Spatial and environmental analysis of Mycobacterium avium infected dairies in Antioquía (Colombia)

Autores/as

  • N. M. Correa Universidad Nacional del Nordeste
  • M. J. Badel Skandha EIT SAS
  • J. A. Fernández Escuela de Medicina Veterinaria, Facultad de Ciencias Agrarias, Universidad de Antioquia, Medellín, Colombia

DOI:

https://doi.org/10.30972/vet.3225724

Palabras clave:

Environment, geostatistics, johne’s disease, rainfall, surface temperature, vegetation cover

Resumen

The present study aimed to describe the spatial distribution of Mycobacterium avium subsp. paratuberculosis (MAP) in dairy herds, and to detail environmental variables taken as refer- ence of the physical background of the study area, specifically those related to MAP-qPCR positive herds located in six municipalities of the northern region of the Province of Antioquia (Colombia), based on environmental sampling and qPCR analysis. The study herds (n = 386) were located in 63 different districts from six municipalities. Participant herds were visited once between June and October (2016) to collect an environmental sample, and iden- tification of MAP was achieved using a duplex quantitative real-time PCR method. Rainfall trends, day and nighttime surface temperature, and vegetation cover index were taken as environmental references of the physical background of the study area. In addition, distribution maps of MAP-qPCR positive and negative herds, as well as maps of temperature variations and vegetation cover, were constructed. As a result, there was an increase in MAP-positive herds in the North-West, South, and Southeast of the study area. An overall high rainfall regime was found and day- and nighttime surface temperatures showed important variations during sampling months. No evidence of management of the vegetation cover was found, in both pastures and areas with native vegetation, except for a conservancy area. In conclusion, the general environmental conditions, where the detection of MAP-positive herds is most likely to happen, were reported herein, considering approaches using the same (or a very ap- proximate) sample collection and handling, and molecular detection method.


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Publicado

2021-12-01

Cómo citar

Correa, N. M., Badel, M. J., & Fernández, J. A. (2021). Spatial and environmental analysis of Mycobacterium avium infected dairies in Antioquía (Colombia). Revista Veterinaria, 32(2), 155–163. https://doi.org/10.30972/vet.3225724

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