Treatment and Prevention Tracheobronchitis of Dogs (Kennel cough)

Treatment: Preferably, affected dogs should not be hospitalized because the disease is usually highly contagious (and also self-limiting). Appropriate management practices, including good nutrition, hygiene, and nursing care, as well as correction of predisposing environmental factors, hasten recovery. Cough suppressants containing codeine derivatives, such as hydrocodone (0.25 mg/kg body wt, every 6-12 hr, PO) or butorphanol (0.05-0.1 mg/kg, every 6-12 hr, PO or SC), should be used only as needed to control persistent nonproductive coughing. Antibiotics are usually not needed except in severe chronic cases; cephalosporins, chloramphenicol, and tetracycline are preferable because they reach effective concentrations in the tracheobronchial mucosa. When needed, the antibiotic should be selected by culture and sensitivity tests of specimens collected by transtracheal aspiration or bronchoscopy. Antibiotics given PO or IM may not significantly reduce the numbers of B bronchiseptica in the distal trachea or major bronchi. Thus, in severely affected dogs that are not responsive to parenteral antibiotics, kanamycin sulfate (250 mg) or gentamicin sulfate (50 mg) diluted in 3 mL of saline may be administered by aerosolization b.i.d. for 3 days. Aerosolization treatment should be preceded by administration of bronchodilators. Endotracheal injection of antibiotics (eg, gentamicin) is a possible alternative to aerosolization. Corticosteroids may help alleviate clinical signs but should be used concurrently with an antibacterial agent; they are contraindicated in severely ill, coughing dogs.
Prevention: Dogs should be immunized with modified live virus vaccines against distemper, parainfluenza, and CAV-2, which also provides protection against CAV-1. Commercial products frequently combine these agents and often include modified live parvovirus and leptospiral antigen vaccines. An initial vaccination should be given at 6- 8 wk and repeated twice at 3- to 4-wk intervals until the dog is 14-16 wk old. Revaccination should be performed annually. When the risk of B bronchiseptica infection is considered to be significant, use of a live, avirulent, intranasal vaccine is preferable to parenteral products containing inactivated bacteria or bacterial extracts. A combination of an avirulent B bronchiseptica and a modified live parainfluenza vaccine is available for intranasal use. One inoculation is administered (intranasally) to puppies >3 wk old.

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