SEROPREVALENCE OF Trypanosoma vivax, Anaplasma marginale, and Babesia bovis IN DAIRY CATTLE

Jonata de Melo Barbieri; Yuly Andrea Caicedo Blanco; Fábio Raphael Pascoti Bruhn; Antônio Marcos Guimarães

doi:10.1590/1089-6891v17i434091

SEROPREVALENCE OF Trypanosoma vivax, Anaplasma marginale, and Babesia bovis IN DAIRY CATTLE

Authors

Jonata de Melo Barbieri Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brazil
Yuly Andrea Caicedo Blanco Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil
Fábio Raphael Pascoti Bruhn Universidade Federal de Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brasil
Antônio Marcos Guimarães Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brasil

DOI:

https://doi.org/10.1590/1089-6891v17i434091

Keywords:

trypanosomiasis, enzootic stability, anaplasmosis, babesiosis, dairy cattle.

Abstract

In order to determine the prevalence of IgG against Trypanosoma vivax, Anaplasma marginale, and Babesia bovis in dairy cattle in southern Minas Gerais, four hundred cows from 40 dairy farms were randomly selected and distributed in 14 municipalities. Seroprevalence was determined by indirect immunofluorescence assay (IFA). Interviews were conducted to characterize producers and dairy production. Univariate analysis was carried out using chi-square (x2) or Fisher’s exact test. The multiple model was constructed with variables associated with p ? 0.25 by x2 test using generalized estimating equations (GEE). True prevalence at herd level was 49.6% (31.7–67.5), 100% (92.1–100), and 100% (86.5–100) for T. vivax, A. marginale, and B. bovis, respectively. At individual level, true seroprevalence was 9.9% (6.7–13.1), 96.2% (92.1–99.6), and 93.7% (89.4–97.2), respectively, for T. vivax, A. marginale, and B. bovis. Among the factors adjusted by logistic regression GEE model, “total farm area” (p= 0.021, OR= 0.308, Ic95%= 0.114–0.836) and “fly season” (p= 0.016, OR= 2.133, Ic95%= 1.153–3.948) remained associated with seropositivity for T. vivax. As the State of Minas Gerais is considered non-endemic for T. vivax, producers and veterinarians should be informed about the risk of occurrence of bovine trypanosomiasis.

Keywords: anaplasmosis; babesiosis; dairy cattle; enzootic stability; trypanosomiasis.

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Published

2016-10-28

How to Cite

BARBIERI, J. de M.; BLANCO, Y. A. C.; BRUHN, F. R. P.; GUIMARÃES, A. M. SEROPREVALENCE OF Trypanosoma vivax, Anaplasma marginale, and Babesia bovis IN DAIRY CATTLE. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 17, n. 4, p. 564–573, 2016. DOI: 10.1590/1089-6891v17i434091. Disponível em: https://revistas.ufg.br/vet/article/view/34091. Acesso em: 23 apr. 2025.

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Issue

Vol. 17 No. 4 (2016)

Section

Veterinary Medicine

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