Gingerich E N, Winterfield R W, Fadly A M
Poult Sci. 1976 Jul;55(4):1482-5. doi: 10.3382/ps.0551482.
Infectious bronchitis virus (IBV) associated with a catarrhal tracheitis, sudden decline in egg production, and reduced shell quality was isolated from an Indiana White Leghorn breeder flock. It was found to be serologically different from Massachusetts, Connecticut, Iowa 97, Iowa 609, Florida, Arkansas 99, JMK, Holte, Gray and SE 17 IBV serotypes. Two different Massachusetts vaccine strains protected chickens from respiratory signs but not against virus infection using the isolant for challenge in laboratory trials. The isolant was passed through a 0.22 mu. filter. It was heat (56 C), acid pH (3.0), ether and chloroform labile. In embryos it produced deaths or lesions of infectious bronchitis in one to five days after inoculation. It is suggested that this IBV isolant be designated Indiana-type.
从印第安纳州的一个白来航种鸡群中分离出一种与卡他性气管炎、产蛋量突然下降和蛋壳质量降低相关的传染性支气管炎病毒（IBV）。发现它在血清学上与马萨诸塞州、康涅狄格州、爱荷华州97、爱荷华州609、佛罗里达州、阿肯色州99、JMK、霍尔特、格雷和SE 17 IBV血清型不同。在实验室试验中，两种不同的马萨诸塞州疫苗株可保护鸡免受呼吸道症状影响，但不能抵抗使用分离株进行攻毒的病毒感染。该分离株通过0.22微米的过滤器。它对热（56℃）、酸性pH值（3.0）、乙醚和氯仿不稳定。在胚胎中，接种后1至5天会产生传染性支气管炎的死亡或病变。建议将这种IBV分离株命名为印第安纳型。
