The infection is exhibited as respiratory, renal and reproductive forms.
Respiratory forms of the disease are usually observed in poorly vaccinated flocks. Secondary bacteria such as E.coli, as explained, can complicate the production parameters minimizing profit returns. Lesions include inflammation and accumulation of mucous in the trachea, nasal passages and sinuses. Air sacs may be cloudy and thickened.
Renal form of the infections is characterised by swollen and inflamed kidneys, distension of the ureters with build up of urate deposits. Holte and Gray are considered as nephrogenic strains and they have a high affinity (attraction) for the kidneys and the ureters. Mortality in renal form may go upto 60%.
Reproductive form characterised by damage to ovaries and shortened reproductive tract
Last modified: Thursday, 30 September 2010, 5:29 AM