Canine rhinosporidiosis in Arkansas.

Rhinosporidiosis is a fungal infection caused by Rhinosporidium seeberi, a microorganism of complicated, undetermined life cycle. Many species of animals are susceptible to rhinosporidiosis, including human beings. The frequency of occurrence of the disease in domestic animals is unknown. A one-year-old male Collie dog from Northeast Arkansas was found to have rhinosporidiosis presenting as an intranasal polypoid mass. We believe this is the first documented report of rhinosporidiosis from the State of Arkansas.