RT Journal Article
T1 Characterization of persistent Listeria monocytogenes strains from ten dry- cured ham processing facilities
A1 D’Arrigo, Matilde
A1 Mateo-Vivaracho, Laura
A1 Guillamón, Eva
A1 Fernández León, María Fernanda
A1 Bravo Vázquez, Daniel Antonio
A1 Peirotén, Ángela
A1 Medina, Margarita
A1 García Lafuente, Ana
AB The majority of cases of listeriosis are associated with the consumption of contaminated food. Some strains of Listeria monocytogenes can persist over months or years in meat processing plants increasing the risk of product contamination. The presence of L. monocytogenes was examined in 10 dry-cured ham processing facilities. A total of 1801 samples were collected from environment and equipment, during processing (1095) and after cleaning and disinfection (706). These samples were taken from non-food contact (736) and food contact (1065) surfaces. In addition, 204 samples from ham surfaces were also analysed. Prevalence varied from 6% to 34% among facilities, and was higher during processing than after cleaning and disinfection (24.8% vs 11.0%) and from non-food than from food contact surfaces (22.6% vs 17.4%). L. monocytogenes serotype 1/2a was predominant (53.9%), followed by 1/2c (26.0%) and 1/2b (15.3%) and less frequently 4b (4.8%). A total of 142 different pulsotypes were registered. Potential persistent L.monocytogenes strains were isolated in 9 out the 10 facilities, with no more than 6 pulsotypes in a given plant. Two pulsotypes were common in different installations, detected before and after cleaning and disinfection, highlighting the importance of monitoring the presence of this pathogen in dry-cured ham processing environments.
SN 0740-0020
YR 2020
FD 2020
LK https://hdl.handle.net/20.500.14352/97435
UL https://hdl.handle.net/20.500.14352/97435
LA eng
NO D’Arrigo, Matilde, et al. «Characterization of Persistent Listeria Monocytogenes Strains from Ten Dry-Cured Ham Processing Facilities». Food Microbiology, vol. 92, diciembre de 2020, p. 103581. https://doi.org/10.1016/j.fm.2020.103581.
NO Consejo Superior de Investigaciones Científicas
DS Docta Complutense
RD 9 abr 2025