59.一般家畜化膿性支氣管肺炎最常發生的病變特徵為何?
(A)cranioventral distribution
(B)multifocal distribution
(C)diffuse distribution
(D)locally extensive dorsocaudal distribution
37.下列何者在豬會引起間質性肺炎,但對支氣管並無影響?
(A)Streptococcus suis type II (B)porcine reproductive and respiratory syndrome virus (C)Actinobacillus pleuropneumoniae (D)Mycoplasma hyopneumoniae