关键词: 鼠疫耶尔森菌, 宿主动物, 鼠类, 种群

Abstract:

Objective To investigate the community structure and density of small mammals in the natural environment in Mentougou district of Beijing, China and to detect the infection with Yersinia pestis in the mammals. Methods The surveillance was conducted from 2009 to 2011. Small mammals were captured by trap-at-night method. The rodent species were identified, and the capture rate was calculated. Living rodents were captured by cage-trap method, and blood samples were collected from the heart for detection of F1 antibody of Y. pestis. Results A total of 315 small mammals (7 species) were captured in Mentougou district from 2009 to 2011, including 309 mammals (6 species) of the order Rodentia and 6 mammals (1 species) of the order Insectivora. The capture rates of small mammals were 16.60%, 4.62%, and 15.08%, respectively for different year. The three species of rodents with the highest capture rate and constituent ratio were Apodemus peninsulae, Niviventer confucianus, and A. agrarius; the total proportions of the three rodents were 95.18%, 88.89%, and 96.84% from 2009 to 2011. In the serological detection, no Y. pestis F1 antibody was found in 49 blood samples. Conclusion No infection of Y. pestis has been found by serological detection in rodents in Mentougou district of Beijing, and there is no natural foci of plague in this area.

Key words: Yersinia pestis, Host animal, Rodent, Species