鸭“白点病”(暂定名)病原学研究

Etiology of"White Spot Disease"in Duck(named tentatively)

对 3个“白点病”(暂定名 )发病严重的鸭场的病死鸭进行细菌学检查均为阴性 ,但均分离到病毒。对其中 1株病毒进行了鉴定。负染及超薄切片电镜观察 ,可见呈球形或卵圆形、直径 80～ 2 30 nm、有囊膜的病毒。经理化特性、生物学特性及核酸类型测定 ,确定该病毒为疱疹病毒科成员。血清中和试验表明 ,该病毒与鸭瘟病毒、鸭疱疹病毒 型无血清学相关性 ,故暂定名为鸭疱疹病毒 型。人工感染试验复制出与自然感染病死鸭相同的病变 ,初步证明该病毒为鸭“白点病”

A new infectious disease characterized by high morbidity,high mortality,weak foot, head stringing,lots of white necroticspots in liver,spleen,pancreasand kidney and enterohemorrhagia occurred in Fujian,Zhejiang and Guandong provinces Since1 998.Etiological study of the diseased ducks was carried out.Three strains of viruses were isolated from thelivers and spleensof the diseased ducks of three duck farms,one of which was to be identified.On the basis of its morphology,size, chemophysical and biological characters and nucleic acid type,the virus with envelop,sphere in mor- phology and80 -2 3 0 nm in diameter was categorized into herpesviridae.It was named tentatively as duck herpesvirus type because of its serological differences from duck plague virus and duck her- pesvirus type .The results of experimental inoculation tests showed preliminarily that duck white spotdisease( named tentatively) is caused by this virus.This is firstreported.