Estudio serológico de Neospora caninum en ganado de leche del altiplano Norte de Antioquia, Colombia

Abstract

Objectives. To determine Neospora caninum seroprevalence in nonvaccinated dairy cattle from the Northern plains of Antioquia. Materials and methods. A cross-sectional study was conducted to determine the prevalence of neosporosis in a major dairy area of Colombia. Blood samples were collected from 1003 dairy cattle in 29 herds located in the municipality of San Pedro de los Milagros, in Antioquia. N. caninum antibody levels were measured by an enzymatic immunoassay (ELISA) and the results classified as positive or negative. Results. Seropositive cattle were observed in all herds, with a prevalence ranging from 7 to 97% and a mean (±S.E) of 37.1% (±4.2). The distribution of seropositive animals by age groups of <1, 1-2, 2-3 and ≥3 years old was 25.5, 30.3, 46.1 and 39.1%, respectively. Conclusions. There is a high seroprevalence of N. caninum in the main dairy cattle area of Antioquia. The large variation among herds suggests the presence of mayor risk factors whose identification would be essential to establish control programs. Considering that any seropositive cow has a greater risk to abort than uninfected mates, future studies should address the epidemiology of abortions that can be attributed to neosporosis and the type of control strategies that could be implemented.

Diagnóstico Serológico de Neospora caninum en vacas del municipio de Tuta, Boyacá

“…Por otro lado, la Federación Colombiana de Ganaderos y el Fondo Nacional del Ganado (2005Ganado ( -2009 recolectaron y consolidaron la información asociada a los resultados de diagnóstico de las enfermedades del complejo reproductivo, destacándose la Neosporosis bovina con una seropositividad del 37% (Álvarez-Soto et al 2016). Finalmente, Chaparro et al (2016) determinaron la seroprevalencia de N. caninum en ganado lechero sin vacunar del altiplano Norte de Antioquia, allí se identificaron bovinos seropositivos en todos los hatos con seroprevalencia del 37,1%.…”

“…Sin embargo, en Colombia no se dispone de estimaciones reales acerca de las pérdidas económicas por N. caninum, si bien ya se han desarrollado mapas epidemiológicos regionales en los que se han encontrado frecuencias que varían de acuerdo con la zona muestreada. Hasta ahora, los únicos informes que documentan la presencia de N. caninum en bovinos se basan en pruebas serológicas y las asociaciones con problemas reproductivos como abortos se han estudiado desde hace poco tiempo (Chaparro et al 2016). Adicionalmente, si bien es cierto que el número de muestras analizadas en algunas regiones es bastante limitado, la información obtenida es alarmante con respecto a la neosporosis bovina.…”

Gestational monitoring in buffalo females: detection of Neospora caninum by PCR

“…This postulate has been recently ratified in a study carried out in Mexico, which reported high seropositivity when the two bovine species coexist closely (Reyes-Sandoval et al, 2021), thus corroborating our study. Internationally there's has been highly variable reports on anti-Neospora antibodies in cattle, for instance from 2.8% in Nigeria's autochthonous breeds (Ayinmode and Akanbi, 2013) to 28.6% or 37% in South America [Moore et al (2014) and Chaparro et al (2017) respectively]. In general, this variation is depending on the region, the type of cattle involved, and the diagnostic test used.…”