the environmentally resistant transmissable form of Cryptosporidium excreted in the faeces of an infected person or animal.
n. Desiccation-resistant thick-walled structure in which sporozoans are transferred from host to host.
oocysts are Plasmodium cysts located in the outer stomach wall of mosquitoes, where sporozoite development takes place. When mature, the oocysts rupture and release sporozoites. Sporozoites subsequently migrate to the mosquito's salivary gland, and are injected into the host when the mosquito feeds.
A stage in the life cyle of malaria parasites, oocysts are rounded cysts located in the outer wall of the stomach of mosquitoes. Sporozoites develop inside the oocysts. When mature, the oocysts rupture and release the sporozoites, which then migrate into the mosquito's salivary glands, ready for injection into the human host.
sexual stage of many protozoa, especially Sporozoa
A parasite stage within the mosquito, produced by the union of male and female gametes.
A stage in the life cycle of coccidia (a protozoal parasite) that is shed in manure . Sheep become infected by ingesting oocysts from contaminated pastures.
a form of a protozoa parasite; the name used to signify the infective, egg-like structure of species of Cryptosporidium parvum, Isospora belli, or Cyclospora cayetanensis.
the earliest stage of the life cycle of a parasitic protozoan (e.g., cryptosporidium) in which it is enclosed in a hard-shelled capsule. Oocysts are dormant (non-growing) but may still be infectious.
A structure that is produced by [some] coccidian protozoa (i.e., Cryptosporidium) as a result of sexual reproduction during the life cycle. The oocyst is usually the infectious and environmental stage, and it contains sporozoites. For the enteric protozoa, the oocyst is excreted in the feces.
A thick-walled structure in which sporozoan zygotes develop.
The infectious stage of Cryptosporidium species and certain other coccidian parasites with a protective wall that facilitates survival in water and other environments and renders the parasite extremely resistant to chlorine.
The infectious stage of Cryptosporidium parvum and some other coccidian parasites with a protective wall, which facilitates survival in water and other environments.
An encapsulated ovum (egg) of a sporozoan parasite such as , usually excreted in the feces.
An egg-like structure found in feces that is used to transport a parasite to a new host. Ultimately these parasites invade the cell linings of the intestines.
A minute pouch or saclike body containing a fertilized cell of a parasite.
The infective fertilized egg of certain one-celled animal parasites including protozoa.
The fertilized egg form of parasitic sporozoa protozoa such as Giardia, Cryptosporidium, and Cyclospora that is encapsulated in a tough shell.