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Nutrition Nuggets
 
 
Your dog's nutrition is important for a healthy & happy life. petMD experts help you to know what to feed your dog, how much food to feed, and the differences in dog foods, so your dog gets optimum nutrition.
Nutrition Nuggets is the newest offshoot of petMD's Dog Nutrition Center. Each week Dr. Coates will use her expertise and wisdom to blog about the intricacies of dog nutrition.

Aflatoxin — Another Potential Food Contaminant

July 20, 2012 / (1) comments

I’m sure you are all aware of the current recall of dog and cat foods that have been manufactured primarily at a Diamond Pet Food plant in Gaston, SC because of potential contamination with Salmonella infantis bacteria. This is the same processing plant that was involved in an outbreak of aflatoxicosis in 2005-2006 that led to the deaths of more than 100 dogs. While most owners have at least heard of Salmonella, the dangers associated with aflatoxin are not as well known.

Aflatoxin is a toxic byproduct produced mainly by Aspergillus fungi. Aspergillus lives in the soil around the world and grows on crops like corn, peanuts, rice, soybeans, wheat, and oats. Under hot and dry environmental conditions and/or when crops are otherwise stressed (e.g., by an infestation of large numbers of insects) the fungi that are living on the crops will produce aflatoxin. Contamination levels increase if crops are handled incorrectly after harvest or are stored under conditions that promote fungal growth.

Aflatoxins can have a variety of effects when they are ingested by animals. Liver failure is a frequent outcome, with many patients dying despite prompt diagnosis and aggressive treatment. Dogs that are suffering from liver failure typically have some or all of the following symptoms:

  • loss of appetite
  • yellow discoloration of the whites of the eyes and other tissues
  • vomiting that may contain blood
  • diarrhea that may contain frank blood or be dark and tarry
  • dark urine
  • fever
  • abnormal bleeding and bruising

Aflatoxins can also disrupt the immune system, damage the kidneys, cause cancer, and destroy red blood cells.

The 2005-2006 outbreak of aflatoxicosis in dogs was caused by contaminated corn. Corn products are routinely screened for aflatoxin prior to being included in pet foods, but in this case the Food and Drug Administration determined that the manufacturer did not adhere to its own testing guidelines. As a result, Diamond strengthened their monitoring program for incoming corn and started running additional tests for aflatoxin on their finished products.

To quickly identify potential cases of food-borne illnesses, veterinarians and regulatory officials need to know exactly what pets have been eating. Owners can usually identify the brand name of their dogs’ foods, but not other essential information like product dates and codes. This is just one of the reasons why I recommend that owners avoid removing food from its original packaging. If your pet’s food needs to be protected from the elements, vermin, or from inquisitive teeth and claws, place the entire bag within an appropriately sized storage container. Hopefully you’ll never need the detailed product information provided on the label but, if you do, at least you’ll know where to find it.

Dr. Jennifer Coates

Image: Got Caught by Desirae / via Flickr

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ABOUT NUTRITION NUGGETS

JENNIFER COATES, DVM

Photo of Jennifer

... graduated with honors from the Virginia-Maryland Regional College of Veterinary Medicine in 1999. In the years since, she has practiced veterinary medicine in Virginia, Wyoming, and Colorado. She is the author of several books about veterinary medicine and animal care, including the Dictionary of Veterinary Terms, Vet-Speak Deciphered for the Non-Veterinarian .

Jennifer also writes short stories that focus on the strength and importance of the human-animal bond and freelance articles relating to a variety of animal care and veterinary topics. Dr. Coates lives in Fort Collins, Colorado with her husband, daughter, and pets.

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