The recent salmonellosis outbreak linked to ground turkey has spanned at least 31 states so far, reminding us all of the importance of maintaining excellent standards of food hygiene.

But it’s not just our food that’s at risk of infection. In recent years, increasing numbers of pet products have been recalled due to contamination or potential contamination.

In the past couple of years, pet food companies have issued almost three dozen pet food recalls due to salmonella concerns, as well as dog treats such as pigs ears, and treats made from salmon or beef. Just this week, Merrick Pet Care of Amarillo, TX, recalled 248 cases of Doggie Wishbone pet treats due to possible contamination with salmonella. Recently also, Nestlé Purina PetCare recalled some of its Purina One Vibrant Maturity dry cat food when it tested positive for salmonella.

 

 

Although the recent recalls were not associated with illness in people or pets, but rather were a consequence of salmonella detection due to random testing, experts warn that pet foods pose a definite risk of salmonellosis for animals and their owners. And indeed from 2006-2008, 79 people (32 of whom were children under 2 years old) were reported by the Centers for Disease Control and Prevention with salmonella infection associated with contact with dry cat and dog food. Although there were no fatalities, 11 of them were hospitalized.

“The problem of salmonella in pet foods and pet treats, even in pet supplements like vitamins, is something people should be aware of,” reports Dr. Casey Barton Behravesh, a veterinary epidemiologist at the Centers for Disease Control and Prevention.

The problem of contamination of food with salmonella occurs in the factory. In the case of dry food in particular, after processing, kibbles are sent to a room for coating with flavoring. This room provides a moist environment where bacteria can flourish, and salmonella organisms can seemingly persist on the food kibbles for many months.

Symptoms of food poisoning in pets are similar to those in people, and can involve lethargy, anorexia, fever, vomiting and bloody diarrhea for three to five days duration. The most common scenario, however, is the subclinical carrier state, where no signs are seen, but these animals serve as a reservoir of the bacteria.

 

10 TIPS FOR GUARDING AGAINST SALMONELLA INFECTION

A recent report in the Journal of the American Veterinary Medical Association offered recommendations on how owners can reduce the risk of salmonella infection in their pets and family:

  • Wash hands thoroughly before handling food and treats
  • Discourage children, elderly people, and immunosuppressed patient from handling pet food or treats
  • Avoid feeding raw food to pets
  • Avoid buying pet food if it’s container or packaging is damaged
  • Don’t feed anything to your pet that is malodorous or discolored – return it to the store if possible
  • Store pet food products somewhere cool and dry, and according to manufacturer’s guidelines
  • Keep the portion of the food package with the product code and date – in case it needs to be returned due to recall or taint
  • Wash your pet’s bowls and food scoops thoroughly in a sink that you don’t routinely use
  • Avoid feeding your pet in the kitchen
  • If buying pig ears, purchase only in sealed packages, not from open bulk bins

 

And finally, don’t forget to wash your hands after cleaning your cat’s litter box – salmonella organisms can live even after passing through your pet!

 

Kukanich KS (2011): Update on Salmonella spp. contamination of pet food, treats, and nutritional products, and safe feeding recommendations. JAVMA Jun 1; 238(11):1430-1434.

 

 

By now you’ve likely heard something about the outbreak of food-borne illness due to E. coli that is currently causing problems in Germany. This outbreak, reportedly the world’s largest due to E. coli, has so far killed 15 people and left more than 1000 others ill.

Although the exact source of the virulent strain of this bacterium remains unknown, the pathogen has been identified on cucumbers imported from Spain. Specifically it has been identified as Shiga toxin-producing E. coli (STEC) which causes Hemolytic Uremic Syndrome (HUS).

Vegetables, however, don’t have colons for colonization with this bacterium, so how did they become “infected”?

            

STEC and HUS

Most research on the epidemiology of STEC in animals has involved E. coli 0157:H7, and cattle are considered the major reservoir of the STEC that result in human infection. This strain is so widely distributed among cattle that it may likely be present periodically on most farms at some stage. Although this pathogen can only survive transiently in soil when shed by affected cattle, it is, however, capable of prolonged persistence in manure and environmental waters.

Consequently, polluted groundwaters may have been the source of the bacterium in this outbreak, and the vegetables were merely vectors of disease. That is, they provided a mechanical means of transporting the STEC into people.

HUS typically begins with an episode of bloody diarrhea following infection of the gastrointestinal tract with E.coli 0157:H7. This pathogen produces toxins that destroy red blood cells and cause kidney damage, resulting in a combination of hemolytic anemia, thrombocytopenia and acute renal failure. HUS therefore represents a medical emergency, and although the majority of patients recover from illness, mortality rate can be up to 10%, with children and the elderley being particularly at risk.

Growing Tension

Sadly this recent STEC/HUS outbreak has additionally spread to other northern European countries, and the situation is expected to further worsen in the coming week. Subsequently, diplomatic tension between Germany and countries such as Spain, France and Russia, is rising, as some countries have banned vegetable imports from Germany and Spain.

The German public has now been warned to avoid eating raw vegetables, such as lettuce, tomatoes and cucumbers, and some products have even been removed from store shelves.