The potential for dissemination due to cutaneous leishmaniasis was significantly higher in the nonindigenous population than in the indigenous population in Saudi Arabia. Disseminative lesions must be clinically differentiated from other skin diseases and appropriately treated by avoiding the use of intralesional drugs or physical therapy.
It was shown that ultra-violet radiation has a damaging effect on cercariae of Schistosoma mansoni and S. haematobium which are similarly influenced. Radiation of cercariae for intervals as short as 5–20 seconds markedly increased their mortality during penetration of host skin and inhibited migration of schistosomula in the lungs beyond days 3–4 post-infection. No mature adult worms were recovered from the liver and mesenteric veins of animals infected with irradiated cercariae. The practical significance of the cercaricidal property of ultra-violet radiation is discussed.
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