Calcium dependent or independent pathway for antibody response against sheep red blood cells in various indigenous and imported breeds of chicken

TL;DRAbstract

Birds (433), 7-week-old, of both sexes belonging to Indian native breeds including Aseel, Kadakanath, Naked Neck and Frizzle fowl along with the exotic breeds like Dahlem red, White Leghorn, Synthetic Dam Line (SDL) and Naked Neck broiler were utilized to test the complement response (expressed as CH50 unit/ml) to sheep erythrocytes determined by means of both calcium dependent pathway or classical pathway (CPW) and calcium independent pathway or alternate pathway (APW). The effect of genotype (breed), sex and their interactions on antibody response was also studied. The results revealed the presence of natural CPW and APW antibodies on day of immunization in all groups under study irrespective of sex. The natural APW response was highest in Aseel and lowest in broilers. The highest CPW responses were observed in Dahlem red and Aseel followed by Kadakanath, Naked Neck, White Leghorn, Frizzle, SDL broiler and NN broiler on day 5 p.i. Aseel had the highest level followed by Kadakanath, b

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