Total immunoglobulin was estimated
by precipitation method of McEwan and Fisher (1970).
Total antioxidant activity was measured by ferric reducing
antioxidant power assay of Benzie and Strain (1999) and
values were expressed as lmol/l of plasma. Erythrocyte
superoxide dismutase (SOD) activity was estimated in
haemolysate 1:10 as per the method described by Madesh
and Balasubramanian (1998) and expressed as U