简介:Purifiedproteinderivative(PPD)skintestsoftenyieldpoorspecificity,sothattodevelopnewserologicalantigensfordistinguishingbetweenMycobacteriumtuberculosisinfectionandBacilleCalmette-Guerin(BCG)vaccinationisapriority,especiallyfordevelopingcountrieslikeChina.Wepredictedtheantigenicityforselectedopenreadingframes(ORFs)basedonthegenomesequencesofM.tuberculosisH37RvandM.bovisBCG,aswellastheirfunctionsanddifferencesofexpressionunderdifferentstimulus.ThecandidateORFswereclonedfromH37RvsequencesandexpressedasrecombinantproteinsinEscherichiacoli.Westudiedtheserodiagnosticpotentialof11purifiedrecombinantsbyusingenzyme-linkedimmunosorbentassay(ELISA)andinvolvingacohortcomposedof58TBpatients(34malesand24females),8healthyvolunteersand50PPD-negativeindividualsbeforeandafterBCGvaccination.Forallthe11antigens,themedianODvaluesfortheserafromTBpatientswerestatisticallysignificantlyhigherthanthoseforPPD-negativeindividualsbeforeorafterBCGvaccination(P<0.01).Theyhadatleast92%specificityinhealthycontrolsandsixseroantigens(Rv0251c,Rv1973,Rv2376c,Rv2537c,Rv2785candRv3873A)wereneverreportedwithseroantigenicitiespreviously.Thustheapproachcombiningcomparativegenomics,bioinformaticsandELISAtechniquescanbeemployedtoidentifynewseroantigensdistinguishingM.tuberculosisinfectionfromBCGvaccination.
简介:目的探求足癣彻底治愈的最佳途径。方法将临床已确诊的足癣患者随机分为4组,即:①特比萘芬试验组。②伊曲康唑试验组。③氟康唑试验组。④咪康唑霜试验组。每组分别设对照组。试验组应用抗真菌药物治疗的同时,要求从治疗之日起采取预防真菌再感染的措施,如更换新鞋、袜及鞋垫,不与他人共用浴具等生活用品。对照组除应用抗真菌药物外,其他无特殊要求。结果4个试验组的治愈率(停药2周后)分别比4个对照组的治愈率(停药2周后)各提高27.1%、24.8%、26.6%、25.5%,经统计学处理,各组的x^2值均〉3.841,P〈0.05,试验组与对照组的疗效比较差异有显著性。结论利用抗真菌药物治疗的同时,改变皮损周围真菌的生存环境,是足癣彻底治愈的关键所在。