RESUMO
Eighty isolates of Listeria monocytogenes cultured from human infections in Hungary between 2004 and 2012 were serotyped by the PCR technique of Doumithet al. [9] and characterised by pulsed-field gel electrophoresis (PFGE). Most of the isolates belonged to two serogroups: 53 isolates (66.3%) to serovar group 4b,4d,4e and 21isolates (25.8%) to serogroup 1/2a,3a. Although many pulsotypes were identified a particular pulsotype proved highly excelling comprising of 31 isolates after digestion by both ApaI and AscI restriction enzymes. All strains from this pulsotype belonged toserovar group 4b,4d,4e. Interestingly 24% of isolates from invasive samples(cerebrospinal fluid, blood) belonged to two distinct pulsotypes in the less common serovar group 1/2a,3a. Several small clusters of cases caused by isolates with identical pulsotypes were identified.