The seroprevalence of equine trypanosomosis in the pantanal.
Abstract: Since little information is available on the epizootiological status of Trypanosoma evansi in South America and particularly Brazil, we evaluated equine serum samples collected in 1993, 1994, 1995 and 1997 for the presence of antibodies against this trypanosome species. Our study shows corroborative evidence about the correlation among high T. evansi seroprevalence and the rainy season in the Pantanal, Brazil. The higher seroprevalence was 79.2% in horses from a ranch located in the Nhecolândia sub-region in 1994 and the lower 5.8% in animals from the same ranch in 1997. No seroprevalence was found in 1993. The possible re-introduction of T. evansi in the region as well as the relationship among our results with the outbreaks reported in 1994, are briefly discussed.
Publication Date: 1999-05-04 PubMed ID: 10224528DOI: 10.1590/s0074-02761999000200014Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This study looked into the prevalence of antibodies against Trypanosoma evansi, a parasite causing equine trypanosomosis, in horse serum samples collected in the Pantanal, Brazil from 1993 to 1997. The results showed a correlation between high T. evansi seroprevalence and the rainy season, with the highest prevalence recorded in 1994 and the lowest in 1997.
Research Objective and Methods
- The research intended to investigate the prevalence of Trypanosoma evansi, a parasite known to cause equine trypanosomosis, in the Pantanal, Brazil, due to limited existing information on the epizootiological status of the parasite in South America, particularly in Brazil.
- The researchers achieved this by analysing serum samples from horses collected in the years 1993, 1994, 1995, and 1997 for the presence of antibodies against T. evansi.
- The study location was deliberately set in the Pantanal, as it is a significant ecological region in Brazil where equine trypanosomosis is believed to be common.
Research Findings
- The research exhibited evidence of a correlation between high seroprevalence of T. evansi and the rainy season in the Pantanal.
- The highest seroprevalence recorded was 79.2% from horses in a ranch located in the Nhecolândia sub-region in 1994.
- The lowest seroprevalence found was 5.8% in animals from the same ranch in 1997.
- In 1993, no seroprevalence was discovered.
Research Implications and Observations
- The research upheld the assumption of a possible re-introduction of T. evansi in the region and theorised a relationship between their results and the outbreaks reported in 1994.
- These findings help to elucidate the epizootiological status of T. evansi in Pantanal, thereby providing important insights for addressing the disease problem possibly caused by the parasite.
- Understanding the T. evansi seroprevalence in horses could provide a platform for the development of useful preventive and control strategies against equine trypanosomosis in the region.
Cite This Article
APA
Dávila AM, Souza SS, Campos C, Silva RA.
(1999).
The seroprevalence of equine trypanosomosis in the pantanal.
Mem Inst Oswaldo Cruz, 94(2), 199-202.
https://doi.org/10.1590/s0074-02761999000200014 Publication
Researcher Affiliations
- Laboratório de Sanidade Animal, Embrapa, Corumbá, MS, Brasil. davila@gene.dbbm.fiocruz.br
MeSH Terms
- Animals
- Antibodies, Protozoan / blood
- Brazil / epidemiology
- Horse Diseases / epidemiology
- Horses
- Incidence
- Prevalence
- Seroepidemiologic Studies
- Trypanosoma / immunology
- Trypanosomiasis / epidemiology
- Trypanosomiasis / veterinary
Citations
This article has been cited 2 times.- Kamidi CM, Auma J, Mireji PO, Ndungu K, Bateta R, Kurgat R, Ouma C, Aksoy S, Murilla G. Differential virulence of camel Trypanosoma evansi isolates in mice. Parasitology 2018 Aug;145(9):1235-1242.
- Sousa JA, Miranda LM, Coutinho DJB, Costa TF, Costa SP, Freitas ÚS, Costa FB, Machado RZ, Nogueira RMS, Costa APD. Trypanosoma evansi in Brazil: first evidence of infection in equines from Northeast region. Rev Bras Parasitol Vet 2025;34(2):e000125.
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