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The characterization of Listeria spp . isolated from food products and the food-processing environment.
- Source :
-
Letters in Applied Microbiology . Nov2010, Vol. 51 Issue 5, p490-498. 9p. 1 Diagram, 2 Charts. - Publication Year :
- 2010
-
Abstract
- Aim: To enhance the information pertaining to the epidemiology of a collection of 378 Listeria spp . isolates obtained from several food-processing plants in Ireland over a 3- year period (2004-2007). Methods and results: The collection was characterized by pulsed-field gel electrophoresis (PFGE). The most prevalent pulse-type was PFGE profile I ( n = 14·5%) that consisted mainly of environmental Listeria spp. samples. Serotyping of 145 Listeria monocytogenes isolates was performed. The most common serovar was 1/2a and comprised 57·4% ( n = 77) of the L. monocytogenes collection. The other serovars were as follows: 4b (14·1%, n = 19), 1/2b (9·7%, n = 13), 4c (4·4%, n = 6) and 1/2c (6·7%, n = 9), respectively. Eleven isolates were identified as non- Listeria spp., the remaining ten L. monocytogenes isolates were nontypeable. The antimicrobial susceptibility testing revealed the antibiotic that isolates displayed the most resistance to was gentamicin (5%) followed by sulfamethoxazole-trimethoprim (2%), tetracycline and ciprofloxacin (1·5%). Conclusions: The subtyping has indicated the diversity of the Listeria spp. The presence of serotype 1/2a, 1/2b and 4b in both raw and cooked ready-to-eat food products is a public health concern, as these serotypes are frequently associated with foodborne outbreaks and sporadic cases of human listeriosis. In addition, the emergence of antimicrobial-resistant L. monocytogenes isolates could have serious therapeutic consequences. Significance and Impact of Study: The molecular subtyping and the further characterization of these isolates may be valuable particularly in the context of a suspected common source outbreak in the future. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LISTERIA
*SEROTYPING
*FOOD industry
*FOODBORNE diseases
*CIPROFLOXACIN
Subjects
Details
- Language :
- English
- ISSN :
- 02668254
- Volume :
- 51
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Letters in Applied Microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 54357639
- Full Text :
- https://doi.org/10.1111/j.1472-765X.2010.02928.x