Role of Aeromonas Isolated from Feces of Finnish Patients

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Abstract
Aeromonas species were isolated from 249/13,027 (1.9%) stool samples submitted to the Dept. of Bacteriology and Immunology, University of Helsinki, during 1 year, to be cultured for bacterial enteropathogens. Aeromonas was the third most common enteropathogen isolated, after campylobacter (3.6%) and salmonella (3.3%). Isolates and clinical information from 234 Aeromonas patients were available for further study. A. caviae (41%), A. hydrophila (27%), and A. veronii biovar sobria (22%) were the most frequent isolates. In 15% of the patients, other enteropathogens were found along with aeromonas. Only 2% of all aeromonas-positive patients were found to be asymptomatic, whereas no aeromonas isolates were detected in the stools of 343 asymptomatic individuals. Almost all (96%) patients with aeromonas in their feces had gastroenteritis. Patients infected with A. veronii biovar sobria had a shorter illness course and had more often travelled abroad. In conclusion, Aeromonas spp. were found to be a potential cause of diarrhea in Finnish patients.