Ovine trypanosomosis: a seroepidemiological survey in coastal Guyana
Revue Elev Med Vet Pays Trop
; 46(1/2): 57-9, 1993.
Artigo
em Inglês
| MedCarib
| ID: med-7151
Biblioteca responsável:
JM3.1
Localização: JM3.1; Reprint Collection
ABSTRACT
The objective of this study was to determine the seroprevalence rates of Trypanosoma vivax and Trypanosoma evansi in sheep in coastal Guyana. Blood samples were taken from a systematic random sample of one hundred and ninety-three (193) sheep on twenty-two (22) farms in Region 5, Mahaica/Berbice, a coastal area of Guyana. Age, breed, sex, and farm of origin were recorded for all sampled sheep. One hundred and seventy-six (176) serum samples were submitted for Indirect Fluorescent Antibody (IFA) testing for T. vivax and T. evansi. Fluorescence was graded as 0 (negative), 1+(very weak), 2+(weak), 3+(strong) or 4+(very strong), as measured at 1160 dilution of serum. Samples were considered to be sero-positive if any fluorescence was observed. Indirect Fluorescent Antibody results were received for one hundred and sixty-one (161) samples. One hundred and three (64 percent) sera were sero-positive for Trypanosoma sp. Of these, 38 (23.6 percent) sera were positive to T. evansi only, 11(6.8 percent) were positive to T. vivax only and 54 (33.5 percent) were positive for both. As cross reactions occur between T. vivax and T. evansi, it was difficult to determine the true species of exposure for the sera which tested positive to both species. The overall sero-prevalence rate of 64 percent suggests that trypanosomosis is endemic in sheep in coastal Guyana. This was the first serological evidence of T. evansi in Guyana. Although T. vivax is believed to be pathogenic in sheep, the clinical siginficance of T. evansi remains unknown. The vector of both species of trypansomes in sheep on the north of South America also is not known (AU)
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Coleções:
Bases de dados internacionais
Contexto em Saúde:
Doenças Negligenciadas
Problema de saúde:
Tripanossomíase
Base de dados:
MedCarib
Assunto principal:
Doenças dos Ovinos
/
Tripanossomíase
/
Trypanosoma vivax
Tipo de estudo:
Estudo diagnóstico
/
Fatores de risco
País/Região como assunto:
América do Sul
/
Caribe Inglês
/
Guiana
Idioma:
Inglês
Revista:
Revue Elev Med Vet Pays Trop
Ano de publicação:
1993
Tipo de documento:
Artigo