الفهرس 
1. INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The current study was designed to assess the impact of the increasing water temperature (as a possible consequence of climate changes) on the intermediate host snails (Biomphalaria alexandrina and Bulinus truncatus) of schistosomiasis. A field study was conducted as seasonal surveys in three Northern Delta governorates of Egypt to investigate the current abundance of these snails. The results showed that B. alexandrina was more dominant and abundant than B. truncatus. So, B. alexandrina species was chosen for further laboratory study. A climate model (GCM -ACCESS CM2) was conducted on two scenarios SSPs 126 (optimistic) and SSPs 585 (worst pathway) to predict the changes in temperature. Increased water temperature was expected to be between 30°C and 34°C. So, the water temperatures of 30, 32, and 34°C (as low, moderate, and high warming climate projections) were selected for the laboratory study on the impact of increasing water temperature on their biological parameters, and infection with Schistosoma mansoni. The results indicated that the potential increase in temperature due to climate change may affect the population of B. alexandrina snails by reducing the survival rate as well as minimizing the production of new generations. In addition to reducing the infection rate with Schistosoma mansoni. Thus, it is expected that higher temperatures, in warm climates, may be limited the transmission of schistosomiasis because of thermal stress on the parasites and their hosts.