Some studies on chickens vaccinated with newcastle disese vaccines

Maternal antibodies against Newcastel disease virus in baby chickswere tested at 1, 7, 15 and 21 days of age, it’s percentage were 83.3%,66.6%, 33.3% and 16.6% respectively. On the other hand the GM-HI antibody titers and NAT after vaccination with HBIND vaccine at 15th and 21 st of age were higher than vaccination at one and 7th days age. 1- Chicks vaccinated at 1 day old with HB 1 vaccinday old with LaSota vaccine, the GM-HI antibody titers and NAT ranged from (57-130), (3.6-6.4) respectively and the protection percent (88%-1000/0).3- Chicks vaccinted at 7 days old with HB 1 vaccine and revaccinated at 21days old with HBl the GM-HI antibody titers and NAT ranged from(33-65), (3.6-5.6) respectively and the protection percent (66%-80%).4- Chicks vaccinated at 7 days old with Hlsj-vaccine and revaccinated at21 days old with La Sota ND vaccine, the GM-HI antibody titers andNAT ranged from (57-160), (6.0-7.2) respectively and the protectionpercent was’ 100%.