Crop Canker in Poultry (Chickens): Signs, symptoms, and treatments

Crop canker in chickens: signs, symptoms, treatment, control, and prevention.

Crop Canker in Poultry (Chickens): Signs, symptoms, and treatments

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Crop canker (Trichomonas gallinae) , is a single-celled, pear-shaped protozoan most often found in pigeons and doves but can be contracted by other birds and chickens if the infected birds have access to the same water. There are different strains of this disease some not fatal and some fatal. According to an extensive study by Michigan dept. of natural resources the signs, symptoms, control and treatment for Trichomonoas gallinae are:
Signs & Symptoms
Most often located in the oral cavity, esophagus, and crop causing an obstruction where food cannot be processed properly.
  • Lesions-Yellow-white, encased necrotic nodules which cause an obstruction
  • Green saliva
Cheesy like lesions in the digestive tract
Control
While a mild infection can cause the birds to become immune to stronger strains there is no obvious way to be sure so it is advisable to keep them separate. Eliminate sources of infection by keeping your young birds separate from adult birds as they are more susceptible to crop canker. Separate birds who have had the illness and recovered from your flock and could be carriers.  It is advisable to have severely infected birds humanely euthanized.
Treatments
"Treatment is only feasible in captive birds because the drugs used for treatment must be administered orally, either by force feeding or by treating the food and/or water. Antiprotozoal medications that have been used are Dimetridazole, Metronidazole (Flagyl), Copper sulfate, Quaternary Ammonia, Carnidazole, Enheptin (curing carrier birds), Emtryl (1,2-dimethyl-5-nitroimidazole), and Aminonitrothiazole. Some of these medications are under review and some can be specifically used only on non-food birds (Metronidazole). Treatment of wild birds is difficult because of the availability of natural food and water sources."
​Reference: Michigan department of Natural Resources. http://www.michigan.gov/dnr/0,4570,7-153-10370_12150_12220-27288--,00.html

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