Acinetobacter seifertii is a recently described species that belongs to the Acinetobacter calcoaceticus-Acinetobacter baumannii complex. It has been recovered from clinical samples and is sometimes associated with antimicrobial resistance determinants. We present here the case of three A. seifertii clinical isolates which were initially identified as Acinetobacter sp. by phenotypic methods but no identification at the species level was achieved using semi-automated identification methods. The isolates were further analysed by whole genome sequencing and identified as A. seifertii. Due to the fact that A. seifertii has been isolated from serious infections such as respiratory tract and bloodstream infections, we emphasize the importance of correctly identifying isolates of the genus Acinetobacter at the species level to gain a deeper knowledge of their prevalence and clinical impact.

Faculty of Biochemistry and Pharmacy Universidad Mayor de San Simón Avenida Aniceto Arce s n frente al parque La Torre Cochabamba Bolivia

Faculty of Medicine and Nursing; Immunology Microbiology and Parasitology University of the Basque Country UPV EHU Barrio Sarriena s n 48940 Bilbao Spain

German Centre for Infection Research Partner Site Bonn Cologne Cologne Germany

Institute for Medical Microbiology Immunology and Hygiene University of Cologne Goldenfelstrasse 19 21 50935 Cologne Germany

Laboratory of Bacterial Genetics National Institute of Public Health Šrobárova 48 100 42 Prague Czech Republic

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