1981 Cilt 1 Sayı 1

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    Newcastle hastalığı virulans- hastalık şekilleri- teşhis ve hastalıkla savaş
    (Uludağ Üniversitesi, 1981) Minbay, Ahmet; Veteriner Fakültesi; Kliniğe Hazırlık Bilimleri Bölümü
    Newcastle disease viruses isolated from different cases uary in virulans. Three standart technigues are used to determine the virulans of Newcastle disease virus isolates. These are mean death time, intracerebral pathogenicity index and intravenous pathogenicity index, using embryos or baby chicks. Velogenic strains were iso lated from the epidemics. Some mesogenic and lentogenic strains may also result in forms of Newcastle disease. An affective immune response against the disease should protect the chickens against death, elinical signs and drop in egg production. The vaccines used should contain 10 7.0 EID/ 50 per dose at least . The vaccination programs suggested and the importance of the hijiyen in protection of the chicken flocks were discussed.