Infectious bronchitis? According to Merck:
Clinical Findings:
Signs occur after an incubation period of 18-48 hr. Spread to other birds is rapid, and morbidity may be nearly 100%. The nature and severity of the disease are influenced by the age and immune status of the flock and virulence of the causal strain. Young chickens cough, sneeze, and have tracheal rales for 10-14 days. Wet eyes and dyspnea may be seen, and facial swelling may also occur ccasionally, particularly with concurrent bacterial infection of the sinuses. In broiler chickens, IBV infection is a major cause of poor feed conversion, reduced growth rate, and condemnation of meat at processing. Nephropathogenic strains can produce interstitial nephritis with high mortality (up to 60%) in young chickens. In most outbreaks, however, mortality is 5%, although secondary bacterial infections may cause higher losses.
In layers, egg production may drop 5-50%, and eggs are often misshapen, thin-shelled, and contain watery albumen. Egg production and egg quality generally return to near normal levels in most birds on recovery.
Here's a link to the Merck Vet Manual: http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/206500.htm for more information.
ETA: Since the swelling can indicate secondary bacterial infection of the sinuses, that symptom may be treatable with antibiotics.
Clinical Findings:
Signs occur after an incubation period of 18-48 hr. Spread to other birds is rapid, and morbidity may be nearly 100%. The nature and severity of the disease are influenced by the age and immune status of the flock and virulence of the causal strain. Young chickens cough, sneeze, and have tracheal rales for 10-14 days. Wet eyes and dyspnea may be seen, and facial swelling may also occur ccasionally, particularly with concurrent bacterial infection of the sinuses. In broiler chickens, IBV infection is a major cause of poor feed conversion, reduced growth rate, and condemnation of meat at processing. Nephropathogenic strains can produce interstitial nephritis with high mortality (up to 60%) in young chickens. In most outbreaks, however, mortality is 5%, although secondary bacterial infections may cause higher losses.
In layers, egg production may drop 5-50%, and eggs are often misshapen, thin-shelled, and contain watery albumen. Egg production and egg quality generally return to near normal levels in most birds on recovery.
Here's a link to the Merck Vet Manual: http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/206500.htm for more information.
ETA: Since the swelling can indicate secondary bacterial infection of the sinuses, that symptom may be treatable with antibiotics.
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