Weissella confusa: problems with identification of an opportunistic pathogen that has been found in fermented foods and proposed as a probiotic

摘要: Weissella confusa is found in fermented foods and has been suggested as a probiotic, but also causes sepsis other serious infections humans animals. The incidence of human underestimated partly due to confusion with viridans streptococci difficulty making definitive identification, even if the organism recognized belong another genus, owing inability commercial systems identify it. We report our experiences identifying W. isolated from two immune-compromised patients, both whom developed this organism. Two gram positive MicroScan combination panels, could not because they did have their data bases, provide false identification. base RapID™ Str panel (Remel), which gave three incorrect, high probability results (≥ 95%). 16S rDNA sequencing identified isolates confusa. Maldi-Tof, performed by reference laboratories, correctly isolates.