This study established a loop-mediated isothermal amplification(LAMP)system for specially detecting the pathogen causing tobacco target spot in a rapid manner.With genes encoding the Internal Transcribed Spacer(ITS)as...This study established a loop-mediated isothermal amplification(LAMP)system for specially detecting the pathogen causing tobacco target spot in a rapid manner.With genes encoding the Internal Transcribed Spacer(ITS)as targets,four LAMP primers with high specificity and sensitivity were designed and screened.The specificity and sensitivity of the established method were evaluated,and then the method was used to detect the samples of tobacco plants artificially inoculated with pathogens.The established method enabled the observation of detection results by the color change of dye after 60 min of isothermal amplification at 65°C.In the specificity test,only the reaction tubes of the pathogen causing tobacco target spot appeared green,and the electrophoresis lanes were dispersive,indicating positive results,while all other fungal strains showed negative results.The method had a minimum limit of detection being 0.1 ng/μL for the genomic DNA of the pathogen causing tobacco target spot,allowing direct detection of the pathogen from lesions.The established LAMP method can be directly used for the diagnosis of tobacco plants infected with target spot in the field.展开更多
AIM： To elucidate the clinical, radiological and laboratory pro？les of renal abscess （RA） and perinephric abscess （PNA）, along with related treatment and outcome.METHODS： Ninety-eight patients diagnosed with RA...AIM： To elucidate the clinical, radiological and laboratory pro？les of renal abscess （RA） and perinephric abscess （PNA）, along with related treatment and outcome.METHODS： Ninety-eight patients diagnosed with RA or PNA using the primary discharge diagnoses identi？ed from the International Statistical Classification of Diseases and Related Health Problems Tenth Edition （ICD-10） codes （RA： N15.101, PNA： N15.102） between September 2004 and December 2014 in West China Hospital were selected. Medical records including patients’ characteristics, symptoms and signs, high-risk factors, radiological features, causative microorganisms and antibiotic-resistance pro？les, treatment approaches, and clinical outcomes were collected and analyzed.RESULTS： The mean age of the patients was 46.49 years with a male to female ratio of 41：57. Lumbar pain （76.5%） and fever （53.1%） were the most common symptoms. Other symptoms and signs included chills （28.6%）, anorexia and vomiting （25.5%）, lethargy （10.2%）, abdominal pain （11.2%）, fank mass （12.2%）, fank ？stula （2.0%）, gross hematuria （7.1%）, frequency （14.3%）, dysuria （9.2%）, pyuria （5.1%） and weight loss （1.0%）. Painful percussion of the costovertebral angle （87.8%） was the most common physical ？nding. The main predisposing factors were lithiasis （48.0%）, diabetes mellitus （33.7%） followed by history of urological surgery （16.3%）, urinary tract infections （14.3%）, renal function impairment （13.3%）, liver cirrhosis （2.0%）, neurogenic bladder （1.0%）, renal cyst （1.0%）, hydronephrosis （1.0%）, chronic hepatitis B （1.0%）, post-discectomy （1.0%） and post-colectomy （1.0%）. Ultrasound （US） and computed tomography were the most valuable diagnostic tools and US was recommended as the initial diagnostic imaging choice.Escherichia coli （51.4%）, Staphylococcus aureus （10.0%） and Klebsiella pneumoniae （8.6%） were the main causative microorganisms. Intravenous antibiotic therapy was necessary while intervention including surgical and nonsurgical approaches were reserved for larger abscesses, multiple abscesses, PNAs and non-responders. CONCLUSION： Heightened alertness, prompt diagnosis, and especially proper antibiotics in conjunction with interventional approaches allow a promising clinical outcome of renal and perinephric abscesses.展开更多
文摘This study established a loop-mediated isothermal amplification(LAMP)system for specially detecting the pathogen causing tobacco target spot in a rapid manner.With genes encoding the Internal Transcribed Spacer(ITS)as targets,four LAMP primers with high specificity and sensitivity were designed and screened.The specificity and sensitivity of the established method were evaluated,and then the method was used to detect the samples of tobacco plants artificially inoculated with pathogens.The established method enabled the observation of detection results by the color change of dye after 60 min of isothermal amplification at 65°C.In the specificity test,only the reaction tubes of the pathogen causing tobacco target spot appeared green,and the electrophoresis lanes were dispersive,indicating positive results,while all other fungal strains showed negative results.The method had a minimum limit of detection being 0.1 ng/μL for the genomic DNA of the pathogen causing tobacco target spot,allowing direct detection of the pathogen from lesions.The established LAMP method can be directly used for the diagnosis of tobacco plants infected with target spot in the field.
文摘AIM： To elucidate the clinical, radiological and laboratory pro？les of renal abscess （RA） and perinephric abscess （PNA）, along with related treatment and outcome.METHODS： Ninety-eight patients diagnosed with RA or PNA using the primary discharge diagnoses identi？ed from the International Statistical Classification of Diseases and Related Health Problems Tenth Edition （ICD-10） codes （RA： N15.101, PNA： N15.102） between September 2004 and December 2014 in West China Hospital were selected. Medical records including patients’ characteristics, symptoms and signs, high-risk factors, radiological features, causative microorganisms and antibiotic-resistance pro？les, treatment approaches, and clinical outcomes were collected and analyzed.RESULTS： The mean age of the patients was 46.49 years with a male to female ratio of 41：57. Lumbar pain （76.5%） and fever （53.1%） were the most common symptoms. Other symptoms and signs included chills （28.6%）, anorexia and vomiting （25.5%）, lethargy （10.2%）, abdominal pain （11.2%）, fank mass （12.2%）, fank ？stula （2.0%）, gross hematuria （7.1%）, frequency （14.3%）, dysuria （9.2%）, pyuria （5.1%） and weight loss （1.0%）. Painful percussion of the costovertebral angle （87.8%） was the most common physical ？nding. The main predisposing factors were lithiasis （48.0%）, diabetes mellitus （33.7%） followed by history of urological surgery （16.3%）, urinary tract infections （14.3%）, renal function impairment （13.3%）, liver cirrhosis （2.0%）, neurogenic bladder （1.0%）, renal cyst （1.0%）, hydronephrosis （1.0%）, chronic hepatitis B （1.0%）, post-discectomy （1.0%） and post-colectomy （1.0%）. Ultrasound （US） and computed tomography were the most valuable diagnostic tools and US was recommended as the initial diagnostic imaging choice.Escherichia coli （51.4%）, Staphylococcus aureus （10.0%） and Klebsiella pneumoniae （8.6%） were the main causative microorganisms. Intravenous antibiotic therapy was necessary while intervention including surgical and nonsurgical approaches were reserved for larger abscesses, multiple abscesses, PNAs and non-responders. CONCLUSION： Heightened alertness, prompt diagnosis, and especially proper antibiotics in conjunction with interventional approaches allow a promising clinical outcome of renal and perinephric abscesses.
