R. E. Purnell

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A number of observations were carried out on the effect of the newly isolated parasite, Babesia motasi (Wales) on intact and splenectomised sheep and on a splenectomised goat. The parasite was not pathogenic for intact animals but caused fever and anaemia in splenectomised ones. B motasi (Wales) was also studied morphologically, morphometrically and(More)
The transmission by the tickRhipicephalus appendiculatus ofTheileria lawrencei (Serengeti) from buffalo to cattle, and thence between cattle, is described. Buffalo were shown to act as carriers ofT. lawrencei (Serengeti) piroplasms infective for ticks for up to 26 months. Tick transmission ofT. lawrencei (Serengeti) from buffalo to cattle was efficient, but(More)
Successive pairs of approximately 4-month-old Friesland bull calves, raised under worm-free conditions, were exposed to helminth infection for 14 days on dry-land Kikuyu grass pastures at 28-day to monthly intervals, on a coastal farm in a non-seasonal rainfall region of the Eastern Cape Province. With the exception of one pair of calves exposed for 28(More)
245 buffalo from 13 areas of East Africa were examined for theilerial infections. The vast majority of buffalo (97.1%) examined had piroplasms in their erythrocytes. Theileria lawrencei was isolated from the buffalo by tick feeding and cell culture and was found to be common in most of these buffalo populations. Also over 50% of the buffalo had indirect(More)
There are apparently three species of bovineBabesia within the European Community-B. divergens,B. major andB. bovis. The former is the principal cause of disease, but lack of information about the other two, particularly about the ability of the tickIxodes ricinus to act as their vector, makes further investigation essential. The potential hazard of(More)