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Veterinary Public Health

Veterinary Public Health

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Veterinary Public Health Program
313 N Figueroa St. Rm 1127
Los Angeles, CA 90012
Tel (213) 989-7060
Tel: (877) 747-2243
Fax (213) 481-2375
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Canine Influenza – local cases

Outbreak of new strain of canine influenza in Midwest. 4.12.15



In June 2011, the Veterinary Public Health & Rabies Control Program was notified about four puppies that tested positive for Canine Influenza by PCR in the South Bay Area.   The puppies originally were turned in to a local animal shelter, where they were vaccinated against canine influenza (killed virus), in addition to Distemper, Hepatitis, Leptospirosis, Parainfluenza, Parvovirus (DHLPP) and Bordetella.  They were emaciated and tested positive for Demodex.  The puppies were then rescued and treated at a local veterinary hospital.  They had slight fevers when first examined, and developed a slight cough a week after entering the hospital.  PCR testing for canine influenza was performed on pharyngeal and conjunctival swabs collected on the first day of coughing.  Their illness was mild and recovery was seen within days. It remains unclear where the puppies contracted the infection.  There was no indication of a larger outbreak at the clinic.



In July  2007 a veterinarian in the San Gabriel Valley reported a cluster of respiratory disease associated with the dog boarding section of their facility.  A total of approximately 40 dogs became ill over a period of 3 weeks.  Exposure to canine influenza was confirmed by serologic testing in 5 of the cases. Vigorous infection control measures were implemented to control the outbreak. Most of the dogs had mild symptoms, although four dogs developed  pneumonia.  This outbreak appeared to be triggered after a puppy from Colorado, sick with pneumonia, was brought into the clinic. The canine influenza vaccine was not available in 2007, so none of the dogs had been vaccinated.



In September 2005, an Inglewood veterinarian confirmed four cases among dogs that had been at a single boarding facility at various times during August of that year. Veterinary Public Health conducted extensive surveillance for 6 months following that outbreak, but did not detect additional cases.

Canine Influenza causes a respiratory illness, with symptoms including cough, runny nose, fever, pneumonia and occasionally death. Dogs become ill 2 to 5 days after being exposed. The illness can last for weeks, but dogs are typically contagious for only 7 to 10 days. Many infected dogs may not show any signs, but are able to spread the disease.

Since dogs with Canine Influenza may present with symptoms similar to other common canine respiratory diseases, testing is needed to confirm a diagnosis. Acute ill dogs may be tested by PCR, while those that have been ill for several days would need to be tested by serology.

To determine whether canine influenza has become established in Los Angeles County, Veterinary Public Health is again requesting veterinarians to report any confirmed or suspect cases of Canine Influenza by faxing in a completed Canine Influenza Reporting Form. In addition, report any outbreaks of canine respiratory disease, whether or not a cause has been identified.

Article summarizing Challenges of Diagnosing Canine Influenza (H3N8) infection 11.10.11

Canine Influenza Case Reporting Form 2010
Canine Influenza Testing Information 2011
Canine Influenza Information for Dog Owners 2007
Nationwide Canine Influenza Statistics - Cornell Animal Diagnostic Laboratory
AVMA Information on Canine Influenza
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