Avaliação de técnicas para diagnóstico de infecções por Trypanosoma vivax em bovinos naturalmente infectados na Zona da Mata Mineira

Autor: Jefferson Filgueira Alcindo, Maria Clara Guimarães Vieira, Thamiris Vilela Pereira Rocha, Cinthya Brillante Cardinot, Maurício Deschk, Gláucia Guimarães Amaral, Rafael Ferreira de Araujo, Carina Franciscato, Kayo José Garcia de Almeida Castilho Neto, Rosângela Zacarias Machado, Marcos Rogério André
Přispěvatelé: Universidade Federal de Juiz de Fora – UFJF, Universidade Estadual Paulista (UNESP)
Rok vydání: 2022
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1984-2961
0103-846X
Popis: Made available in DSpace on 2022-04-29T08:40:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01 This study aimed to evaluate diagnostic techniques for trypanosomiasis, caused by Trypanosoma vivax, in naturally infected cattle in Minas Gerais, Zona da Mata. The deaths of six lactating cows with similar clinical conditions— characterized by hyporexia, hypogalactia, and recumbency—had been reported from one property. Initially, two animals were examined and diagnosed with trypanosomiasis through identification of the protozoan in a blood smear. After the initial diagnosis, all lactating cows (n=37) on the property were examined, and blood samples were collected for tests including whole blood smear, buffy coat smear, Woo’s technique, enzyme-linked immunosorbent assay (ELISA), and polymerase chain reaction (PCR). Woo’s test, buffy coat smears, and whole blood smears indicated that 4/37 (10.81%) animals were positive for trypanosomiasis, whereas ELISA and PCR indicated that 33/37 (89.19%) and 27/37 (72.97%) animals, respectively, were positive. The agreement obtained between parasitological techniques was classified as high, while between ELISA and PCR, no agreement. In conclusion, parasitological techniques have a low capacity to identify infected animals in the chronic stage of T. vivax infection. Therefore, techniques such as PCR and/or ELISA should be used to minimize the occurrence of false negatives. Laboratório de Patologia Clínica Departamento de Medicina Veterinária Universidade Federal de Juiz de Fora – UFJF, MG Laboratório de Imunoparasitologia Departamento de Patologia Reprodução e Saúde Única Faculdade de Ciências Agrárias e Veterinárias – FCAV Universidade Estadual Paulista – UNESP, SP Laboratório de Imunoparasitologia Departamento de Patologia Reprodução e Saúde Única Faculdade de Ciências Agrárias e Veterinárias – FCAV Universidade Estadual Paulista – UNESP, SP
Databáze: OpenAIRE
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