A number of 300 day·old ducldings from each Khaki-Campbell and Domyali
breeds was used to compare both blood constituents and immunity response under
the Egyptian environmental conditions. In general. concentrations of totat lipids,
chotestercl, calcium. hemoglobin and hematocrit value were significantly higher in
Khaki-Campbell than Domyati ducks. However, concentrations of total protein,
albumin. globulin, inorganic phosphorus and activity of GOT and GPT significantly
incraased in Domyati as compared to Khaki-Campbell ducks. Relative weighls of
pancreas. thymus and spleen and absolute weight of thymus and spteen were i'igher
in Domyati than Khaki-Campbell duds. Count of WBC's and drstribution of
lymphocytes significantly increased in Domyati ducks, while hetercpnils distribution
and HIl ratio increased in Khaki-Campbell ducks. Both primary and secondary
responses against SR8C's were si9nificantly higher in Oomy •. ti duclcs (92.2 and
272.6) than Khaki-Campbell ones (66.1 and 241.5), respectively.