Correct spelling for the English word "bilharziasis" is [bˈɪlhɑːzˌɪɐsˌiz], [bˈɪlhɑːzˌɪɐsˌiz], [b_ˈɪ_l_h_ɑː_z_ˌɪ__ɐ_s_ˌi_z] (IPA phonetic alphabet).
Bilharziasis, also known as schistosomiasis, is a parasitic infection caused by worms known as schistosomes. It is a chronic disease prevalent in tropical and subtropical regions, particularly in Africa, South America, the Caribbean, and Southeast Asia. The infection commonly occurs when a person comes into contact with freshwater contaminated with the parasitic larvae.
The life cycle of the schistosome involves two hosts. The parasites lay eggs in the veins surrounding the intestine or bladder of the infected individual, which are then excreted through feces or urine into water sources. These eggs hatch into larvae (miracidia) that seek out specific snails in the water, where they develop into a different larval stage (cercariae). Upon contact with humans, cercariae penetrate the skin, entering the bloodstream and migrating to various organs such as the liver, intestine, or bladder.
The symptoms of bilharziasis can range from mild to severe, depending on the duration and intensity of the infection. Common signs include fever, fatigue, abdominal pain, diarrhea, blood in urine or stool, and enlargement of the liver or spleen. However, individuals may experience an initial acute phase followed by a chronic stage that may lead to severe complications such as liver damage, kidney failure, or bladder cancer.
Prevention and control measures for bilharziasis focus on avoiding contact with infested water and the use of proper sanitation facilities. Treatment typically involves antiparasitic drugs, mainly praziquantel, which is effective against all species of schistosomes. Mass treatment programs and health education on hygiene practices and safe water sources are essential strategies to reduce the burden of bilharziasis in endemic areas.
The word "bilharziasis" is derived from the name of Theodor Bilharz, a German physician who first discovered the disease in 1851 while working in Egypt. Bilharz was investigating the cause of an epidemic that was affecting workers on the construction of the Suez Canal. He observed a parasitic infection in the urinary bladder of the affected individuals and described it as a new disease, which later came to be known as bilharziasis. The medical condition was later named after Bilharz, honoring his contribution to its discovery and understanding.