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Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria2011; 20(3); 235-241; doi: 10.1590/s1984-29612011000300011

Factors associated to Theileria equi in equids of two microregions from Rio de Janeiro, Brazil.

Abstract: Serum samples from 714 equids of Itaguaí and Serrana microregions, Rio de Janeiro, southeastern Brazil, were examined by indirect fluorescent antibody test (titer 1:80) for Theileria equi. The prevalence in the microregions and factors associated with seropositivity were evaluated and the prevalence ratio (PR) calculated. The overall prevalence of T. equi infection was 81.09% (n = 579), with higher prevalence (p < 0.05) in the Itaguaí (85.43%) when compared to Serrana microregion (76.92%). The geographic area, altitude, farming condition and area of origin of equids were associated (p < 0.05) with seropositivity for T. equi. Equids reared in the Itaguaí microregion (PR = 1.11, p = 0.003) and at altitudes below 500 m (PR = 1.10; p = 0,014) were more likely to be seropositive for T. equi. Furthermore, when equids were born in the farm (PR = 1.10, p = 0.008) and reared with poor farming conditions (PR = 1.13, p = 0.018) they were more likely to be exposed to T. equi. The main ticks found on equids were Amblyomma cajennense and Dermacentor (Anocentor) nitens. The microregions studied are endemic areas for equine theileriosis and there exists enzootic stability for T. equi. Only factors related to the collection area of serum samples influenced the seropositivity of equids for T. equi in that region.
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Publication Date: 2011-10-04 PubMed ID: 21961755DOI: 10.1590/s1984-29612011000300011Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study focuses on determining the prevalence of Theileria equi, a parasite causing disease in horses, in two regions of Rio de Janeiro, Brazil and identifying factors that may influence its occurrence. It’s found that the geographic area, altitude, farming conditions, and birthplace of the horses significantly affect the likelihood of infection.

Background and Objective of the Research

  • The main objective of the research was to determine the prevalence of Theileria equi, a parasite that causes equine piroplasmosis, in two regions (Itaguaí and Serrana) of Rio de Janeiro, Brazil. The study also aimed at identifying factors affecting the prevalence of the parasite among the equine population.

Methodology

  • Researchers collected serum samples from 714 horses in the Itaguaí and Serrana regions.
  • The samples were then tested for the presence of Theileria equi using an indirect fluorescent antibody test with a titer of 1:80.
  • They analyzed various factors including the geographic location, altitude, farming conditions, and the horse’s area of origin to examine their potential relation to seropositivity for T. equi.

Results

  • The results showed an overall prevalence of 81.09% infection from T. equi, with a significantly higher prevalence in Itaguaí (85.43%) compared to the Serrana region (76.92%).
  • The study found several factors significantly influencing the likelihood of T. equi infection. Horses in the Itaguaí region and those living at altitudes below 500m were more likely to be infected.
  • Horses born on the farms and those raised under poor farming conditions were more susceptible to exposure to T. equi.
  • Two types of ticks, Amblyomma cajennense and Dermacentor (Anocentor) nitens, predominantly found on infected horses, suggested a potential vector role in the transmission of T. equi.

Conclusions

  • The research findings indicate that the two regions in Brazil are endemic for equine theileriosis and demonstrate enzootic stability for Theileria equi.
  • It implies that conditions in these regions especially related to the geographical area where serum samples were collected significantly influence T. equi seropositivity among horses.

Cite This Article

APA
Dos Santos TM, Roier EC, Santos HA, Pires MS, Vilela JA, Moraes LM, Almeida FQ, Baldani CD, Machado RZ, Massard CL. (2011). Factors associated to Theileria equi in equids of two microregions from Rio de Janeiro, Brazil. Rev Bras Parasitol Vet, 20(3), 235-241. https://doi.org/10.1590/s1984-29612011000300011

Publication

Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria
ISSN: 1984-2961
NlmUniqueID: 9440482
Country: Brazil
Language: English
Volume: 20
Issue: 3
Pages: 235-241

Researcher Affiliations

Dos Santos, Tiago Marques
  • Curso de Pós-Graduação em Ciências Veterinárias,Universidade Federal Rural do Rio de Janeiro--UFRRJ, BR 465, Km 7, Antiga Estrada Rio-São Paulo, CEP 23890-000, Seropédica--RJ, Brazil. tiagorural@gmail.com
Roier, Erica Cristina Rocha
    Santos, Huarrisson Azevedo
      Pires, Marcus Sandes
        Vilela, Joice Aparecida Rezende
          Moraes, Larissa Martins de Brito
            Almeida, Fernando Queiroz de
              Baldani, Cristiane Divan
                Machado, Rosangela Zacarias
                  Massard, Carlos Luiz

                    MeSH Terms

                    • Animals
                    • Brazil / epidemiology
                    • Equidae / parasitology
                    • Female
                    • Horse Diseases / epidemiology
                    • Horses
                    • Male
                    • Theileriasis / epidemiology

                    Citations

                    This article has been cited 15 times.
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