| ticks (acari:ixodidae) of the blue and white nile ecosystems in the sudan with particular reference to the rhipicephalus sanguineus group. | twenty-four adult ixodid tick species, infesting livestock and some wildlife hosts along the blue and white nile in the sudan, were identified. three species, boophilus geigyi, rhipicephalus camicasi and r. bergeoni, were recorded for the first time from the sudan. tick numbers on indigenous breeds of cattle (bos indicus) were relatively low, ranging between 17.1 and 40.5 per animal. young cattle grazing with the herd carried significantly fewer ticks than older animals. with the exception of b. ... | 1987 | 3331134 |
| observations on cattle schistosomiasis in the sudan, a study in comparative medicine. v. the effect of praziquantel therapy on naturally acquired resistance to schistosoma bovis. | studies in the white nile area of the sudan have shown that zebu cattle acquire a high degree of resistance to schistosoma bovis as a result of repeated natural exposures without, however, being able to eliminate their populations of adult schistosomes, although these do show greatly suppressed fecundity. to test whether these adult worms are necessary for the maintenance of resistance we cured six "naturally resistant" cattle (tc group) with a double treatment of 25 mg/kg praziquantel and compa ... | 1983 | 6650738 |