Cryptosporidiosis has a worldwide geographical and zoological distribution.
Cryptosporidium baileyi oocysts were isolated from the bursa of Fabricius (BF)
of 4 weeks-old of 100 broilers. Twenty five broiler chicks of 2 day old free
from cryptosporidial infection were inoculated intratracheally at a dose' of
lx106 chicks. Five chicks were sacrificed at 4th, 8th, 12th, 16th, and 20th day postinoculation.
Selected tissues from bursa of Fabricius, cloaca, colon, caeci and
tracheas were taken and examined directly by scraping tedhnique for endogenous
stages. The distribution of C. baileyi in different tissues in the case of
intratracheal inoculation; trachea 23 (92 %) chicks infected, bursa of Fabricius
21(84%) chicks, Cloaca 5 (16 %) chicks, Colon 1 (4%) chick and the caeci
showing no infection. Daily examination of the intratracheal droppings
inoculation was done at the 5th day and lasted for 18-20 days, the patent period.
Key words: Cryptosporidium baileyi, oocyst, inoculation, broiler chicks. |
