Lm of cercarial larva

Lm of cercarial larva

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Credit: SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY.

Caption: Light micrograph of a cercarial larva (final & most infective stage) of the intestinal blood fluke Schistosoma mansoni, causing schistosomiasis known as bilharzia. The eggs hatch in freshwater & the young larvae bore into snails (intermediate host), until near maturity. Once mature the larvae swarm from the snail into the water and are picked up by humans (the final host), while bathing, working in rice fields or irrigation ditches. They enter the blood stream, mature into adulthood & settle in the blood vessels of the intestines causing dysentery. The release of their spiked eggs cause anaemia, inflammation & the formation of scar tissue. Mag: X63 (35mm). The larva was taken from the snail Biomphalaria

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Keywords: animal, blood, flatworm, fluke, invertebrate, invertebrates, light micrograph, nature, platyhelminthes, schistosoma mansoni, wildlife, zoology

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