Objective
Studies on immunity and morbidity will be carried out in a previously identified area of high morbidity attributable to schistosomiasis mansoni near Kambu in Machakos District, Kenya, within the framework.of an expanded control programme based on chemotherapy of schoolchildren. previous work under STD and other support has demonstrated the existence of an age-dependent acquired resistance to reinfection after chemotherapy, and has shown that this is associated with Ige antibodies against adult worm antigens, including (although not exclusively) a22 kda molecule. Further work will be carried out both on sera from previously studied patients and on sera and lymphocytes from new cohorts of heavily-exposed individuals, treated on one or more occasions and subsequently followed for reinfection. Emphasis will be placed on the relative roles of Thl and Th2 responses, the protective role of Ige and Iga antibodies, and the molecular targets of the protective immune responses. Particular attention will be given to a previously-studied glutathione S-transferase (p28) and to the newly-characterised 22 kda molecule, as well as to other antigens that are preferentially recognised by Ige. Possible reasons for the high morbidity due to schistosomiasis mansoni in Kambu will also be investigated. In particular, a possible interaction with malaria will be tested by simultaneous treatment for schistosomiasis and chemoprophylaxis for malaria: possible interactions with nutritional status will be examined following changes in nutritional Status after chemotherapy for schistosomiasis: and abnormalities in the regulation of immune responses will be investigated in the context of anti-idiotypic T cell responses. The project will also provide the framework for ph.D studies on possible interactions of schistosomiasis with hepatitis Bor Cor with brucellosis; on possible parasite strain differences; and on snail dynamics. Plans will also be developed (for funding from other sources) for placebo-controlled studies on the effect of propranolol in reducing oesophageal varices and haematemesis, and for the investigation of possible interactions between Hiv and schistosome infections.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- medical and health sciences health sciences infectious diseases malaria
- medical and health sciences basic medicine immunology
- medical and health sciences health sciences infectious diseases RNA viruses HIV
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Coordinator
CB2 1QP Cambridge
United Kingdom
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