Abstract
WE have received the third annual report of the Research Institute and the Endemic Diseases Hospital, Cairo, for the year 1933. This shows that, under the directorship of Dr. M. Khalil Bey, much valuable work is being done on the endemic diseases and epidemiology of Egypt. One of the most interesting announcements is the discovery of the intermediate host of a human trematode or ‘fluke’ parasite, Heterophyes heterophyes, first discovered in 1851. The second intermediate host is a fish, in which the cysts of the metacercarise were found in 1923, and from eating which human infection is derived. The first intermediate host has now been determined, and proves to be a fresh-water snail, Pirenella conica, which was found to be infected with the cercariae of the parasite, and by eating this infected snail the fish become infected.
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Medical Research in Egypt. Nature 136, 430–431 (1935). https://doi.org/10.1038/136430e0
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DOI: https://doi.org/10.1038/136430e0