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Schistosomiasis, also known as snail fever, bilharzia, and Katayama fever [1] [2] [9] is a disease caused by parasitic flatworms called schistosomes. [5] It affects the urinary tract or the intestines. [5] Symptoms include abdominal pain, diarrhea, bloody stool, or blood in the urine. [5]
Clinical symptoms are caused by the eggs. As the leading cause of schistosomiasis in the world, it is the most prevalent parasite in humans. It is classified as a neglected tropical disease. As of 2021, the World Health Organization reports that 251.4 million people have schistosomiasis and most of it is due to S. mansoni. [1]
Schistosoma is a genus of trematodes, commonly known as blood flukes.They are parasitic flatworms responsible for a highly significant group of infections in humans termed schistosomiasis, which is considered by the World Health Organization to be the second-most socioeconomically devastating parasitic disease (after malaria), infecting millions worldwide.
The symptoms change throughout the infection. In the early stage, symptoms are typically either not present or mild and may include fever, swollen lymph nodes, headaches, or swelling at the site of the bite. [1] After four to eight weeks, untreated individuals enter the chronic phase of disease, which in most cases does not result in further ...
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Symptoms of all forms of schistosomiasis are caused by the immune system's reaction to the eggs, rather than the adult worms themselves. [5] A few hours to days after cercariae invade the skin, some people experience pruritus and raised papules at the site of penetration. This is called cercarial dermatitis, also known as swimmer's itch.
Sloth fever virus is most common in sloths (hence, the name), plus birds and non-human primates like monkeys. But it can spread to people through the bite of certain insects like mosquitoes.
For comparison, while it takes a tick carrying Lyme disease nearly 24 hours to pass the infection on to a human host, a tick with POW can transfer the virus in as little as 15 minutes.