| partial protection against challenge with the highly pathogenic h5n1 influenza virus isolated in japan in chickens infected with the h9n2 influenza virus. | the protective effect of the a/ck/yoko/aq55/01 (h9n2) avian influenza virus against the highly pathogenic h5n1 virus, i.e., a/ck/yama/7/04 (genotype v), was examined. three 5-week-old chickens were inoculated intranasally with the h9n2 virus (10(8.6) eid(50)/head) and were kept with two contact chickens. all of the infected chickens were reinoculated with the same virus at 20 weeks of age, and 10 days later, they were challenged intranasally with the h5n1 virus (10(4.0) eid(50)/head). five chick ... | 2007 | 17426917 |
| characterization of ornithobacterium rhinotracheale from commercial layer chickens in eastern japan. | from a total of 72 commercial layer and pullet farms that were monitored in the eastern japan area, 4 farms had mild to severe respiratory disease accompanied by decreased feed intake and drop in egg production. microbiological analysis showed that 3 of the 4 farms, particularly from fukushima, tochigi, and ibaraki prefectures, were positive for ornithobacterum rhinotracheale (ort). out of 65 birds examined, ort was isolated in 21 birds (32.31%). all isolates were gram-negative pleomorphic rods ... | 2018 | 29077917 |