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Frequency and risk factors for toxoplasmosis in ovines of various regions of the State of Colima, Mexico

Published online by Cambridge University Press:  19 September 2008

H. CABALLERO-ORTEGA
Affiliation:
Laboratorio de Inmunología Experimental, Instituto Nacional de Pediatría. Secretaría de Salud. México DF, México
J. M. PALMA
Affiliation:
Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima, México Centro Universitario de Investigación y Desarrollo Agropecuario, Colima, México
L. J. GARCÍA-MÁRQUEZ
Affiliation:
Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima, México Centro Universitario de Investigación y Desarrollo Agropecuario, Colima, México
A. GILDO-CÁRDENAS
Affiliation:
Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima, México
D. CORREA*
Affiliation:
Laboratorio de Inmunología Experimental, Instituto Nacional de Pediatría. Secretaría de Salud. México DF, México
*
*Corresponding author: Laboratorio de Inmunología Experimental, Torre de Investigación, 3er piso, Instituto Nacional de Pediatría, Insurgentes Sur, 3700-C, México, D.F., C.P. 04530, México. Tel: +52 55 10 84 09 00 Ext. 1439. Fax: +52 55 10 84 38 83. E-mail: [email protected] or [email protected]

Summary

Infection of ewes by Toxoplasma gondii may induce abortions, thus it has consequences for sheep production. Colima, Western State of Mexico, has favourable climatic conditions for transmission and both domestic and wild cats live there. The aim of this study was to determine the frequency of specific antibodies in sheep from the coast, a mountain, and a hill of Colima. Serum samples from 351 sheep were tested by a previously standardized indirect ELISA. The frequency of infection was estimated and the farm location and flock size, as well as the animals' age and sex were analysed as risk factors for toxoplasmosis. The frequency of antibodies depended on the altitude, being higher at sea level than at 1200 metres above sea level (OR=3·77, 95% CI=1·79–7·94, P<0·0001), and the size of the flock, being higher in the large ones (OR=2·23, 95% CI=1·35–3·71, P=0·002). Older animals were more frequently positive and with a stronger response than young ones (OR=1·77, 95% CI=1·07–2·93, P=0·016). No differences were observed between male and female sheep. In conclusion, toxoplasmosis is present in sheep of Colima with variations related to altitude, flock size and age.

Type
Original Articles
Copyright
Copyright © 2008 Cambridge University Press

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