Pathological studes on some mycotic diseases in balady chicken

Abstract EN

This study was performed on 4 beady chicken farms in Dahlia Province during the period from November, 2008 to April 2009.

These farms suffered from difficult respiration, diarrhea and decrease body weight.

Other birds suffered from swollen crop and regurgitate of slimy foul smelling food.

These farms in (12.000, 10.000, 8.000 and 4.000) with (3%, 1 %, 1.5 % and 0.5 %) mortality rate respectively.

Their ages ranges from 25 to 120 days.

Twenty five birds were taken from each farm for mycological and pathological examination.

Macroscopically small garish white or yellowish fragile nodules of 1mm diameter were noticed in lung, air sacs, heart, liver, intestine, proventriculus and skeletal muscles.

Mycological examination revealed the isolation of Aspergillus species which identified by biochemical reaction as Aspergillus (favas – nagger, coriaceous and fumigates).

Histopathologically, numerous casemated nodules were observed in the pulmonary tissues, the nodular with a gaseous necrotic center surrounding with lymphocytes, macrophage and giant cells.

Congestion and hemorrhage were noticed in the liver, heart, kidney along with spectated hyphae of Aspergillums.

Other birds revealed the isolation of Candida species were isolated from other birds which were identified as C.

albinos (94) C.

iropicalis (4), C.

Kruse (1) and C.

parapsillosis (1).

These birds revealed thickening of the mucosa of the esophagus, crop proventriculus and gizzard which initially covered by slimy material these lesions progressed to diphtheritic membrane which was difficult to be removed.

Histopathologically, hyperplastic changes were reported in the certified layers of the crop, esophagus and proventriculus with degeneration and necrosis of the superficial mucosa.

The necrotic mucosa was covered with dip heretic membrane with intensive leukocyte infiltration in sub mucosa.

This study investigate the role of mystic disease specially Aspergillus and Candida species in baldly chicken farms during winter season.

Increase of humidity with lowering of temperature during the period from November to April is the main predisposing factor for mystic disease in baldly chicken farm.

In these studies the role of aspergillosis and candies in baldly chicken's farms was investigated.

It was reported that increased humidity and low temperature (November to April) predispose for mystic infection.