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对诊断为临床型结核病的奶牛分离株的基因型特征分析。

Genotypic Characterization of Isolates From Dairy Cattle Diagnosed With Clinical Tuberculosis.

作者信息

de Melo Elizabeth Hortêncio, Gomes Harrison Magdinier, Suffys Philip Noel, Lopes Márcia Quinhones Pires, de Figueiredo Teixeira Raquel Lima, Dos Santos Ícaro Rodrigues, Franco Marília Masello Junqueira, Langoni Helio, Paes Antonio Carlos, Afonso José Augusto Bastos, de Mendonça Carla Lopes

机构信息

Programa de Pós-Graduação em Medicina Veterinária, Universidade Federal Rural de Pernambuco, Recife, Brazil.

Laboratório de Biologia Molecular Aplicada à Micobactérias, Fundação Oswaldo Cruz, Laboratório de Biologia Molecular Aplicada à Micobactérias, Rio de Janeiro, Brazil.

出版信息

Front Vet Sci. 2021 Oct 11;8:747226. doi: 10.3389/fvets.2021.747226. eCollection 2021.

Abstract

Molecular diagnosis of bovine tuberculosis plays an essential role in the epidemiological knowledge of the disease. Bovine tuberculosis caused by represents a risk to human health. This study aimed to perform the genotypic characterization of isolated from bovines diagnosed as tuberculosis from dairy herds in the state of Pernambuco, Brazil. Granulomas from 30 bovines were sent for microbiological culture, and colonies compatible with spp. were obtained in at least one culture from 17/30 granulomas. All isolates were confirmed to be by and 24 MIRU-VNTR typing. While characterized the isolates as SB0121, SB0295, SB0852, SB0120, and an unclassified genotype, 24 MIRU-VNTR rendered two clusters of two isolates each and 13 unique profiles. ETR-A showed higher discriminatory power, and (ETR-B, ETR-C, MIRU16, MIRU27, and QUB26) showed moderate allelic diversity. This is the first study on the genetic variability of the infectious agent cause of bovine TB in Pernambuco and demonstrates variability of strains in the state. Thus, it corroborates the importance of this microorganism as agent of bovine tuberculosis and its zoonotic potential, this epidemiological tool being a determinant in the rigor of the sanitary practices of disease control in dairy herds.

摘要

牛结核病的分子诊断在该疾病的流行病学认知中起着至关重要的作用。由[未提及具体病原体名称]引起的牛结核病对人类健康构成风险。本研究旨在对从巴西伯南布哥州奶牛场被诊断为结核病的牛身上分离出的[未提及具体病原体名称]进行基因分型特征分析。从30头牛的肉芽肿中送去进行微生物培养,在至少一种培养物中从17/30个肉芽肿中获得了与[未提及具体病原体名称]属兼容的菌落。所有分离株通过[未提及具体检测方法]和24个MIRU-VNTR分型被确认为[未提及具体病原体名称]。虽然[未提及具体检测方法]将分离株鉴定为SB0121、SB0295、SB0852、SB0120和一种未分类的基因型,但24个MIRU-VNTR产生了两个每组两个分离株的簇和13个独特的图谱。ETR-A显示出更高的鉴别力,而[未提及具体检测方法](ETR-B、ETR-C、MIRU16、MIRU27和QUB26)显示出中等的等位基因多样性。这是关于伯南布哥州牛结核病致病病原体遗传变异性的首次研究,并证明了该州菌株的变异性。因此,它证实了这种微生物作为牛结核病病原体及其人畜共患病潜力的重要性,这种流行病学工具是奶牛场疾病控制卫生实践严格性的决定因素。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d442/8542897/3ea435d930a6/fvets-08-747226-g0001.jpg

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