granulosus, T. multiceps and T. hydatigena were characterized. Analysis of these sequences revealed 54 unique 8-kDa protein sequences. Phylogenetic trees demonstrated that the taeniid 8-kDa proteins are clustered into eight clades at least： Ts18, Ts14, TsRS1, TsRS2, T8kDa-1, T8kDa-2, T8kDa-3 and T8kDa-4. Conclusion We found that the gene family encoding for the taeniid 8-kDa antigens is comprised of many members with high diversity, which will provide molecular evidence for cross-reaction or specific reaction among metacestode infections and may contribute to the development of promising immunological methods for diagnosis of metacestodosis.
基金This study was funded by the DFG(German Research Foundation)within the research grant(BR3752/1-1)“Neurocysticercosis in sub-Saharan Africa”.
文摘Background:The frequency of Taenia solium,a zoonotic helminth,is increasing in many countries of sub-Saharan Africa,where the prevalence of the human immunodeficiency virus(HIV)is also high.However,little is known about how these two infections interact.The aim of this study was to compare the proportion of HIV positive(+)and negative(−)individuals who are infected with Taenia solium(TSOL)and who present with clinical and neurological manifestations of cysticercosis(CC).Methods:In northern Tanzania,170 HIV+individuals and 170 HIV–controls matched for gender,age and village of origin were recruited.HIV staging and serological tests for TSOL antibodies(Ab)and antigen(Ag)were performed.Neurocysticercosis(NCC)was determined by computed tomography(CT)using standard diagnostic criteria.Neurological manifestations were confirmed by a standard neurological examination.In addition,demographic,clinical and neuroimaging data were collected.Further,CD4^(+)cell counts as well as information on highly active antiretroviral treatment(HAART)were noted.Results:No significant differences between HIV+and HIV–individuals regarding the sero-prevalence of taeniosis-Ab(0.6%vs 1.2%),CC-Ab(2.4%vs 2.4%)and CC-Ag(0.6%vs 0.0%)were detected.A total of six NCC cases(3 HIV+and 3 HIV–)were detected in the group of matched participants.Two individuals(1 HIV+and 1 HIV–)presented with headaches as the main symptom for NCC,and four with asymptomatic NCC.Among the HIV+group,TSOL was not associated with CD4+cell counts,HAART duration or HIV stage.Conclusions:This study found lower prevalence of taeniosis,CC and NCC than had been reported in the region to date.This low level of infection may have resulted in an inability to find cross-sectional associations between HIV status and TSOL infection or NCC.Larger sample sizes will be required in future studies conducted in that area to conclude if HIV influences the way NCC manifests itself.
文摘Background:A number of studies document the prevalence of Taenia solium infections in Nigeria,yet these studies do not cover porcine cysticercosis in private home slaughter slabs where there is no routine meat inspection and backyard pig keeping,slaughtering and sale are common practice.Methods:An environmental and sanitary assessment was conducted within two unregistered home pig slaughter slabs in selected parts of the Kaduna metropolis in Nigeria.Slaughter premises were inspected for availability of basic facilities and questionnaires were used to elicit necessary informative data.Butchers were examined for taeniasis by stool microscopy and copro-antigen enzyme linked immunosorbent assay(copro-Ag ELISA)to ascertain T.solium-taeniasis.Pigs slaughtered at the premises were examined for cysticerci.Results:Home slaughter conditions were substandard,unhygienic and lacked the basic facilities of a proper slaughterhouse.Prevalence of porcine cysticercosis was 9.3%.The butchers participating in the study had very poor knowledge of T.solium infections and 30%tested positive for taeniasis by copro-Ag ELISA at the time of the study.Conclusion:Home slaughter of pigs in the areas studied should be considered and integrated as a component of prevention and control programmes-particularly through educational interventions-in order to equip individuals involved with a good understanding of the risks associated with animal husbandry and human practices.
基金The study was supported by the National Natural Science Foundation of China(Grant No.30260102)。
文摘To study the pathological and histochemical characteristics of lesions in piglet livers infected with Taenia saginata asiatica(T.saginata asiatica)throughout the different stages,piglets were fed with eggs of T.saginata asiatica and raised in isolation in an animal center to establish the T.saginata asiatica infection model with normal piglets as control.The pathological changes in the piglet livers were observed after the infection using liver sections stained with hematoxylin and eosin.Histochemical methods were used to check the changes in lipid,glycogen and protein content in the liver.The data collected by image analysis were analyzed statistically with Statistical Package for the Social Science.The results show that T.saginata asiatica-exposed piglets were indeed infected.Inflammatory reactions began on the fourth day and progressed rapidly.Kupffer cell hyperplasia,hepatic hydropic degeneration and ballooning degeneration were found in the 10th–20th days after infection.Hepatic central veins and hepatic sinusoids were dilated and congested.Spotty necrosis occurred in some local liver tissues.In the 40th–60th days,granulomatous reactions and mild hepatocirrhosis were the main lesions.In the 70th–80th days,hepatocirrhosis and bile duct proliferation were observed in the liver.In the different stages,lipid drops were increased while glycogen and protein levels were decreased to some degree.There was a significant difference in metabolism between the infected group and the control group(P<0.01).It is concluded that pigs are the favorable intermediate host of T.saginata asiatica and its infection can result in serious pathological and histochemical lesions in host organs.
