2018 Volume 71 Issue 8 Pages 431-436
Bovine respiratory disease's morbidity and treatment of fatting cattle introduced from the market was investigated. Four hundred-eight head cattle were introduced from 2011 to 2013. Sixty-four heads were treated in two weeks from the introduction. The onset tendency was recognized in winter and the days that led to the onset were short in spring. Bacterial analysis was conducted using bronchoalveolar lavage, tracheal lavage and nasal swab. Pasteurella multocida (Pm ) was detected in one non-febrile steer, with a cough and runny nose (control group), Mannheimia haemolytica (Mh ), Pm, or Histophilus somni were detected in all febrile steers (fever group) in December 2013. Pm was detected in one steer in the control group, and Pm or Mh was detected in the fever group in March 2014. Mycoplasma spp. was not detected all cattle. These results demonstrate that the origin of pneumonia bacteria is present in the bronchoalveolar lavage region. It is important to prevent and treat steers introduced from the market.
