TY  - JOUR
T1  - Newcastle Disease Antibodies in Parent Stock, Yolk and Chicks
AU - , Sa’idu, L. AU - , P.A. Abdu AU - , L.B. Tekdek 
JO  - Journal of Animal and Veterinary Advances
VL  - 5
IS  - 6
SP  - 503
EP  - 506
PY  - 2006
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2006.503.506
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2006.503.506
KW  - Newcastle disease
KW  -parent stock
KW  -yolk
KW  -chicks
AB  - Parent stock, Yolk and chicks from five commercial hatcheries at Zaria and Kaduna were evaluated for  antibodies to  Newcastle disease ( ND ).  The  ND vaccination history and the age (s) of  the breeders were found out from the hatcheries. &#9;Haemmagglutination inhibition (HI) test was used for the detection  and quantification of  antibodies (AB) to ND  in the parent stock, yolk and  in the day old chicks. The HI titre of each bird, yolk and chick was determined and expressed in log <SUB>2</SUB> and the mean titres for the parent stock, yolk and chicks were calculated.  The ages of the parent stock ranged from 30 weeks for hatchery A to 95 weeks for hatchery B, all the hatcheries used to administer  ND vaccine Hitchner B1 ( intra ocular ) at day old, La Sota at 3 -5 weeks, Komorov at 6-8 weeks and another dose of komorov at 16 - 18 weeks. There after the birds were given booster ND vaccination using ND La Sota  vaccine or killed oil emulsion  Komorov  vaccine The HI.AB titre for the parent stock ranged from 5.8 &plusmn; 1.6 to 7.6 &plusmn;1.6 log <SUB>2 </SUB>and the titre for the egg also ranged from 5.1 &plusmn; 0.9  to 6.2 &plusmn; 1.7 log <SUB>2</SUB>. The HI titre for the chick ranged from 3.4 &plusmn; 1.4  to 5.3 &plusmn; 1.1 log<SUB>2 </SUB>at 1day (d) old and it declines to a lowest value of 1.1 &plusmn; 1.2 log <SUB>2</SUB> at 28d.  The study shows that all the parent stock had protective  AB titre (5.8 &plusmn; 1.6 to 7.6 &plusmn; 1.6 ) and there is a correlation between the AB titre in the serum of the parent stock and that of the yolk. The  AB titre in the chicks declines to non-protective level (1.5 &plusmn; 1.1 log <SUB>2</SUB>) at 14 d. It was concluded that although the titres of the parent stock is within protective level, it is still low and that the yolk of fertile eggs can be used to determine the AB titre of the parent stock.
ER  -