Listeria spp. are a group of aerobic and non-spore forming gram-positive bacilli. They are present in the environment, soil, and water. Listeria spp. have also been noted to be present as a normal intestinal flora of animals. Human infections with Listeria spp. have not been frequently reported, mostly because of the difficulty in laboratory identification and complex clinical presentations. In humans, Listeria spp. have been frequently responsible for food poisoning and neonatal meningitis. In 1 Feb 2016, Alexander Muacevic and John R Adler published an article which title is “Human Listeriosis Presenting as Breast Abscess: Report of a Rare Case”, reported a rere case about breast abscess which presented by Listeriosis. In the article, the writers appealed that in the era of multidrug resistance, isolation and identification of the causative microbe and testing for antimicrobial susceptible patterns assume greater significance for the better management of patients, thereby reducing the resultant morbidity and mortality.
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