Infectivity to hosts of the endogenous stages of chicken and murine Cryptosporidium.
Five groups of 4 mice each were inoculated with 10(6) Cryptosporidium muris oocysts. They were necropsied on days 2, 4, 6, 8 and 10. The stomach mucosa from each group were made into 10% suspension in physiological saline and were orally inoculated to 2 mice each. Recipients given suspension from infected mice on day 6, 8 and 10 shed oocysts from 6, 9 and 6, respectively. Similarly, White Leghorn received 10(6) Cryptosporidium sp. oocysts were killed daily between 1 and 6 days. Recipients given bursa of Fabricius or caecum of donor birds on days 4, 5 and 6 shed oocysts. The endogenous stages of murine and chicken Cryptosporidium were able to infect the appropriate host.
Matsui
T
T
Department of Tropical Diseases and Parasitology, Kyorin University School of Medicine, Mitaka, Tokyo, Japan.
Fujino
T
T
Tsuji
M
M
D000818:Animals; D002060:Bursa of Fabricius / Q000469:parasitology; D002645:Chickens; D003457:Cryptosporidiosis / Q000503:physiopathology / Q000635:transmission / Q000662:veterinary*; D003458:Cryptosporidium / Q000302:isolation & purification / Q000502:physiology*; D005753:Gastric Mucosa / Q000469:parasitology; D051379:Mice; D008813:Mice, Inbred ICR; D011201:Poultry Diseases / Q000469:parasitology / Q000503:physiopathology / Q000635:transmission*