PH 30007 Lecture 3: Schistosomiasis
29 Jan 2020
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Document Summary
Is the name given to a group of diseases caused by. S. hematobium, s. mansoni and s. japonicum. Symptoms is related to the location of the parasite in the human host. The prevalence of disease is high in egypt. There are very few cases in libya due to the. S hematobium the eggs are excreted through urine. In others species eggs are excreted through feces. Life cycle eggs hatch to miracidia. Larvae (cercariae) emerge from the snail and enter water. The larvae penetrate the skin of human beings and enter the blood vessels and reach the urinary bladder and large intestine. stools leads to spread of disease. Age and sex seen more in children. Social class more in poor people. Human habits polluting water with urine and. Artificial lakes and irrigation channels due to. Prevention of human contact with infected water. Snail control cleaning of canals, chemicals.
