@article{oai:rakuno.repo.nii.ac.jp:00005609,
 author = {髙橋, 俊彦 and 北野, 菜奈 and 加藤, 敏英 and 樋口, 豪紀 and 井上, 誠司},
 issue = {2},
 journal = {酪農学園大学紀要. 自然科学編},
 month = {Mar},
 note = {Bulletin, This survey investigated the nationwide infiltration status of 4 species related to bovine respiratory disease complex (BRDC): Mycoplasma bovis (M. bovis), Mannheimia haemolytica (M. haemolytica), Pasteurella multocida (P. multocida), and Histophilus somni (H. somni). We conducted a survey of Hokkaido and four other prefectures south of it (Yamagata, Shizuoka, Shiga, and Nagasaki) in Japan. We tested 120 clinically healthy calves in September 2014 (80 in Hokkaido and 40 in the other prefectures) and 111 clinically healthy calves (45±12 days old; 71 in Hokkaido and 40 in the other areas) in March 2015. In September, the number of infected calves in Hokkaido was 35/80 (43. 8%), whereas in the other, more southerly, prefectures it was 11/40 (27.5%). In March, 33 of the 71 calves in Hokkaido (46.5%) were found to be infected, whereas only 4 of the 40 (10.0%) were in the other areas. Thus the rate of infection was significantly higher (p ＜0.01) in Hokkaido in March, with the rates for M. bovis (17/71: 23.9%) and M. haemolytica (9/71: 12.7%) also significantly higher in Hokkaido (p ＜0.05) than further south, where they were 2/40 (5.0 %) and 0/40 (0.0%), respectively. P. multocida was found in 29 of the 80 calves in Hokkaido 29/80 (36.3%) in September, and in 5 of the 40 (12.5%) in the other prefectures, with the rate being significantly (p ＜0.01) higher in Hokkaido. Thus, in Hokkaido, the possibility of occurrence of BRDC seemed to be higher than that in more southerly areas as the prevalence of colonization was higher. Since the prevalence of colonization was high in March in Hokkaido and in September in the more southern areas, it seems necessary to take measures to ensure a breeding environment that limits cold stress in Hokkaido and heat stress in the south. In addition, in Hokkaido, the colonization rate for P. multocida and the bacterial isolation rates were higher than in the south, particularly during September, whereas the isolation rates for M. bovis and M. haemolytica were significantly higher in March. It is considered important to prevent BRDC via appropriate sanitation management and by reducing stress.},
 pages = {61--67},
 title = {日本における牛呼吸器感染症に関わる細菌の浸潤調査},
 volume = {43},
 year = {2019}
}