Alaska Department of Fish and Game, Division of Wildlife Conservation, 1300 College Road, Fairbanks, Alaska 99701-1551, USA.
Alaska Department of Environmental Conservation, Office of the State Veterinarian, 5251 Dr. Martin Luther King, Jr. Avenue, Anchorage, Alaska 99507, USA.
J Wildl Dis. 2022 Jul 1;58(3):625-630. doi: 10.7589/JWD-D-21-00098.
In 2018, Mycoplasma ovipneumoniae was detected in free-ranging caribou (Rangifer tarandus grantii) and Dall's sheep (Ovis dalli dalli) in Alaska, US. Evaluation of additional nasal swabs and archived tissues for M. ovipneumoniae suggested that this bacterium was widespread geographically and temporally in populations of both species. Multilocus sequence typing of four loci identified a single, novel, apparently stable strain type of M. ovipneumoniae in 11 Dall's sheep and 15 caribou in multiple populations across Alaska sampled over a period of 15 yr (2004-19). This strain type differs from those detected to date from wild or domestic sheep (Ovis aries) or goats (Capra aegagrus hircus) tested in Alaska or the lower 48 states. Although the population health implications of this strain are unknown, it has not been associated with population-wide mortality events. The presence of this strain does not decrease the potential risk from the introduction of a pathogenic M. ovipneumoniae strain associated with severe disease in other wildlife populations; therefore, continued monitoring for signs of disease and additional strains is important.
2018 年，美国阿拉斯加的自由放养驯鹿（Rangifer tarandus grantii）和多尔绵羊（Ovis dalli dalli）中检测到绵羊肺炎支原体。对额外的鼻腔拭子和存档组织进行评估表明，这种细菌在这两个物种的种群中具有广泛的地理和时间分布。对四个基因座的多位点序列分型鉴定出，在阿拉斯加多个种群的 11 只多尔绵羊和 15 只驯鹿中，存在一种单一的、新的、显然稳定的绵羊肺炎支原体菌株类型，这些样本是在 15 年期间（2004-2019 年）采集的。这种菌株类型与迄今为止在阿拉斯加或下 48 个州检测到的野生或家养绵羊（Ovis aries）或山羊（Capra aegagrus hircus）中检测到的菌株不同。尽管这种菌株对种群健康的影响尚不清楚，但它与广泛的种群死亡率事件无关。这种菌株的存在并不会降低与其他野生动物种群严重疾病相关的致病性绵羊肺炎支原体菌株引入的潜在风险；因此，继续监测疾病迹象和其他菌株非常重要。
