The aim of this study is to determine the effect of Hymenolepis nana infection in some blood
parameters of some final host ( rats & mice ) by experimental infection of 15 rats and 48 mice . The
results showed that the prepatant period between 12-14 days and the shape of eggs spherical & slightly
ellipsoid in mean 40.92 X 35.96 microne & the numbers of eggs in feaces increased with the severity
of the infection .
The infection which effected on the blood parameters by decreasing the means of packed cell volume ,
total white blood count , lymphocytes , while increased the means of neutrophils , monocytes ,
eosinophils & basohpils in infected group