Aim: The objective of the study was to estimate the humoral immune 
response in rabbits treated with Cucurbita maxima seeds. 
Materials and 
Methods: Thirty six male Newzealand White rabbits were divided into six 
groups (I, II, III, IV, V, VI) of six in each. Group I was the untreated 
control. Group II was treated with dexamethasone sodium (2 mg/Kg, i.m) for 7 
days. Group III was treated with levamisole hydrochloride at 2.5 mg/kg (s.c) 
thrice a week. Group IV was treated with Cucurbita maxima seeds. Group V was 
treated with levamisole and dexamethasone and Group VI was treated with 
dexamethasone and Cucurbita maxima seeds. The seed was given @ 1000 mg/kg orally 
for 10 days. Antibody titre and serum immunoglobulin concentration were 
estimated along with haematology. 
Results: Dexamethasone caused 
significant decreases in the antibody titre, immunoglobulin concentration where 
as Curcurbita maxima, Dexamethasone + Curcurbita maxima and dexamethasone + 
levamisole groups showed significant increase in these entities. There were no 
significant differences in RBC count, Haemoglobin contents among all the groups 
studied. 
Conclusion: Results suggest that Cucurbita maxima seeds has the 
ability to stimulate humoral immune response in rabbits. 
Keywords: 
Cucurbita maxima, dexamethasone, levamisole Hcl, rabbit