[A strain of Aeromonas veronii isolated from a patient suspected of cholera].

Investigations were carried on a strain isolated from patient hospitalized in Poland. The patient returned from Odessa, a region with cholera epidemic. The strain was suspected to be Vibrio cholerae, but it did not agglutinate in V. cholerae 01 serum. The aim of this study was establishment of taxonomical classification of this strain, in order to demonstrate whether it is a representative of the non-cholera vibrio group (not agglutinating) or another representative of the family Vibrionaceae. The strain was resistant to bile salts in TCBS medium and demonstrated several properties from a borderline of two Vibrio and Aeromonas species. Its properties were similar to the group of recently described pathogenic vibrio, but it did not require higher concentrations of NaCl in the medium and was resistant to the vibriostatic factor 0/129. These properties were considered as decisive in differentiation of Vibrio and Aeromonas. The strain was finally classified as Aeromonas veronii. It is a first case in Poland of isolation of A. veronii from the feces of patient with cholera-like symptoms. As newly described pathogenic species of genus Vibrio and Aeromonas were not isolated in Poland, we present schemes which may serve for beginning of this type of diagnostic investigations.