Copyright ©版權(quán)歸生物谷所有,,若未得到Bioon授權(quán),請勿轉(zhuǎn)載,。
近日,,研究者在健康婦女的膀胱中發(fā)現(xiàn)了細菌的存在,這就推翻了先前的“正常的尿液是無菌的”這種說法,。來自羅耀拉大學(xué)芝加哥醫(yī)學(xué)院(SSOM)的研究者將他們最新的研究成果刊登在了于近日刊登在了雜志Journal of Clinical Microbiology上,。SSOM的研究者Linda Brubaker表示,,一般醫(yī)生們認為尿液是無菌的,但是我們的研究發(fā)現(xiàn)證明健康人群的尿液是攜帶細菌的,,這項研究可以為那些泌尿道感染的病人治療提供某些建議,。
這項研究中,研究者們對那些類似有泌尿道感染癥狀的婦女(未感染)的尿液樣本進行了相關(guān)研究,,對尿液進行基于高級DNA檢測的方法進行分析,,檢測結(jié)果表明,成年女性的膀胱中存在各種形式的細菌,,而這些細菌并不能用常規(guī)檢測泌尿道感染的方法來進行檢測,。研究者Alan Wolfe表示,,以前尿培養(yǎng)的標(biāo)準(zhǔn)方法可以檢測泌尿道感染,,但是完全沒有發(fā)揮這種方法的用途,但是這種方法并沒有我們當(dāng)前所用的基于DNA檢測的方法那么有效,。
研究者的這項研究也注重于尿液的收集方法,,研究結(jié)果顯示,標(biāo)準(zhǔn)的用小杯接尿的方法明顯有問題,,因為來自婦女陰道的細菌也可以污染我們的樣品,,致使檢測結(jié)果不準(zhǔn)確。相比之下,,用導(dǎo)管或者針管取尿液的方法相對更為有效和準(zhǔn)確,。研究者目前計劃研究膀胱中哪些細菌有益,而哪些細菌又有害處,。研究者們希望通過研究的方法檢測到細菌之間的相互作用以及和宿主之間的作用,,從而為病人的治療提供一些幫助。研究者們的重點是識別健康人群膀胱中的細菌組成,,這樣研究者們才能將特定的細菌組成部分以及相應(yīng)的疾病聯(lián)系起來,。
后期,研究者需要確定本研究中在婦女膀胱中發(fā)現(xiàn)的細菌和機體的泌尿狀況有關(guān)系,。研究者Brubaker表示,,如果確實有關(guān)系的話,我們就可以給處于高風(fēng)險的婦女一些提示以免于相應(yīng)細菌的感染,,以及給病人提供一些治療建議,。
(生物谷:T.Shen編譯)
Copyright ©版權(quán)歸生物谷所有,若未得到Bioon授權(quán),,請勿轉(zhuǎn)載,。
doi:10.1128/JCM.05852-11
PMC:
PMID:
Evidence of Uncultivated Bacteria in the Adult Female Bladder
Alan J. Wolfea, Evelyn Tohb, Noriko Shibataa, Ruichen Rongc, Kimberly Kentona, MaryPat FitzGeralda, Elizabeth R. Muellera, Paul Schreckenbergera, Qunfeng Dongc, David E. Nelsonb and Linda Brubakera
Clinical urine specimens are usually considered to be sterile when they do not yield uropathogens using standard clinical cultivation procedures. Our aim was to test if the adult female bladder might contain bacteria that are not identified by these routine procedures. An additional aim was to identify and recommend the appropriate urine collection method for the study of bacterial communities in the female bladder. Consenting participants who were free of known urinary tract infection provided urine samples by voided, transurethral, and/or suprapubic collection methods. The presence of bacteria in these samples was assessed by bacterial culture, light microscopy, and 16S rRNA gene sequencing. Bacteria that are not or cannot be routinely cultivated (hereinafter called uncultivated bacteria) were common in voided urine, urine collected by transurethral catheter (TUC), and urine collected by suprapubic aspirate (SPA), regardless of whether the subjects had urinary symptoms. Voided urine samples contained mixtures of urinary and genital tract bacteria. Communities identified in parallel urine samples collected by TUC and SPA were similar. Uncultivated bacteria are clearly present in the bladders of some women. It remains unclear if these bacteria are viable and/or if their presence is relevant to idiopathic urinary tract conditions