問題詳情

30.下列何者感染會造成雞睪丸炎,致使受精率嚴重下降?
(A)Newcastle disease virus
(B)Infectious bronchitis virus
(C)Mycoplasma gallisepticum
(D)Escherichia coli

參考答案

答案:C
難度:適中0.525714
統計:A(25),B(42),C(92),D(16),E(0)

用户評論

終於.......】評論

Some major clinical signs of M. gallisepticum in chickens include those of respiratory distress such as coughing, sneezing, slight to marked rales, and difficulty breathing.[7] Swollen eyelids, ocular discharge, and loss of sight are signs and symptoms that are very important for this disease as well.[5] Poor productivity, leg problems, nasal discharge, stunting, inappetence, slow growth, reduced hatchability, reduced chick viability, and abnormal feathers are also some relevant clinical signs of the disease.[8] M. gallisepticum infections in chickens result in relatively mild catarrha...