E-ISSN 2223-0343

Seroprevalence of paratuberculosis in sheep of Nayarit, Mexico

Karina Mejía Martínez1, Clemente Lemus Flores2*, Carlos González-Morteo2, Gabriela Palomares Resendiz3, Efrén Díaz Aparicio3 and Juan Carlos Segura Correa

1Estudiante de doctorado en el posgrado en Ciencias Biológico Agropecuarias, Unidad Académica de Agricultura, Universidad Autónoma de Nayarit, México; 2Posgrado en Ciencias Biológico Agropecuarias, Unidad Académica de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Nayarit, México; 3Centro Nacional de Investigaciones Disciplinarias en Microbiología Veterinaria, INIFAP, Carretera libre México - Toluca Km 15.5, Col. Palo Alto, Cuajimalpa 05110, México, D.F.; 4Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán


Paratuberculosis is a disease caused by Mycobacterium avium subsp. paratuberculosis (MAP). In domestic ruminants, MAP infection is largely sub-clinical, but can result in chronic diarrhea leading to emaciation and death. A survey of MAP was carried out in a non-vaccinated sheep population from Nayarit, México to estimate seroprevalence and histopathological findings. The aim was also to estimate the intra-herd correlation (re) and design effect (D) of MAP seropositivity and to determine the association of the disease with some animal-level risk factors. Serum samples from 368 sheep older than 2 years in 38 herds were evaluated using an indirect ELISA assay. Eleven of the 38 herds had at least one seropositive animal and 19 animals with a total of 368 tested positive for MAP (5.6%). The histological alterations found were characterized by enteritis and granulomatous lymphadenitis indicating that the death of the animal was caused by MAP infection.

Keywords: Mycobacterium avium subspecies paratuberculosis; histopathology; ELISA
To cite this article: Martínez KM, CL Flores, C González-Morteo, GP Resendiz, ED Aparicio and JCS Correa, 2015. Seroprevalence of paratuberculosis in sheep of Nayarit, Mexico. Res. Opin. Anim. Vet. Sci., 5(12): 494-498.

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