Aim: The research was conducted to determine the seroprevalence and risk factor associated with respiratory viral pathogens in dual-purpose cattle of Aguachica, Rio de Oro and La Gloria municipalities in Cesar department, Colombia. Materials and Methods: The seroprevalence study was done from the random sampling (n=1000) of blood collected from 29 dual-purpose herds, located in three municipalities (Aguachica, Rio de Oro, and La Gloria) of Cesar department. The presence of antibodies against bovine herpesvirus type 1 (BHV-1), bovine respiratory syncytial virus (BRSV), bovine viral diarrhea virus (BVDV), and bovine parainfluenza-3 virus (BPI-3V) in the samples was detected by indirect enzyme-linked immunosorbent assay. Epidemiological data were obtained using a questionnaire administered to the owner or manager of each herd. Results: The overall highest seroprevalence was observed for BHV-1 (94.7%), followed by BRSV (98.6%), BVDV (35.2%), and BPI-3V (47.1%). Regarding the seroprevalence by municipalities, there was a statistical association (p<0.05) for BVDV; however, for BRSV, BHV-1, and BPI-3V, no statistical association was found (p>0.05) between seropositive values and the municipalities, indicating that animal was seropositive in similar proportions in the three municipalities. Female sex and older animals (>24 months) were a significant risk factor for BHV-1 and BPI-3V infection. Regarding the clinical signs, there was a statistical association (p<0.05) between the seropositive values of BVDV and most of clinical signs observed, except for abortion. Conclusion: This research confirms the high seroprevalence of the respiratory viral pathogens in nonvaccinated cattle within the study areas. Therefore, appropriate sanitary management practices and routine vaccination programs should be adopted to reduce the seroprevalence of these infectious agents.

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El estudio tuvo como objetivo determinar la prevalencia de Toxoplasma gondii y Mycoplasma agalactiae en ovinos y caprinos del sur de La Guajira y norte del Cesar como parte del establecimiento de un perfil serológico de estas especies animales en la región colombiana. Las muestras de suero (n=1039) fueron analizadas con kits comerciales de ELISA específicos para estos dos patógenos. La prevalencia global encontrada en la región fue del 25.1 y 18.3% para T. gondii y de 0.12 y 0.8% para M. agalactiae, en ovinos y caprinos, respectivamente. Muestras positivas a T. gondii fueron más frecuentes en hembras que en machos. Asimismo, todas las muestras positivas a M. agalactiae fueron determinadas en hembras.

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