Objective:To evaluate the situation regarding gastrointestinal helminth parasites in ruminants (cattle, sheep and goats) slaughtered in the abattoir of Shendi, River Nile State, Sudan. Methods: From September 2015 to ...Objective:To evaluate the situation regarding gastrointestinal helminth parasites in ruminants (cattle, sheep and goats) slaughtered in the abattoir of Shendi, River Nile State, Sudan. Methods: From September 2015 to October 2016, a total of 687 fecal samples were collected and analyzed by flotation and sedimentation techniques. Results: A total of 411 ruminants examined were positive with one or more helminths, giving 59.8% overall prevalence with intensity of 548.23 eggs per gram feces. A total of 12 gastrointestinal helminth parasite genera were identified, including 2 trematodes (Fasciola spp. and Paramphistomum spp.);7 nematodes (Haemonchus spp.,Strongyloides spp., Trichostrongylus sp.,Ostertagia sp.,Ascaris spp.,Nematodirus spp., and Dictyocaulus sp.);and 3 cestodes (Moniezia sp.,Taenia spp., and Dipylidium sp.). Prevalence of Taenia spp. infection was the highest, whereas Trichostrongylus sp. and Dictyocaulus sp. infections had the lowest prevalences. Adult ruminants had higher infection prevalence than the younger ones, but this difference was not statistically significant (P > 0.05). On the other hand, male ruminants had significantly higher infection prevalence than the females (P < 0.05). Helminth prevalence was significantly higher during the rainy season than the dry season. The highest mean egg outputs were recorded for the young and the female ruminants. Likewise, the mean egg output of helminth was higher during the dry than the rainy season, with a significant difference (P < 0.05). Conclusions: These results encourage implementation of effective preventive and control measures directed against the parasites of ruminants throughout the country.展开更多
Objective:To investigate the predation efficacy of the freshwater leech,Limnatis nilotica(L.nilotica)as a potential biological control agent against different stages of the Bulinus truncatus(B.truncatus),the intermedi...Objective:To investigate the predation efficacy of the freshwater leech,Limnatis nilotica(L.nilotica)as a potential biological control agent against different stages of the Bulinus truncatus(B.truncatus),the intermediate host of human Schistosoma haematobium,under laboratory conditions.Methods:The leech L.nilotica and the snail B.truncatus were collected from El Kiryab Agriculture Scheme,Sudan.Thereafter,the predatory activity of the leech was evaluated against eggs,neonates and adults of the snail in a series of different experiments under laboratory conditions.Results:The findings showed that the L.nilotica leech was a voracious predator towards the eggs and neonates of B.truncatus snails with a shell length of up to 3 mm,as well as of adult snails with an shell length greater than 3 mm.Conclusions:The results showed that L.nilotica had a significant impact on B.truncatus populations.However,long term studies under natural field conditions are needed to support these results.展开更多
文摘Objective:To evaluate the situation regarding gastrointestinal helminth parasites in ruminants (cattle, sheep and goats) slaughtered in the abattoir of Shendi, River Nile State, Sudan. Methods: From September 2015 to October 2016, a total of 687 fecal samples were collected and analyzed by flotation and sedimentation techniques. Results: A total of 411 ruminants examined were positive with one or more helminths, giving 59.8% overall prevalence with intensity of 548.23 eggs per gram feces. A total of 12 gastrointestinal helminth parasite genera were identified, including 2 trematodes (Fasciola spp. and Paramphistomum spp.);7 nematodes (Haemonchus spp.,Strongyloides spp., Trichostrongylus sp.,Ostertagia sp.,Ascaris spp.,Nematodirus spp., and Dictyocaulus sp.);and 3 cestodes (Moniezia sp.,Taenia spp., and Dipylidium sp.). Prevalence of Taenia spp. infection was the highest, whereas Trichostrongylus sp. and Dictyocaulus sp. infections had the lowest prevalences. Adult ruminants had higher infection prevalence than the younger ones, but this difference was not statistically significant (P > 0.05). On the other hand, male ruminants had significantly higher infection prevalence than the females (P < 0.05). Helminth prevalence was significantly higher during the rainy season than the dry season. The highest mean egg outputs were recorded for the young and the female ruminants. Likewise, the mean egg output of helminth was higher during the dry than the rainy season, with a significant difference (P < 0.05). Conclusions: These results encourage implementation of effective preventive and control measures directed against the parasites of ruminants throughout the country.
文摘Objective:To investigate the predation efficacy of the freshwater leech,Limnatis nilotica(L.nilotica)as a potential biological control agent against different stages of the Bulinus truncatus(B.truncatus),the intermediate host of human Schistosoma haematobium,under laboratory conditions.Methods:The leech L.nilotica and the snail B.truncatus were collected from El Kiryab Agriculture Scheme,Sudan.Thereafter,the predatory activity of the leech was evaluated against eggs,neonates and adults of the snail in a series of different experiments under laboratory conditions.Results:The findings showed that the L.nilotica leech was a voracious predator towards the eggs and neonates of B.truncatus snails with a shell length of up to 3 mm,as well as of adult snails with an shell length greater than 3 mm.Conclusions:The results showed that L.nilotica had a significant impact on B.truncatus populations.However,long term studies under natural field conditions are needed to support these results.
