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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Prevalence and Populations of Listeria monocytogenes in Meat Products Retailed in Sao Paulo, Brazil

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Author(s):
Ristori, Christiane Asturiano [1] ; Gravato Rowlands, Ruth Estela [1] ; Martins, Cecilia Geraldes [1] ; Barbosa, Maria Luisa [1] ; Yoshida, Julia T. U. [1] ; de Melo Franco, Bernadette D. G. [2]
Total Authors: 6
Affiliation:
[1] Adolfo Lutz Inst, Food Microbiol Lab, BR-01246900 Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Food & Expt Nutr, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: FOODBORNE PATHOGENS AND DISEASE; v. 11, n. 12, p. 969-973, DEC 1 2014.
Web of Science Citations: 11
Abstract

This study evaluated the prevalence of the populations and serotypes of Listeria monocytogenes in 552 refrigerated samples of ground beef, chicken leg, hot dog, and pork sausage collected in supermarkets in the city of Sao Paulo, SP, Brazil, between May 2008 and July 2009. The supermarkets were selected after stratification by geographical region and by random draw. Tests for presence and enumeration of L. monocytogenes were based on ISO 11290-1:1996/Amd.1:2004 and ISO 11290-2:1998 methods, respectively. Listeria spp. were detected in 469 (85.0%) of the studied meat products. The most frequently isolated species was L. innocua (64.1%), followed by L. monocytogenes (48.7%), L. welshimeri (13.4%), L. seeligeri (7.1%), L. ivanovii (0.2%), and L. grayi subspecies murrayi (0.2%). L. monocytogenes was detected in 269 (48.7%) samples, with highest prevalence in ground beef (59.4%) followed by chicken legs (58.0%), pork sausages (39.8%), and hot dogs (37.7%). The populations were <10(2) colony-forming units/g in the majority of samples (62.5%). Prevalence of serotypes varied according to the type of meat product. These data are relevant for estimating the risks of listeriosis associated with consumption of meat products in Sao Paulo, and for establishing science-based intervention strategies aimed at reducing these risks, especially for pregnant women and immunocompromised individuals. (AU)