Browsing by Author "Watson, H.J.C."
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Item Titres of The Igm Class of Immunoglobulins In Gambian Sleeping Sickness and Other Disease Conditions(1961/1962) Watson, H.J.C.; Chirieleison, G.; Nigerian Institute of Trypanosomiasis Research KadunaThe work of Mattern et al. (1961) and Mattern (1962) has demonstrated that raised levels of the IgM class of immunoglobulins which occur in human trypanosomiasis provide a valuable means for the presumptive diagnosis of the disease. In considering the use of this technique, it is obviously of importance that information should be available on the IgM titres occurring in other pathological conditions which might complicate or confuse its application. This paper describes findings in patients with Gambian trypanosomiasis, both before and after they had been treated, and in a variety of other conditions.Item The Transmission of Trypanosoma Vivax by Glossina Palpalis(1955) Fairbairn, H.; Watson, H.J.C.; West Africa Institute of Trypanosomiasis ResearchZiemann (1912) pointed out that the infection of domestic animals with Trypanosoma vivax in the Cameroons seemed, like malaria, to show a definite curve. There was an increase of new infections both at the height of the rainy season and at its end, corresponding, he considered, to the increase in the number of tsetse-flies. Lloyd and Johnson (1924) found a seasonal variation in the proportion of Glossina tachinoides infected with T. vivax, the mature infections increasing as the rains progressed; they attributed this variation to the increasing average age of the flies, since few young flies were emerging during the rains. Squire (1951) found a marked seasonal fluctuation in the infection rates of G. palpalis with T. vivax, the incidence being highest during the months of heavy rainfall (July-October). He divided his flies into age-groups, according to the wing colour and fraying, and, as the results were based on his age-groups 2 and 3, there was no question of the infection rates being upset by the presence of newly emerged flies, which had not yet had a chance of becoming infected. He thought that there might be a positive correlation between infection rates and rainfall and a negative correlation with sunshine. Nash and Page (1953) also found a seasonal variation in the infection rates of G. palpalis with T. vivax, the peak again being highest in the rainy season; they too considered that this wet-season peak was associated with the increase in average age of the flies during the rains.
