Article
Molecular Typing of Mycobacterium bovis from Cattle Reared in Midwest Brazil
Registro en:
CARVALHO, Ricardo César Tavares; et al. Molecular Typing of Mycobacterium bovis from Cattle Reared in Midwest Brazil. Plos One, v.11, n.9, e0162459, 16p, Sept. 2016.
1932-6203
10.1371/journal.pone.0162459
Autor
Carvalho, Ricardo César Tavares
Vasconcellos, Sidra Ezidio Gonçalves
Issa, Marina de Azevedo
Soares Filho, Paulo Martins
Mota, Pedro Moacyr Pinto Coelho
Araújo, Flábio Ribeiro de
Carvalho, Ana Carolina da Silva
Gomes, Harrison Magdinier
Suffys, Philip Noel
Figueiredo, Eduardo Eustáquio de Souza
Paschoalin, Vânia Margaret Flosi
Resumen
Mycobacterium bovis is the causative agent of bovine tuberculosis (BTB), the pathogen responsible for serious economic impact on the livestock sector. In order to obtain data on isolated M. bovis strains and assist in the control and eradication program for BTB, a cross sectional descriptive molecular epidemiology study in the Brazilian Midwest was conducted. Through spoligotyping and 24-loci MIRU-VNTR methods, 37 clinical isolates of M. bovis circulating in the region were analyzed, 10 isolated from the state of Mato Grosso, 12 from the state of Mato Grosso do Sul and 15 from the state of Goiás. The spoligotyping analysis identified 10 distinct M. bovis profiles (SB0121 n = 14, SB0295 n = 6, SB0140 n = 6, SB0881 n = 3, SB1144 n = 2, SB1145 n = 2, SB0134 n = 1, SB1050 n = 1, SB1055 n = 1, SB1136 n = 1) grouped in six clusters and four orphan patterns. The MIRU-VNTR 24-loci grouped the same isolates in six clusters and 22 unique orphan patterns, showing higher discriminatory power than spoligotyping. When associating the results of both techniques, the isolates were grouped in five clusters and 24 unique M. bovis profiles. Among the 24-loci MIRU-VNTR evaluated, two, ETR-A and QUB 11b loci, showed high discriminatory ability (h = ≥ 0.50), while MIRU 16, MIRU 27, ETR-B, ETR-C, Mtub21 and QUB 26 loci showed moderate ability (h = 0.33 or h = 0.49) and were the most effective in evaluating the genotypic similarities among the clinical M. bovis isolate samples. Herein, the 29 patterns found amongst the 37 isolates of M. bovis circulating in the Brazilian Midwest can be due to the animal movement between regions, municipalities and farms, thus causing the spread of various M. bovis strains in herds from Midwest Brazil.