CHRONIC RESPIRATORY DISEASE (CRD) –IN POULTRY
Chronic Respiratory Disease (CRD) in poultry causes economical loss to farmer and in sever case it may cause mortality. The main agents involved in the infection are Mycoplasma gallisepticum and E. coli . Stress caused by moving the birds, by debeaking, other operations/handlings or other unfavourable conditions (e.g. cold or bad ventilation), make the birds more susceptible. The main agents involved in the infection are Mycoplasma gallisepticum and E. coli. Mycoplasma gallisepticum + chronic stress factor + secondary coliform organisms cause respiratory disease. Species susceptible are Chickens , Turkeys etc. Transmission of CRD in Poultry The parent birds infected with Mycoplasma gallisepticum can transmit the organism through the egg to their offspring (vertical transmission). In addition, infection can occur by contact or by airborne dust or droplets (horizontal transmission). Egg transmission: It is of major importance and the means by which the disease perpetuates ...