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Biomedical subjects

R G Pegram

Publications and source records attributed to R G Pegram.

49 records · Page 3Linked to original sources

Acute Trypanosoma vivax infection of Ethiopian cattle in the apparent absence of tsetse.

Investigations of acute trypanosomiasis in a group of 1,200 cattle provided strong evidence for mechanical transmission by haematophagous flies other than tsetse. Although recently introduced cattle may have had previous contact with tsetse flies the incident occurred in an area remote from their known range. Mortality exceeded 6% before the outbreak was controlled by chemotherapy. Mechanically transmitted Trypanosoma vivax infection may be of widespread occurrence in eastern Ethiopia.

Acute Disease↗

Isolation and transmission of Theileria mutans (Chisamba) in Zambia.

Theileria mutans (Chisamba) was isolated from a steer at Chisamba, Central Province, Zambia by inoculation of blood into a susceptible unsplenectomised calf. The parasite was then transmitted on three occasions by nymphs and once by adult Amblyomma variegatum ticks. Macroschizonts, typical for T mutans, were detected in two calves for short periods. The parasite caused varying degrees of anaemia in all experimental calves, whose sera showed high antibody titres to T mutans in the indirect fluorescent antibody test.

Animals↗

Hyalomma (Hyalommina) arabica sp. n. parasitizing goats and sheep in the Yemen Arab Republic and Saudi Arabia.

Hyalomma (Hyalommina) arabica sp. n. is described from 62 adults (29 males, 33 females) taken throughout the year from 23 goats and two sheep, mostly at 200 m altitude in the southern tihama foothills of Ta'izz Province, Yemen Arab Republic. One female from a goat at 2,300 m altitude in this Province may have attached to the host elsewhere and a male from Mecca, Saudi Arabia, was on a goat imported from an unknown source for the traditional religious pilgrimage feast. We postulate that the original host of adults was the Nubian ibex, Capra ibex nubiana F. Cuvier (Artiodactyla: Caprinae). This parasite is most closely related to H. (H.) kumari Sharif, which infests chiefly wild and domestic Caprinae from India to northwestern Iran and Tadzhik, SSR. It also shows relationships to H. (H.) punt Hoogstraal, Kaiser and Pedersen, which parasitizes gazelles and domestic mammals in Somalia and Ethiopia, but differs more widely from the third African-Arabian member of this subgenus, H. (H.) rhipicephaloides Neumann, which feeds on the Nubian ibex and gazelles in the Red Sea and Dead Sea areas. The Hyalomma subgenus Hyalommina now contains seven species, four confined to the Indian subcontinent (including Nepal, Burma, India, Sri Lanka, Pakistan, and Afghanistan) and Southwest Asia, and three in eastern Africa north of the equator and Arabia.

Animals↗

Salmonella in livestock and animal by-products in Ethiopia.

Samples derived from farm livestock, an abattoir and a bone factory, were examined for salmonella. Twenty-seven serotypes were detected in 130 infected samples. A bone factory product was heavily infected. Salmonellosis is considered to be an important disease of dromedary calves and poultry in Ethiopia.

Abattoirs↗