The Seroprevalence of Equine Trypanosomosis in the Pantanal

Dávila, Alberto M. R.; Souza, Sindoval Silva de; Campos, Cristiane Meldau de; Silva, Roberto Aguilar M. S.

doi:10.1590/s0074-02761999000200014

Cited by 17 publications

(8 citation statements)

References 9 publications

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“…Regarding Trypanosoma spp., the ELISA technique had an antibody prevalence of 50.4%, which was lower than the prevalence observed by Dávila et al (15) in a study in Pantanal, Mato Grosso do Sul, in which a prevalence of 79.2% was observed. When analyzed by RIFI, the samples had a prevalence of 18.84%, which was also lower than the prevalence found by Herrera et al (16) , who observed "Baixadeiros" horses: prevalence of anti-Trypanosoma spp.…”

Section: Discussioncontrasting

confidence: 67%

"BAIXADEIROS" HORSES: PREVALENCE OF ANTI-Trypanosoma spp. AND ANTI-Leishmania spp. ANTIBODIES

et al. 2018

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A total of 138 horse blood samples were collected from 2012 to 2013 for the subsequent separation of serum collection. For detection of anti-Leishmania spp. and anti-Trypanosoma spp. antibodies, indirect immunofluorescence reactions and immunoenzymatic assays were performed. Samples with titers ≥40 were considered positive in the indirect immunofluorescence (IFAT), and the cut off for the enzyme immunoassay (ELISA) was calculated with three standard deviations. When tested for Trypanosoma spp., 50.37% (68/135) of the samples were ELISA reagents, 18.84% (8/136) were positive for IFAT and 2.89% (4/138) for both tests. A significant statistical association was observed for the municipality (p = 0.013) and collection period (p = 0.042) in the ELISA. When tested for Leishmania spp., 25.4% (35/138) of the samples were ELISA reagents, 13.00% (18/138) were positive for the IFAT and 4.34% (6/138) were positive for two tests, there were no variables associated with seropositivity. A statistical association (p = 0.0034) was observed between the presence of anti-Trypanosoma spp. and anti-Leishmania spp. antibodies when the ELISA was used. The results suggest that this horse breed is in contact with leishmaniasis and trypanosomiasis, which demonstrates the need for a more accurate investigation into the real role of horses in these diseases to assist in disease control measures.

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Section: Discussioncontrasting

confidence: 67%

"BAIXADEIROS" HORSES: PREVALENCE OF ANTI-Trypanosoma spp. AND ANTI-Leishmania spp. ANTIBODIES

et al. 2018

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“…Also, the higher number of tabanid species near the beginning and the end of the rainy period was similar to that reported for the Oriental Amazon (Gorayeb 1993). The high abundance of most tabanid species during the rainy season, particularly those potentially important as mechanical vectors (such as T. importunus), may explain the outbreaks of equine trypanosomosis (Trypanosoma evansi) as well as the temporal variation of T. evansi seroprevalence in equines previously reported in the Pantanal (Silva et al 1995, Dávila et al 1999. A seasonal sucession of the most abundant species was observed and may be associated with a strategy to reduce interspecific competition (Rafael 1982).…”

Section: Discussionmentioning

confidence: 82%

Seasonality and relative abundance of Tabanidae (Diptera) captured on horses in the Pantanal, Brazil

Barros

2001

Mem. Inst. Oswaldo Cruz

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“…Sporadic outbreaks in horses occur in the different sub‐regions, but some areas are believed to be T. evansi‐free . 76,77 According to Seidl et al , 78 the estimated total cost of T. evansi to the Pantanal region cattle ranchers is about US$2.4 million and 6,462 per year.…”

Section: Current Statusmentioning

confidence: 99%

Animal Trypanosomiasis in South America: Current Status, Partnership, and Information Technology

Dávila

Silva²

2000

Annals of the New York Academy of Sciences

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Animal trypanosome species of economical importance in South America include T. vivax and T. evansi. Both species are described in Brazil, Bolivia, Colombia, French Guyana, Peru, Suriname, and Venezuela. In Argentina and Guyana, only T. evansi and T. vivax are found, respectively. Our studies on T. vivax indicated that the parasite was spreading around 1.3 km per day in Bolivia. We found severe leukopenia in bovines from Pantanal (Brazil) and the Department of Santa Cruz (Bolivia). Because it can cause immunosupression, the importance of trypanosomiasis control in ensuring success of vaccination campaigns against foot and mouth disease (FMD) in the Pantanal and Bolivia should be considered. The use of one needle for several animals during FMD campaigns in Brazil and Bolivia could also contribute to the spread of T. vivax. The anticipated losses due to T. vivax could exceed $160 million, assuming there are 11 million head of cattle in the Brazilian Pantanal and Bolivian lowlands. International collaboration among research institutes is needed to deal with these diseases and parasites. Previous efforts using information technologies resulted in the creation of two discussion lists (Tryplink and Trypan), the edition of the on‐line version of Trypnews and Internet conferences.

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The Seroprevalence of Equine Trypanosomosis in the Pantanal

Abstract: Since little information is available on the epizootiological status of Trypanosoma evansi in SouthAmerica and particularly Brazil, we evaluated equine serum samples collected in 1993, 1994, 1995 and 1997

Cited by 17 publications

References 9 publications

"BAIXADEIROS" HORSES: PREVALENCE OF ANTI-Trypanosoma spp. AND ANTI-Leishmania spp. ANTIBODIES

"BAIXADEIROS" HORSES: PREVALENCE OF ANTI-Trypanosoma spp. AND ANTI-Leishmania spp. ANTIBODIES

Seasonality and relative abundance of Tabanidae (Diptera) captured on horses in the Pantanal, Brazil

Animal Trypanosomiasis in South America: Current Status, Partnership, and Information Technology

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