Intestinal Bilharzia Fluke

Schistosoma mansoni

''Schistosoma mansoni'' is a water-borne parasite of humans, and belongs to the group of blood flukes. The adult lives in the blood vessels near the human intestine. It causes intestinal schistosomiasis. Clinical symptoms are caused by the eggs.
Blood Fluke (Male) - Schistosoma mansoni Schistosoma mansoni is a water-borne parasite in humans. It is the most prevalent parasite in humans and causes intestinal schistosomiasis, which infects over 250 million people worldwide. It is considered to be a Neglected Tropical Disease. Treatment is inexpensive and only costs about US$0.20 per child per year! And yet, treatment is still hard to obtain in poor, developing countries.

The disease is spread by contact with fresh water contaminated with the parasites, which are released from infected snails. Symptoms include abdominal pain and diarrhea . Long-term, it can cause liver damage, kidney failure, infertility, or bladder cancer. Children are particularly vulnerable because they play in water, which is often contaminated with infected snails.

*Whole mount slide
https://www.jungledragon.com/image/114415/blood_fluke_male_-_schistosoma_mansoni.html
https://www.jungledragon.com/image/114413/blood_fluke_male_-_schistosoma_mansoni.html Geotagged,Schistosoma mansoni,United States,Winter

Naming

''S. mansoni'' was first noted by Theodor Maximillian Bilharz in Egypt in 1851, while discovering ''S. haematobium''. Sir Patrick Manson identified it as unique species in 1902. Louis Westenra Sambon gave the name ''Schistosomum mansoni'' in 1907 in honour of Manson.
Blood Fluke (Male) - Schistosoma mansoni Schistosoma mansoni is a water-borne parasite in humans. It is the most prevalent parasite in humans and causes intestinal schistosomiasis, which infects over 250 million people worldwide. It is considered to be a Neglected Tropical Disease. Treatment is inexpensive and only costs about US$0.20 per child per year! And yet, treatment is still hard to obtain in poor, developing countries.

The disease is spread by contact with fresh water contaminated with the parasites, which are released from infected snails. Symptoms include abdominal pain and diarrhea . Long-term, it can cause liver damage, kidney failure, infertility, or bladder cancer. Children are particularly vulnerable because they play in water, which is often contaminated with infected snails.

*Whole mount slide; this photo was taken at low magnification, just so that I could get a shot of the entire worm.
https://www.jungledragon.com/image/114415/blood_fluke_male_-_schistosoma_mansoni.html
https://www.jungledragon.com/image/114414/blood_fluke_male_-_schistosoma_mansoni.html Geotagged,Schistosoma mansoni,United States

Reproduction

Unlike other flukes in which sexes are not separate, schistosomes are unique in that adults are divided into males and females. However, the two adults live in permanent partnership, a condition called ''in copula''; for this, they are considered as hermaphrodites. The life cycle of schistosomes includes two hosts: humans as definitive hosts, where the parasite undergoes sexual reproduction, and snails as intermediate hosts, where a series of asexual reproductive takes place. ''S. mansoni'' is transmitted through water, where freshwater snails of the genus ''Biomphalaria'' act as intermediate hosts. The larvae are able to live in water and infect the hosts by directly penetrating the skin. Prevention of infection is done by improved sanitation and killing the snails. Infection is treated with praziquantel.
Blood Fluke (Male) - Schistosoma mansoni Schistosoma mansoni is a water-borne parasite in humans. It is the most prevalent parasite in humans and causes intestinal schistosomiasis, which infects over 250 million people worldwide. It is considered to be a Neglected Tropical Disease. Treatment is inexpensive and only costs about US$0.20 per child per year! And yet, treatment is still hard to obtain in poor, developing countries.

The disease is spread by contact with fresh water contaminated with the parasites, which are released from infected snails.  Symptoms include abdominal pain and diarrhea . Long-term, it can cause liver damage, kidney failure, infertility, or bladder cancer. Children are particularly vulnerable because they play in water, which is often contaminated with infected snails.

*Whole mount slide
https://www.jungledragon.com/image/114414/blood_fluke_male_-_schistosoma_mansoni.html
https://www.jungledragon.com/image/114413/blood_fluke_male_-_schistosoma_mansoni.html Geotagged,Schistosoma,Schistosoma mansoni,United States,Winter,blood fluke,schistosomiasis,snail fever

Food

Developing ''Schistosoma mansoni'' worms that have infected their definitive hosts, prior to the sexual pairing of males and females, require a nutrient source in order to properly develop from cercariae to adults. The developing parasites lyse host red blood cells to gain access to nutrients and also makes its own fungi from its waste it is hard to detect; the hemoglobin and amino acids the blood cells contain can be used by the worm to form proteins. While hemoglobin is digested intracellularly, initiated by salivary gland enzymes, iron waste products cannot be used by the worms, and are typically discarded via regurgitation.

Kasschau et al. tested the effect of temperature and pH on the ability of developing ''S. mansoni'' to lyse red blood cells. The researchers found that the parasites were best able to destroy red blood cells for their nutrients at a pH of 5.1 and a temperature of 37 °C.

References:

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Taxonomy
KingdomAnimalia
DivisionPlatyhelminthes
ClassRhabditophora
OrderDiplostomida
FamilySchistosomatidae
GenusSchistosoma
SpeciesS. mansoni