Genotypes of Enterocytozoon bieneusi in livestock in China: high prevalence and zoonotic potential.

Genotypes of Enterocytozoon bieneusi in livestock in China: high prevalence and zoonotic potential.
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DOI:
10.1371/journal.pone.0097623
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Xiao L
Xiao L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li W;Li Y;Li W;Yang J;Song M;Diao R;Jia H;Lu Y;Zheng J;Zhang X;Xiao L

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尽管全球范围内的比氏肠细胞虫基因型表征以及对人类和动物之间微孢子虫病跨物种传播程度的探索取得了许多进展,但对这种被忽视的疾病在中国的流行病学仍知之甚少。在本研究中,通过核糖体内转录间隔区(ITS)的PCR检测到吉林省养殖猪中比氏艾美耳球虫感染的患病率非常高(60.3%;94/156)。对 88 个 E. bieneusi 阳性样本的 DNA 序列分析鉴定出 12 种不同的基因型(11 种已知:CHN7、CS-1、CS-4、CS-6、EbpA、EbpB、EbpC、EbpD、EBITS3、G 和 Henan-I;一种新基因型:CS-9)。在研究动物中经常出现混合基因型感染。断奶猪(74.6%;53/71)或断奶前猪(68.8%;22/32)的感染率显着高于生长猪(35.8%;19/53)(p<0.01)。同样,黑龙江省 45 份羊粪便标本中,有 2 份(4.4%)检测到 E. bieneusi,属于已知基因型 BEB6。本文检查的基因型 EbpA、EbpC、EbpD 和 Henan-I 已在中国中部地区的人类感染病例和废水中的 BEB6、EbpA、EbpC 和 EbpD 病例中得到记录。世界其他地区也有人类感染 EbpA 和 EbpC 的报道。其他已知基因型(CHN7、CS-1、CS-4、CS-6、EBITS3、EbpB 和 G)和新基因型 CS-9 在遗传上聚类为一组现有的具有人畜共患潜力的 E. bieneusi 基因型。因此,猪可能是中国人类比氏艾美耳球虫感染的潜在来源。
Despite many recent advances in genotype characterization of Enterocytozoon bieneusi worldwide and the exploration of the extent of cross-species transmission of microsporidiosis between humans and animals, the epidemiology of this neglected disease in China is poorly understood. In this study, a very high prevalence (60.3%; 94/156) of E. bieneusi infections in farmed pigs in Jilin province was detected by PCR of the ribosomal internal transcribed spacer (ITS). DNA sequence analysis of 88 E. bieneusi–positive specimens identified 12 distinct genotypes (11 known: CHN7, CS-1, CS-4, CS-6, EbpA, EbpB, EbpC, EbpD, EBITS3, G, and Henan-I; one novel: CS-9). Frequent appearance of mixed genotype infections was seen in the study animals. Weaned (74.6%; 53/71) or pre-weaned (68.8%; 22/32) pigs have infection rates significantly higher than growing pigs (35.8%; 19/53) (p<0.01). Likewise, E. bieneusi was detected in 2 of 45 sheep fecal specimens (4.4%) in Heilongjiang province, belonging to the known genotype BEB6. Genotypes EbpA, EbpC, EbpD, and Henan-I examined herein have been documented in the cases of human infections and BEB6, EbpA, EbpC, and EbpD in wastewater in central China. Infections of EbpA and EbpC in humans were also reported in other areas of the world. The other known genotypes (CHN7, CS-1, CS-4, CS-6, EBITS3, EbpB, and G) and the new genotype CS-9 were genetically clustered into a group of existing E. bieneusi genotypes with zoonotic potential. Thus, pigs could be a potential source of human E. bieneusi infections in China.
通过废水中寄生虫的基因分型和分型对隐孢子虫属、十二指肠贾第鞭毛虫和比氏肠细胞虫进行分子监测
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