Geraldine Simonson Nelson

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Two epidemics of a new virus disease, tanapox, occurred in 1957 and 1962 among the Wapakomo tribe along the Tana River in Kenya. Several hundred people were affected by a short febrile illness with headache and prostration and the disease was characterized by a single pock-like lesion on the upper part of the body. A pox virus, unrelated to the(More)
Epidemiological and experimental studies indicate that heterologous immunity resulting from exposure to bovine and other animal schistosomes might be of some importance in determining the relative severity of schistosome infection in man in different parts of the world. The reduction in the severity of a disease process, resulting from exposure to(More)
Epizootiological observations on Schistosoma bovis in cattle at Kosti, Sudan, showed a significant fall in age-specific prevalence and intensity with age, based on fecal egg count. To test the possibility that this is due to acquired resistance, Kosti cattle and a control group of cattle of similiar breed and age from a nonenzootic area were experimentally(More)
Ackertia globulosa sp. n. (Nematoda: Filarioidea) is described from the pulmonary arteries of the striped mouse, Lemniscomys striatus striatus (L.), in Kenya. Distinguishing features are the small size of the adults; the short left spicule and arrangement of the caudal papillae (3 pairs preanal, 4 pairs postanal) of the male; small projecting lobes on the(More)