目的:猪囊虫病是一种被忽视的人畜共患疾病,由于其经济影响和公共卫生意义,具有重要的兽医和医学意义。本研究旨在研究哈里亚纳邦(印度北部)屠宰猪中猪带虫的遗传特征。
方法:总共213个(分别来自昌迪加尔和希萨尔的160个和53个,分别)对打算供人类食用的屠宰猪进行了筛查,以确定是否存在T.soliummetacestodes。根据线粒体细胞色素c氧化酶亚基1(CO1)基因的部分扩增,对检索到的细胞进行了分子确认。进化分歧,还评估了检索到的分离株的单倍型和核苷酸多样性以及中性指数。
结果:在213头猪中,2(0.94%)显示存在长牙(0.62%)和Hisar(1.9%)分别涉及1头猪。将定制测序后获得的序列以登录号LC661682-83提交给GenBank。本研究的单倍型与亚洲起源的单倍型聚集在一起,并通过1-23个突变步骤显示出与其他单倍型的差异。然而,本研究分离株还显示出核苷酸多态性(A198T,A199G,A201T,G204A,T206A,C210T,T212G,T213A,T216G/A,T217C,T221C,C524T,G994A)在不同的位置,这表明了亚谱系的存在。对于所考虑的单倍型观察到的低核苷酸多样性(π=0.020)和Tajima'sD的负值(-1.304)表明纯化选择和最近的种群扩展。
结论:我们的研究证实了研究区域中梭菌亚洲基因型(具有不同的亚谱系)的循环,并建议采取严格的控制措施以遏制人畜共患疾病。
OBJECTIVE: Porcine cysticercosis is a neglected zoonotic disease of significant veterinary and medical importance owing to its economic impact and public health significance. The present study aimed at genetic characterization of Taenia solium metacestodes in slaughtered pigs of Haryana (North India).
METHODS: A total of 213 (160 and 53 from Chandigarh and Hisar, respectively) slaughtered pigs intended for human consumption were screened for the presence of T. solium metacestodes. The retrieved metacestodes were confirmed molecularly based on the partial amplification of mitochondrial cytochrome c oxidase subunit 1 (CO1) gene. Evolutionary divergence, haplotype and nucleotide diversities and neutrality indices of the retrieved isolates were also assessed.
RESULTS: Out of the 213 pigs, 2 (0.94%) revealed the presence of metacestodes involving 1 pig each from Chandigarh (0.62%) and Hisar (1.9%). The sequences obtained after custom sequencing were submitted to GenBank under the accession numbers LC661682-83. The present study haplotype clustered with haplotypes of Asian origin and showed variation from other haplotypes by 1-23 mutational steps. However, the present study isolates also showed nucleotide polymorphisms (A198T, A199G, A201T, G204A, T206A, C210T, T212G, T213A, T216G/A, T217C, T221C, C524T, G994A) at different positions, which indicated the presence of sub-lineages. Low nucleotide diversity (π = 0.020) and negative value of Tajima\'s D (- 1.304) observed for the haplotypes under consideration was indicative of purifying selection and recent population expansion.
CONCLUSIONS: Our study confirms the circulation of T. solium Asian genotype (with distinct sub-lineages) in study area and recommends strict control measures to contain the zoonotic disease.