Lack of Exposure to Mycobacterium bovis and Mycobacterium avium subsp. paratuberculosis in Chilean Cervids, and Evidence of a New Mycobacterium-Like Sequence

Abstract

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High Exposure to Livestock Pathogens in Southern Pudu (Pudu puda) from Chile

“…There are only two previous reports of seroprevalence for infectious agents in wild cervids in Chile [63,68], although with small sample sizes per species (<30) that are lower than those of the present study. Therefore, for pathogens with a low true prevalence, it is difficult to detect at least one infected individual in a population, which may be influencing the results [69,70].…”

“…Further, no prior evidence of these viruses in the country has been reported, and only recently were mortality episodes caused by EHDV reported in cervids in Latin America in Brazil [127]. Likewise, it is also expected that no evidence of exposure will be detected for some livestock and zoonotic pathogens, such as Brucella abortus and Mycobacterium bovis, which have a very low prevalence in the country in their host reservoir, cattle, thanks to the governmental programs for control and eradication [36,68]. Our results for M. bovis are similar to those reported through molecular screening of feces and serology for free-ranging pudus and huemul, where they found no evidence of infection throughout their entire distribution [68].…”

“…Likewise, it is also expected that no evidence of exposure will be detected for some livestock and zoonotic pathogens, such as Brucella abortus and Mycobacterium bovis, which have a very low prevalence in the country in their host reservoir, cattle, thanks to the governmental programs for control and eradication [36,68]. Our results for M. bovis are similar to those reported through molecular screening of feces and serology for free-ranging pudus and huemul, where they found no evidence of infection throughout their entire distribution [68]. No evidence of exposure to Bovine Herpesvirus 1 was found in pudus, which is similar to what was reported in huemul [63], but different from studies developed in Europe, where this agent has been reported frequently in serological studies in free-ranging and captive cervids [141].…”