Studies on human fascioliasis in Egypt 1- seasonality of transmission

The present study aimed at investigating the seasonality of human fascioliasis. The monthly distribution of acute infection was studied together with the monthly Lymnaea cailliaudi snail density and infection. Infection was observed in both snail and human host throughout the year. However, maximal snail infection was observed during the months of June and July, while the number of acute human infections peaked in August. It was concluded that summer was the highest transmission season. The clinical incubation period was considered one or two months