Molecular characterization of a new genotype of Cryptosporidium from American minks (Mustela vison) in China

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• 作者：Rongjun Wang ; Longxian Zhang ; Yaoyu Feng ; Changshen Ning ; Fuchun Jian ; Lihua Xiao ; Jinfeng Zhao ; Yongli Wang
• 关键词：Cryptosporidium ; Mink ; Mink genotype ; 18S rRNA ; HSP70 ; COWP ; Actin
• 刊名：Veterinary Parasitology
• 出版年：2008
• 出版时间：14 June 2008
• 年：2008
• 卷：154
• 期：1-2
• 页码：162-166
• 全文大小：733 K

文摘

A total of 469 fecal samples were collected from American minks (Mustela vison) on a farm in Hebei Province in China and examined for Cryptosporidium by Sheather's sugar flotation technique and 8 Cryptosporidim isolates were obtained. The partial 18S rRNA, 70 kDa heat shock protein (HSP70), Cryptosporidium oocyst wall protein (COWP) and actin genes of six isolates were sequenced. Sequence data were analyzed together with known Cryptosporidium spp. and genotypes. Results of this multi-locus genetic characterization indicated that the six Cryptosporidium isolates in this study shared the same sequences of the genes studied and were different from known Cryptosporidium species and genotypes. The closest relative was Cryptosporidium ferret genotype with 7, 22, 2 and 2 nucleotide differences in the 18S rRNA, HSP70, COWP and actin genes, respectively. The homology to ferret genotype at the 18S rRNA locus was 99.1 % , which is comparable to that between C. parvum and C. hominis (99.2 % ), or between C. muris and C. andersoni (99.4 % ). Therefore, the Cryptosporidium in minks in this study is considered a new genotype, the Cryptosporidium mink genotype.