SWAMP CANCER IN DOGS
SWAMP CANCER IN DOGS
By Tess Thompson
Swamp cancer is a relatively uncommon form of infection in dogs, horses, cats and humans. It is caused by a fungal infection known as phycomycosis due to pathogens that are present in stagnant water molds and fungi. The most common form of the disease is pythiosis that invades the body by contact and/or consumption of infected water. Although more common in dogs and horses, it can potentially occur in cats, cattle and even humans.
The most likely cause is the invasion of Pythium insidiosum. The organism needs stagnant water to reproduce and thrive. It can affect dogs swimming in swampy water or drinking contaminated water and also those coming in contact with grass that has been exposed to stagnant water.
The organism, present in water molds, enters into wounds in the skin or the gastrointestinal tract. Gradually the disease grows in the stomach and small intestines and leads to symptoms similar to the symptoms of liver cancer in dogs and gastrointestinal cancer.
Vomiting.
Diarrhea.
Lethargy.
Loss in weight.
A lump of mass in the abdomen.
Pythiosis of the skin leads to ulcerated lumps but it is rare in dogs. Granulomatous and itchy lesions containing yellow, firm masses of dead tissue form on lower limbs, abdomen, chest and genitals. In instances of severe prevalence the disease may spread to the underlying bone. As a form of feline cancer, swamp cancer usually affects only the skin in cats and appears mostly in the limbs, perineum, and the base of the tail and rarely in the nasopharynx.
Even though an ELISA (enzyme-linked-immunosorbent serologic assay) test has been developed for animals, a definitive diagnosis is done through biopsy. Prognosis for swamp cancer in dogs is bad. Surgery is not possible in all cases and even where surgery is performed there is an inherent risk of postoperative recurrence. Antifungal drugs have a limited affect on the disease and a new drug meant for water moulds is extremely expensive.
Regardless of the fact that water is utmost necessary for the survival, we have paid scant regard to this natural source of life. As long as the water around us is polluted the only prevention that we can take for our pets is to keep them away from potentially infected water.
It is also recommended that dogs should not be allowed to drink from puddles and ponds. Even if this care can be taken, there still remains the risk that dogs face from contaminated grass that has come in contact with contaminated water.
Moreover, it is improbable that we would be able to keep a hunter dog away from swamps and stagnant waters. Unless we take efforts to make our planet greener and avoid polluting the atmosphere and water, it seems that we may have to be careful of the contamination that exists.
References:
http://en.wikipedia.org/wiki/Phycomycosis
http://berryessavet.com/research.php
http://caymannetnews.com/2006/03/1041/reaches.shtml
http://tedeboy.tripod.com/drmichaelwfox/id36.html
http://medtech.cls.msu.edu/medtech/mendoza/epidemiology.html
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