Kennel cough is a common name used to describe infectious tracheobronchitis in dogs. The bacterium Bordetella bronchiseptica plays a major role in most cases. Other viral and bacterial agents can also be involved. Canine parainfluenza is believed to be the most viral pathogen isolated from clinical cases. The intranasal vaccines, (such as Intra Trac II) have been shown to be helpful in preventing kennel
cough in puppies, and can be given as early as 3 weeks of age.