title: Characterization of atypical Listeria innocua isolated from swine slaughterhouses and meat markets.
abstract: Atypical Listeria innocua strains presenting phenotypic characteristics similar to those of Listeria monocytogenes were recently isolated from food and the environment. These isolates also tested positive for virulence genes specific to L. monocytogenes. Here we report the isolation of atypical hemolytic L. innocua strains from the environment of pork processing plants in Brazil. The strains were positive for L. monocytogenes virulence genes hly, inlA and inlB by PCR and presented genotypic similarities with human isolates of L. monocytogenes via the AFLP technique using HindIII single enzyme protocol. Phenotypic and genotypic similarities suggest that these atypical L. innocua may be pathogenic strains.
authors.affiliation: Laboratório de Sanidade Suína e Virologia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária, CEP: 05508 270 São Paulo, SP, Brazil. luzanolli@gmail.com
authors.forename: Luisa Zanolli
authors.initials: LZ
authors.lastname: Moreno
authors.forename: Renata
authors.initials: R
authors.lastname: Paixão
authors.forename: Debora Dirani
authors.initials: DD
authors.lastname: Gobbi
authors.forename: Daniele Cristine
authors.initials: DC
authors.lastname: Raimundo
authors.forename: Thais Porfida
authors.initials: TP
authors.lastname: Ferreira
authors.forename: Ernesto
authors.initials: E
authors.lastname: Hofer
authors.forename: Maria Helena
authors.initials: MH
authors.lastname: Matte
authors.forename: Andrea Micke
authors.initials: AM
authors.lastname: Moreno
mesh_terms: D000003:Abattoirs / Q000592:standards; D000818:Animals; D001938:Brazil; D005506:Food Contamination; D005511:Food Handling / Q000592:standards; D008087:Listeria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D008460:Meat / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D013552:Swine