Prevalence of natural infection by Trypanosoma evansi in Crioula LAGEANA cattle

Prevalence of natural infection by Trypanosoma evansi in Crioula LAGEANA cattle

Cattle trypanosomiasis negatively impacts animal husbandry due to high morbidity, productivity losses, and mortality rates. Knowledge regarding Trypanosoma evansi infections in locally adapted breeds remains limited. Some cattle breeds exhibit trypanotolerance, requiring the determination of prevale...

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Bibliographic Details
Published in:Microbial pathogenesis Vol. 180; p. 106143
Main Authors: Fiorin, Felipe Eduardo, Casa, Mariana da Silva, Griebeler, Leonardo Bergman, Goedel, Mariana Fuchs, Nascimento, Luís Flávio Nepomuceno do, Neves, Gabriella Bassi das, Fonteque, Graziela Vieira, Miletti, Luiz Claudio, Saito, Mere Erika, Fonteque, Joandes Henrique
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01-07-2023
Subjects:
Animal health
Animals
Cattle
Cattle Diseases - epidemiology
DNA, Protozoan - genetics
Hematology
Locally adapted breed
Polymerase Chain Reaction - methods
Prevalence
Trypanosoma - genetics
Trypanosomiasis
Trypanosomiasis - epidemiology
Trypanosomiasis - parasitology
Trypanosomiasis - veterinary
Hematology
Locally adapted breed
Animal health
Trypanosomiasis
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Summary:Cattle trypanosomiasis negatively impacts animal husbandry due to high morbidity, productivity losses, and mortality rates. Knowledge regarding Trypanosoma evansi infections in locally adapted breeds remains limited. Some cattle breeds exhibit trypanotolerance, requiring the determination of prevalence, as well as related tolerance and resistance characteristics, for disease control programs. This study aimed to determine T. evansi prevalence in Crioula Lageana cattle and associate clinical, hematological, and biochemical aspects with the infection to further research on tolerance in this population. Blood samples from 310 Crioula Lageana cattle were tested using Polymerase Chain Reaction (PCR) and Indirect Immunofluorescence Reaction (IIFR). T. evansi prevalence was 8% (24/310) using PCR and 4% (11/310) using IIFR. Positive animals showed increased ruminal movements, elevated eosinophil counts, and reduced monocyte numbers, but both latter within the reference range for the species. Albumin concentrations were low in positive cases and remained below the reference range limit for both groups. However, triglycerides exceeded the physiological range for the species in both positive and negative groups. Increased gamma-glutamyltransferase (GGT) activity was observed in positive animals. In conclusion, Crioula Lageana cattle exhibited enzootic instability with a low T. evansi infection prevalence when assessed using PCR and IIFR techniques. Furthermore, the animals did not display clinical, hematological, or biochemical alterations attributable to the presence of hemoparasites. •Polymerase Chain Reaction used to diagnose Trypanosoma evansi.•The prevalence of T. evansi in Crioula Lageana cattle indicates enzootic instability.•Indirect Immunofluorescence Reaction usage on T. evansi diagnosis.•Natural infection by T. evansi doesn't necessarily cause clinical symptoms.
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ISSN:0882-4010
1096-1208
DOI:10.1016/j.micpath.2023.106143