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Summary
Listeria monocytogenes was frequently found in soil and vegetation on farms during spring. This common bacterium was not detected in any autumn samples, suggesting seasonal variations in its environmental presence.
Area of Science:
- Environmental microbiology
- Food safety science
Background:
- Listeria monocytogenes is a significant foodborne pathogen.
- Understanding its environmental reservoirs is crucial for food safety.
Purpose of the Study:
- To investigate the prevalence of L. monocytogenes in agricultural and nonagricultural environments.
- To assess seasonal variations in environmental L. monocytogenes contamination.
Main Methods:
- Environmental sampling from 12 farms and 7 nonagricultural sites.
- Bacteriological analysis for L. monocytogenes isolation.
- Sampling conducted during spring and early autumn seasons.
Main Results:
- L. monocytogenes was detected in soil/vegetation from 11 of 12 farms.
- The bacterium was also found at 6 of 7 nonagricultural sites.
- No L. monocytogenes strains were isolated from any site during autumn collections.
Conclusions:
- Soil and vegetation represent significant reservoirs for L. monocytogenes in agricultural settings.
- Environmental contamination by L. monocytogenes exhibits seasonal patterns, being more prevalent in spring than autumn.