Resumen

MENDEZ, C et al. Serological screening of Leptospira in wild rodents, bovines, equines and canides in the northeast of Mexico. Rev Salud Anim. [online]. 2013, vol.35, n.1, pp.25-32. ISSN 0253-570X.

Close coexistence of domestic species with wild rodents in modified ecosystems makes relevant the effort to study the role that they may play in the maintenance of different Leptospira serovars. The aim of this study was to define the antileptospiral antibodies distribution in wild rodents and three domestic species that share the same habitat in an endemic area of bovine leptospirosis at the NE Mexico. Antileptospiral antibodies were determined in rodents, bovines, equines and dogs. Using the Microscopic agglutination test, antibodies were identified in the sera of 220 bovines, 24 horses, six dogs and 24 wild rodents. Sera from all the species were assayed against the 12 Leptospira serovars most frequent in Mexico, except those from the rodents which were tittered against only seven (important in these animals). All species reacted against one or more serovars, only 52% of the bovines were positives against: Hardjoprajitno strain H89 (45.5%), Hardjoprajitno (33.1%), Wolffi (28.6%) and Tarassovi (9%); 70.8% of equines were positive against: Tarassovi (41.6%), Hardjoprajitno (29.1%), Wolffi (12.5%) and Hardjoprajitno strain H89 (12.5%). All the dogs were positive against Icterohaemorrhagiae strain Palo Alto, Portland-vere strain Sinaloa and Canicola, and only 66.6% were positive against Icterohaemorrhagiae strain RGA. None of the dogs were positive to the Sejroe serogroup serovars. The seropositivity of the rodents was 50% against the following serovars: Grippotyphosa (14%), Tarassovi (12%), Icterohaemorrhagiae (37%), and Canicola (4%) but negative against Pyrogenes, Wolffi and Hardjoprajitno strain H89. Statistical Cluster, Principal Components and Discriminant Analysis grouped dogs with horses and horses with cattle, with respect to the serovars Hardjoprajitno, Hardjoprajitno H89 strain and Tarassovi. Dogs and rodents were not grouped with the valued serovars associated with cattle.

Palabras clave : Leptospira; antileptospiral antibodies; rodents; bovines; equines; canines.

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