Sacco R E, Saif Y M, Nestor K E, Anthony N B, Emmerson D A, Dearth R N
Department of Poultry Science, Ohio State University, Wooster 44691.
Avian Dis. 1991 Oct-Dec;35(4):950-4.
Six hundred fifty-five male and female turkeys representing four genetic lines were challenged in 10 experiments over a 3-year period with a field isolate of Pasteurella multocida. Poults were challenged at 45 days of age with 1 ml of an inoculum containing 1.2 x 10(7) bacteria per ml. The lines of turkeys included two randombred control lines (RBC1 and RBC2), a subline (E) of RBC1 selected for increased egg production, and a subline (F) of RBC2 selected for increased 16-week body weight. The number of days from exposure to severe clinical signs or death for Line F (5.8 days) differed significantly from that of Line E (8.2 days), Line RBC1 (8.0 days), and Line RBC2 (8.2 days). There were no significant differences due to sex of poult for number of days from exposure to severe clinical signs or death. Overall mortality observed was 51.2%. Mortality was highest for Line F (72.1%) and differed significantly from that of the other lines. Mortality among male poults did not differ significantly from mortality among female poults.
在3年时间里进行的10项实验中，用多杀巴斯德菌的一株野外分离株对代表4个遗传品系的655只雌雄火鸡进行了攻毒试验。幼雏在45日龄时用1毫升接种物进行攻毒，每毫升接种物含1.2×10⁷个细菌。火鸡品系包括两个随机交配对照品系（RBC1和RBC2）、为提高产蛋量而选择的RBC1的一个亚系（E）以及为提高16周龄体重而选择的RBC2的一个亚系（F）。F品系从接触到出现严重临床症状或死亡的天数（5.8天）与E品系（8.2天）、RBC1品系（8.0天）和RBC2品系（8.2天）有显著差异。从接触到出现严重临床症状或死亡的天数在幼雏性别上没有显著差异。观察到的总体死亡率为51.2%。F品系的死亡率最高（72.1%），与其他品系有显著差异。雄性幼雏的死亡率与雌性幼雏的死亡率没有显著差异。
