Deadly bacterial disease outbreak affecting dogs reported in San Diego



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Two dogs enjoying being off leash on Fiesta Island, May 21, 2019.

Photo by Andi Dukleth

Above: Two dogs enjoying being off leash on Fiesta Island, May 21, 2019.

An outbreak of leptospirosis, a contagious bacterial disease, has been reported in dogs in the area, the San Diego County Health and Human Services Agency said Thursday.

Since October, 34 confirmed and probable cases of leptospirosis have been documented in local dogs, mainly in the Hillcrest and Mission Hills areas. Several dogs had to be hospitalized and at least one was euthanized.

Boarding in kennels that allow dog-to-dog interaction is a major risk factor, although some sick dogs have only had contact with other dogs in dog parks. Kennels that were linked to the cases informed owners of all potential contacts of the diagnosed cases and closed for at least two weeks for cleaning and disinfection.

The signs of leptospirosis in dogs are varied and can include fever, muscle weakness, vomiting, diarrhea, loss of appetite, lack of energy, and frequent urination, which can be bloody.

No human cases have been linked to this outbreak in dogs, but anyone who develops fever, headache, muscle pain – especially in the back and calves – or other illness after contact with a sick dog should see their health care provider.

This week, the county sent a health notice to local doctors and veterinarians about the outbreak.

Leptospirosis is a disease caused by various species of spirochete bacteria called leptospira. These bacteria can infect several species of mammals, including humans, dogs, rats, mice, raccoons, skunks, and opossums. The bacteria spread in the urine of infected animals and can contaminate food, water, soil or bedding. Dogs and people can become infected through direct contact with abrasions of the skin, mucous membranes, or by drinking contaminated water.

“When dogs visit kennels and parks and play, lick and sniff each other, they are at risk of catching these bacteria,” said Dr Wilma Wooten, county public health official. “If your dog is showing signs, you should take him to your vet immediately.”

A vaccine is available to prevent leptospirosis in dogs, especially for those who stay in kennels and frequent dog parks.

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