Characterization of emerging Newcastle disease virus isolates in China

Table 6 Antibody response and post-challenge mortality of chicks immunized with different vaccines and then challenged with NDV/Chicken/TC/1/2011

NDV vaccine ^a	Mortality in each challenge^b (%) 7DPC ^c	NDV-HI GMT^d against LaSota strain 56 DPV^e	14 DPC
Oil-TC/1	0	147	1024
Oil-Las	17	147	1024
Live-Las	25	156	2048
Oil-TC/1 plus Live-Las	0	274	2048
Oil-Las plus Live-Las	9	362	2194
Un-inoculated control	100	All died	All died

^aAt the age of 3 weeks, twelve chicks per group were vaccinated, respectively. After 2 weeks, a booster dose of each vaccine was administered to the bird. Blood samples were taken on 3 week after booster
^bOral challenge with the allantonic fluid of virulent NDV/Chicken/TC/1/2011 isolate
^cDPC: days post-challenge
^dNDV-HI GMT: geometric mean titer of NDV hemagglutination-inhibition titer
^eDPV: days post-vaccination

ISSN: 1743-422X