No etiologic agent has been identified per the Pediatric Emergencies II research paper found on VIN — Veterinary Information Network — that his one Vet printed out for me.
B. pertussis is a strict human pathogen of recent evolutionary origin and is the primary
etiologic agent of whooping cough.
Combined, these negative data do not support XMRV as
the etiologic agent of the majority of CFS cases.
Human infection with
the etiologic agent of Lyme disease, Borrelia burgdorferi, results in disease of a few hallmark clinical signs and multifarious symptoms.
According to Dr. Lauren Johnson, of Southern Hills Veterinary Hospital in Tulsa, canine cough is a general term used to characterize a highly contagious cough that can be caused by one or several
etiologic agents and can either be bacterial or viral.