Artículo de revista
Different Transcriptional Responses from Slow and Fast Growth Rate Strains of Listeria monocytogenes Adapted to Low Temperature
Fecha
2016Registro en:
Frontiers in Microbiology March 2016 | Volume 7 | Article 229
1664-302X
DOI: 10.3389/fmich.2016.00229
Autor
Cordero Mattos, Ninoska
Maza, Felipe
Navea Pérez, Helen
Aravena, Andrés
Márquez Fontt, Bárbara
Navarrete Wallace, Paola
Figueroa Gronemeyer, Guillermo
González Canales, Mauricio
Latorre Mora, Mauricio
Reyes Jara, Angélica
Institución
Resumen
Listeria monocytogenes has become one of the principal foodborne pathogens worldwide. The capacity of this bacterium to grow at low temperatures has opened an interesting field of study in terms of the identification and classification of new strains of L. monocytogenes with different growth capacities at low temperatures. We determined the growth rate at 8 degrees C of 110 strains of L. monocytogenes isolated from different food matrices. We identified a group of slow and fast strains according to their growth rate at 8 degrees C and performed a global transcriptomic assay in strains previously adapted to low temperature. We then identified shared and specific transcriptional mechanisms, metabolic and cellular processes of both groups; bacterial motility was the principal process capable of differentiating the adaptation capacity of L. monocytogenes strains with different ranges of tolerance to low temperatures. Strains belonging to the fast group were less motile, which may allow these strains to achieve a greater rate of proliferation at low temperature.