Sentences with phrase «oocysts cause»
Most exposures of humans to oocysts cause no overt disease.
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Once the oocysts are swallowed, they release sporozoites that invade the intestinal cells and can cause signs of illness.
Although mature dogs may shed the infective stage of the parasite (oocyst) from time to time in their stool, it almost never causes disease symptoms in these animals.
Protozoan species of the genus Cryptosporidium, such as Cryptosporidium hominis and C. parvum, can cause diarrhea in human hosts who have ingested as few as 10 microscopic oocysts (egglike structures that are made of chitin, the same protein that forms the exoskeletons of ants and other insects) contained in feces or contaminated water.