Koloren Z, Sotiriadou I, Karanis P
Faculty of Arts and Sciences, University of Ordu, Ordu, Turkey.
Ann Trop Med Parasitol. 2011 Dec;105(8):607-15. doi: 10.1179/2047773211Y.0000000011.
A total of 70 water samples, including tap, river, fountain and well water were collected in the Ordu province, Middle Black Sea, Turkey and investigated for the detection of Cryptosporidium oocysts. The samples were directly screened microscopically for Cryptosporidium oocysts' detection by immunofluorescence test and subsequently DNA was extracted for the molecular detection by loop-mediated isothermal amplification (LAMP) and nested polymerase chain reaction (PCR). Eighteen out of the 70 (25·7%) water samples were found positive for Cryptosporidium spp. by immunofluorescence test and 19 (27·1%) were found positive by LAMP. Nested PCR products were not generated in any of the investigated water samples. A total of 16 randomly selected pellets were spiked with 10 Cryptosporidium oocysts to test the efficiency of the applied method. All the samples were found positive by LAMP for the presence of Cryptosporidium DNA, while the nested PCR assay was positive in only seven (43·75%) out of the 16 examined spiked samples. This is the first report on the occurrence of Cryptosporidium species in environmental and drinking water supplies in the Black Sea area.
在土耳其中黑海地区的奥尔杜省共采集了70份水样,包括自来水、河水、喷泉和井水,并对隐孢子虫卵囊的检测进行了调查。通过免疫荧光试验直接对样本进行显微镜筛查以检测隐孢子虫卵囊,随后提取DNA,采用环介导等温扩增技术(LAMP)和巢式聚合酶链反应(PCR)进行分子检测。70份水样中有18份(25.7%)通过免疫荧光试验检测出隐孢子虫属呈阳性,19份(27.1%)通过LAMP检测呈阳性。在所调查的任何水样中均未产生巢式PCR产物。总共随机选择16个沉淀样本,加入10个隐孢子虫卵囊以测试所应用方法的效率。所有样本通过LAMP检测均发现隐孢子虫DNA呈阳性,而在16个检测的加标样本中,巢式PCR检测仅7个(43.75%)呈阳性。这是关于黑海地区环境和饮用水供应中隐孢子虫种类存在情况的首份报告。