Paper Information

Journal:   SCIENTIFIC-RESEARCH IRANIAN VETERINARY JOURNAL   SPRING 2012 , Volume 8 , Number 1 (34); Page(s) 76 To 84.
 
Paper: 

THE COMPARISON OF PATHOLOGIC TRACHEAL INJURES, IMMUNE RESPONSE AND GROWTH INDICES FOLLOWING USING COMMERCIAL COMBINED AND EXPERIMENTAL MIXED NEWCASTLE AND BRONCHITIS LIVE VACCINES IN BROILER CHICKENS

 
 
Author(s):  GHOLAMI AHANGARAN M., NAMJOO A.R., ATAEI NAEINI B.
 
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Abstract: 

In this study, 450 broiler chicks divided randomly to 5 groups with 3 repeats. Chickens after receiving infectious bronchitis (IB) live vaccine in one day old, were vaccinated by drinking water with different approach in 8 day old: Group 1 as control group, received no vaccine. Groups 2 and 3 received Newcastle disease (ND) live vaccine (BI strain), and IB live vaccine (HI20 strain), respectively. Group 4 received ND live vaccine (BI strain) and IB live vaccine (HI20 strain), simultaneously (experimental mixed vaccine). Group 5 received commercial combined ND+IB live vaccine (BI and HI20 strain). Tracheal tissue sample for evaluation of pathologic injures was taken 3 days after vaccination (11 days old). Body weighting, blood sampling for determination of ND HI titer and tracheal sampling was done 6 days after vaccination (14 days old). Results showed that the mean of ND HI titer in group receiving experimental mixed ND+IB live vaccine was significantly lower than groups receiving ND live vaccine alone and combined ND+IB live vaccine (p<0.05). Furthermore, the mean of tracheal pathologic score in groups receiving experimental mixed ND+IB live vaccine and commercial combined ND+IB live vaccine were significantly higher than groups receiving IB or ND live vaccines, alone (p<0.05). Considering growth indices, there were no significant differences between groups. It seems that use of live vaccines alone by a proper timing interval prefer to use of mixed or combined ND+IB live vaccine for aspect of immunity and health of chickens.

 
Keyword(s): BROILER CHICKEN, NEWCASTLE, INFECTIOUS BRONCHITIS, VACCINE, INTERFERENCE
 
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