Orthobunyaviruses, a Common Cause of Infection of Livestock in the Yucatan Peninsula of Mexico

Abstract

Abstract. To determine the seroprevalence of selected orthobunyaviruses in livestock in the Yucatan Peninsula of Mexico, a serologic investigation was performed using serum samples from 256 domestic animals (182 horses, 31 sheep, 1 dog, 37 chickens, and 5 turkeys). All serum samples were examined by plaque reduction neutralization test using Cache Valley virus (CVV), Cholul virus (CHLV), South River virus (SOURV), Kairi virus, Maguari virus, and Wyeomyia virus. Of the 182 horses, 60 (33.0%) were seropositive for CHLV, 48 (26.4%) were seropositive for CVV, 1 (0.5%) was seropositive for SOURV, 60 (33.0%) had antibodies to an undetermined orthobunyavirus, and 13 (7.1%) were negative for orthobunyavirus-specific antibody. Of the 31 sheep, 6 (19.3%) were seropositive for CHLV, 3 (9.7%) were seropositive for CVV, 4 (12.9%) were seropositive for SOURV, 16 (51.6%) had antibodies to an undetermined orthobunyavirus, and 2 (6.5%) were negative for orthobunyavirus-specific antibody. The single dog was seropositive for SOURV. Four (11%) chickens had antibodies to an undetermined orthobunyavirus, and 1 (20%) turkey was seropositive for CHLV. These data indicate that orthobunyaviruses commonly infect livestock in the Yucatan Peninsula.

Management Factors Associated with Operation-Level Prevalence of Antibodies to Cache Valley Virus and Other Bunyamwera Serogroup Viruses in Sheep in the United States

“…Another explanation is that an unrecognized BUN serogroup virus occurs in the United States. Similar to our observations, a high proportion of sheep and horses in the Yucatan Peninsula of Mexico in 2007-2008 were shown to have antibodies to an undetermined BUN serogroup virus (Blitvich et al 2012b). have provided some insight into the antibody responses in vertebrates challenged sequentially with different BUN serogroup viruses.…”

“…Nevertheless, we provide compelling evidence that BUN serogroup viruses commonly infect sheep in the United States. Other serological investigations have also estimated the seroprevalence of BUN serogroup viruses in North American sheep, although these studies were performed with much smaller sample populations (Buescher et al 1970, Crandell et al, 1989, Chung et al 1991, Blitvich et al 2012b).…”

Emerging mosquito-borne bunyaviruses in Canada

“…Similar to the Jamestown Canyon virus, its main animal reservoir / amplifying host is believed to be deer (15,16). The Cache Valley virus was first isolated in 1956 in Cache Valley, Utah, USA but is endemic throughout Canada, the United States, the Caribbean, Mexico and Argentina (15,28,29). …”

Bunyavirus transmis par les moustiques émergents au Canada

“…Comme pour le virus de Jamestown Canyon, on pense que son principal réservoir animal ou hôte amplificateur est le cerf (15,16). Le virus de Cache Valley a été isolé pour la première fois en 1956 à Cache Valley, dans l'Utah, aux États-Unis, mais il est endémique dans tout le Canada, les États-Unis, les Caraïbes, le Mexique et l'Argentine (15,28,29). Bien que le virus de Cache Valley puisse infecter les humains ainsi qu'un large éventail d'animaux de bétail, la maladie clinique a été principalement observée chez les moutons (15).…”