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Biomedical subjects

G Uilenberg

Publications and source records attributed to G Uilenberg.

At least 109 records · Page 6Linked to original sources
PubMed1976

Studies on Theileriidae (Sporozoa) in Tanzania. I. Tick transmission of Haematoxenus veliferus.

Haematoxenus veliferus was experimentally transmitted in cattle on two occasions by the tick Amblyomma variegatum; transmission was transstadial, from nymph to adult. Theileria mutans and Cowdria ruminatium were transmitted at the same time. H. veliferus infected at least 15% of red cells in a splenectomized steer and 10% in a normal steer. One experiment on transstadial transmission from larva to nymph was unsuccessful.

Animals↗
PubMed1976

Studies on Theileriidae (Sporozoa) in Tanzania. II. Serological characterization of Haematoxenus veliferus.

Piroplasm antigen of Haematoxenus veliferus, prepared from cattle with a high parasitaemia, showed the presence of antibodies to this parasite in infected animals, using the indirect fluorescent antibody test. A positive titre may persist for at least 4 months, and marginal titres for at least 8 months. There was no cross-reaction in the IFA test with either T. parva or T. mutans.

Animals↗
PubMed1976

Studies on Theileriidae (Sporozoa) in Tanzania. III. Experiments on the transmission of Theileria mutans by Rhipicephalus appendiculatus and Amblyomma variegatum (Acarina, Ixodidae).

The parasite considered to be Theileria mutans in East Africa could not be transmitted transstadially by Rhipicephalus appendiculatus (seven attempts); it was transmitted by Amblyomma variegatum in 6 out of 7 experiments. The possibility that the original South African T. mutans, transmissible by R. appendiculatus, and the parasite called T. mutans in East Africa, are different species, has to be considered.

Animals↗
PubMed1976

Studies on Theileriidae (Sporozoa) in Tanzania. IV. A field trial on immunization against East Coast fever (Theileria parva infection of cattle).

Seven cattle, immunized by an infection and treatment method with 3 strains of Theileria parva (Muguga, Kiambu 5 and Serengeti transformed), and five controls were exposed to natural tick infestation in Tanzania, at a site where 2 precontrols had previously contracted fatal East Coast fever within 3 weeks. All controls became infected with fatal ECF within a month of exposure. One immunized animal survived, two died from a Theileria mutans infection and one from a Babesia bigemina infection. The cause of death of the other three animals could not be ascertained, but East Coast fever could not be incriminated. Immunized cattle took longer to succumb than the controls, and serological results showed that all immunized animals became infected with T. parva during exposure, without showing symptoms of ECF.

Animals↗