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Listeria monocytogenes is the pathogen responsible for one of the most common zoonosis spread through contaminated food. It is characterized by a high capacity to withstand poor environmental conditions and to form biofilm. In general population it is most often a food-born infection, but it affects especially pregnant women, newborns, elderly and immunosuppressed persons, causing meningoencephalitis in these patients, and rarely, cardiac or osteoarticular conditions etc. Over time, both sporadic and outbreaks with broad geographic distribution have been described in Africa, Europe, or in the United States of America. Over the last 3 years, Europe has faced an increased number of cases of listeriosis, spread due to frozen vegetables (especially corn). Using molecular tests, serotype IVb with the ST6 multilocular sequence was identified as prevalent during this outbreak. The contamination source is a Hungarian company that packed and sold frozen vegetables on the market. The infectious strain persisted despite cleansing and disinfection measures. It was subsequently spread to other European Union (EU) countries. Even if the frozen vegetables were largely distributed in Europe (including Romania), and the strain was isolated in more countries, human listerios linked to these strains were registered only in 5 states. Considerable efforts are being made in order to try to stop the spread of this outbreak by improving the hygiene, disinfection and control measures, and by withdrawing potentially contaminated products from the market. [ABSTRACT FROM AUTHOR]