Equine-origin H3N8 has circulated in dogs in the United States since 1999. A genetically and antigenically distinct avian-origin H3N2 canine influenza was detected in March of 2015 in Chicago, Illinois. Subsequent outbreaks were reported with over 1,000 dogs in the Midwest affected followed by 23 additional states with detections within 5 months. The potential for canine-to-swine transmission was unknown. Experimental infection in pigs showed this virus does not replicate efficiently in swine.
Abente EJ, Anderson TK, Rajao DS, Swenson S, Gauger PC, Vincent AL; The Avian-Origin H3N2 Canine Influenza Virus that Recently Emerged in the United States has Limited Replication in Swine; Influenza Other Respir Viruses. 2016 Apr 25. doi: 10.1111/irv.12395. [Epub ahead of print] PMID: 27110913
Source: AASV