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Common Diseases of Ducks (part 2)

August 19, 2008 | By Anonymous

Avian Cholera

Avian cholera, also called fowl cholera, caused by the bacterium Pasteurella multocida is an important disease of domestic ducks, and is an especially troublesome disease of ducks in some parts of Asia. This disease is associated with poor sanitation, and standing water in duck pens. Symptoms include loss of appetite, mucous discharge from the mouth, diarrhea, and in breeder ducks, labored breathing. Lesions found in dead birds include hemorrhages on heart muscle, mesentery and abdominal fat. The liver is enlarged, copper colored and friable (easily crumbled). Pinpoint whitish spots may be seen on the liver. Good sanitation practices go a long way toward preventing this disease. Sulfadimethoxine-ormetoprim (0.02-0.04%) and Chlortetracycline (0.044%). given in feed are effective treatments.


Colibacillosis

This common infection of poultry caused by Escherichia coli., causes reduced hatchability, infection of the yolk sac (omphalitis), a septicemia (bacterial invasion of bloodstream) in ducks 2-8 weeks of age and salpingitis and peritonitis in breeder ducks. In market ducks, E. coli. infection produces lesions very similar to those seen in Riemerella anatipestifer infection (see above). Good sanitation and management are important preventive measures. Sulfadimethoxine-ormetoprim (0.04-0.08%) and chlorotetracycline (0.044%) in feed are helpful in controlling this disease.


Aspergillosis

This condition occurs when ducks inhale spores produced by the mold (fungi) Aspergillus (Aspergillus fumigatus is the common species) that grows on damp straw or feed. These inhaled spores cause multiple nodules or plaques in the lungs and air sacs. Common signs include gasping, listlessness and dehydration. This disease is not to be confused with aflatoxin poisoning described below. The best solution to prevent aspergillosis is to avoid using moldy straw and preventing feed from getting wet.


by Tirath S. Sandhu, DVM, Ph.D.
SOURCE: www.duckhealth.com/duckhlth.html
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