Exposure to common household chemicals linked to bladder cancer in dogs

In a recent study published in Environmental Science & Technology, researchers compared levels of chemical exposures between healthy dogs and dogs displaying early signs of bladder cancer.

In short:

• Thirty nine chemicals were detected in more than half of the dogs tested.
• Dogs who tested positive for early markers of bladder cancer were exposed to more individual chemicals, and at higher levels of exposure.
• Early signs of bladder cancer were closely linked to chemicals that are commonly found in household products, like flame retardants and plasticizers used in flooring materials.
• Higher chemical exposures were also found in dogs who live in hotter areas, dogs with shorter coats, and dogs whose owners use pesticide products (including flea and tick medicine).

Key quote:

“Our household pets share our daily domestic environment and thus offer opportunities for consideration as sentinel species for exposure related concerns.”

Why this matters:

Bladder cancer is the fifth most common cancer in humans worldwide, and research has found that canine bladder cancer shares many similarities (including some genetic features) with invasive bladder cancer in humans. Because pets share our indoor and outdoor environments, they also share many of our exposures to chemicals and pollutants. This study highlights the complicated ways that chemical mixtures can impact health, and the importance of recognizing exposure risks in animals as indicators of potential threats to human health.

Related EHN coverage:

• BPA in pet toys may increase dogs’ risk for obesity
• Microplastics found in the testicles of both man and man’s best friend

More resources: Environmental Working Group offers a range of consumer guides to help empower shoppers to buy cleaner products and reduce chemical exposures in their homes.