Cryptosporidium felis
| Cryptosporidium felis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Cryptosporidium felis | ||||||||||||
| Iseki 1979 |
Cryptosporidium felis is an oval small intestine - parasite of the genus Cryptosporidium , a feline diarrhea , the Feline cryptosporidiosis caused. The oocysts of C. felis are 4.3 microns (3.5-5 microns) is somewhat smaller than that of C. parvum . The pathogen appears to be specific to cats, and all attempts to infect other mammals have been unsuccessful. However, evidence of C. felis has been documented in the stool of an AIDS patient.
It is transmitted faecal-orally or via contaminated feed or drinking water. The oocysts contain four sporozoites , which excyst in the small intestine and penetrate the mucous membrane of the small intestine . The pathogen is phagocytosed by phagocytes , but the sporozoites remain on the cell surface because the cell membrane of the phagocytes bulges outward over the small parasites. This creates a strongly folded membrane structure called an apical organelle ( feeding organelle ). In this vacuole , the schizogony takes place, through which eight daughter merozoites arise, which attack further intestinal cells. Sexual reproduction then begins. Macrogametocytes and microgametocytes are formed which fuse with one another, whereupon the macrogametus forms an oocyst wall and becomes an oocyst. Even in the host begins sporulation , formed in the back four sporozoites within the oocyst. Self-infection is presumably possible, i.e. the sporozoites can be released within the host without any external passage. The prepatency period lasts five to six days, the patent period seven to ten days.
literature
- Dwight D. Bowman, Charles M. Hendrix, David S. Lindsay, Stephen C. Barr: Feline Clinical Parasitology. John Wiley & Sons, 2008, ISBN 9780470376591 , pp. 6-7.
