Detection of Mycoplasma wenyonii and “ Candidatus Mycoplasma haemobos” from Japanese Black breeding cows in Kyushu and Okinawa region, southern part of Japan

The Journal of Veterinary Medical Science

article

Fumio TATSUKAWA¹  Rika NOHARA²  Takako TANIGUCHI²  Akira GOTO³  Naoaki MISAWA²  Hiromu KATAMOTO¹ 

[1] Graduate School of Medicine and Veterinary Medicine, University of Miyazaki;Center for Animal Disease Control, University of Miyazaki;Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine

关键词: Candidatus Mycoplasma haemobos;    Japanese Black breeding cow;    Mycoplasma wenyonii;    Theileria orientalis;   

DOI  :  10.1292/jvms.20-0505

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

This study aimed to elucidate the epidemiological status of hemoplasma infection and investigate the interaction between Theileria orientalis and hemoplasmas in Japanese Black breeding cows raised in the Kyushu and Okinawa regions. Blood samples were collected from 400 cows from 80 different farms in eight prefectures (five samples per farm and 10 farms per prefecture). Mycoplasma wenyonii (Mw), “ Candidatus Mycoplasma haemobos” (CMh), and T. orientalis were examined by polymerase chain reaction (PCR) assay using whole blood samples. PCR results showed that 91.5% (366/400) of cows were positive for bovine hemoplasma: 40.3% were infected with Mw only, 9.5% with CMh only, and 41.8% with both species. T. orientalis was detected in 36% (144/400) of cows. The infection rate of T. orientalis was higher in the grazing group ( P <0.001) than in the housed group, while the rate of CMh infection was higher ( P <0.05) in the housed group than in the grazing group, suggesting that not only the tick but also other arthropod vectors may contribute to hemoplasma transmission. Although the cows with hemoplasma dual infection showed higher ( P <0.05) white blood cell counts compared with hemoplasma-negative cows, there was no difference in hematologic parameters related to the anemia between the hemoplasma-positive and -negative animals. This may indicate that Japanese Black cattle could have resistance to the anemia caused by infection with hemoplasma.

【 授权许可】

Unknown