Immunosuppressive Effect of Blood parasites on Vaccination of cattle and Buffaloes Against Rift Valley fever

In this study the immunosuppressive effect of blood parasite onvaccination of cattle and buffaloes against Rift Valley Fever was carriedout. The results could be summarized as follows: 1. The level of infection with T. annulata was higher in cattle thanthatin buffaloes as demonstrated by the presence of erythrocytic stages andKoch’s blue bodies especially after vaccination with RVF virus vaccine.The rate of infection with Theileria and Koch’s blue bodies has beenraised insignificantly in buffaloes as well as cattle. The mean level in caseof erythrocytic stages of Theileria / 10.000 R. B. Cs pre-vaccination was2.5, while in case of post-vaccination was 3. There were no markeddifferences in lymphocytic stages pre- and post-vaccination. Despite thehigh level of lymphocytic infection, in cattle as in group (A). There was alittle increase in the level in post-vaccinated than in pre-vaccinated cases. The figures declared 1l.7 & 10.3 respectively. The vaccine stimulated the Jymphocytes of buffaloes apparently non-infected, the clinical symptomshad been shown after vaccination.