Obreshkov K, Khadzhiev G
Vet Med Nauki. 1977;14(9):37-46.
Three local lentogenic strains of the Newcastle disease virus, GT, D and R, were made use of to produce live liquid vaccines. These proved harmless and immunogenic when applied through the spray-method to broiler chicks, aged 5 days, at three successive revaccinations (on the 25th, 60th and 140th day of age) carried out by the same method. The strain D vaccine induced serum antihemagglutinins that had higher titers than those induced by vaccines of the other local strains and the standard strains Hitchner-B1 and La Sota.
利用新城疫病毒的三种本地弱毒株GT、D和R生产活液疫苗。当通过喷雾法将这些疫苗应用于5日龄的肉鸡雏鸡，并在25日龄、60日龄和140日龄时采用相同方法进行三次连续再接种时，证明它们是无害且具有免疫原性的。D株疫苗诱导产生的血清抗血凝素滴度高于其他本地毒株疫苗以及标准毒株希钦纳-B1和拉索塔疫苗诱导产生的滴度。
