Published: July 03, 2009 06:02 pm         

Paw Prints: Feline hyperthyroidism possibly linked to household pollutant

The Environmental Protection Agency conducted a study regarding the possible connection between polybrominated diphenyl ethers (PBDE – a flame retardant chemical added to various household products) and an increase in hyperthyroidism in cats. This study, published in the journal Environmental Science and Technology, confirmed that some housecats had high levels of PBDEs. Although the evidence was not conclusive, it is possible that PBDE’ may increase the risk of hyperthyroidism in cats. PBDEs have been a concern for years as a potential health risk for humans, particularly relating to the nervous and reproductive systems.

Polybrominated diphenyl ether is a flame retardant commonly used in the manufacturing of household products such as upholstery, carpets, and mattresses. PBDEs have been used since the 1970s and products containing this chemical release it into house dust. This can then be ingested or inhaled into the body. Veterinary research is currently analyzing the connection between PBDEs and deteriorating illnesses in pets.

“Hyperthyroidism is one of the most common conditions found in older cats,” says Dr. Louise Murray, director of medicine for the ASPCA’s Bergh Memorial Animal Hospital. “It’s usually caused by a benign tumor of one or both thyroid glands, which can lead to increased levels of thyroid hormone in the body.” Symptoms can include weight loss, rapid heart rate, vomiting, diarrhea, increased appetite, thirst, and urination.

If treated quickly and with the appropriate care, feline hyperthyroidism is not fatal. According to Dr. Murray, left untreated it can result in heart disease and eventually heart failure.

The ASPCA recommends the following precautions to help keep you and your pet safe:

Use a vacuum cleaner and air conditioners with a HEPA filter and regularly change the filters. Cover upholstery tears that expose polyurethane foam, especially if the foam has broken up. Cover mattresses with allergen barriers in order to reduce dust that could contain PBDEs. The mattress label will indicate if polyurethane foam was used; do not remove the label.



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