| Autor: |
Palacios‐Gorba, Carla, Moura, Alexandra, Gomis, Jesús, Leclercq, Alexandre, Gómez‐Martín, Ángel, Bracq‐Dieye, Hélène, Mocé, María L., Tessaud‐Rita, Nathalie, Jiménez‐Trigos, Estrella, Vales, Guillaume, García‐Muñoz, Ángel, Thouvenot, Pierre, García‐Roselló, Empar, Lecuit, Marc, Quereda, Juan J. |
| Předmět: |
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| Zdroj: |
Environmental Microbiology; Dec2021, Vol. 23 Issue 12, p7617-7631, 15p |
| Abstrakt: |
Summary: Studies have shown that ruminants constitute reservoirs of Listeria monocytogenes, but little is known about the epidemiology and genetic diversity of this pathogen within farms. Here we conducted a large‐scale longitudinal study to monitor Listeria spp. in 19 dairy farms during three consecutive seasons (N = 3251 samples). L. innocua was the most prevalent species, followed by L. monocytogenes. Listeria monocytogenes was detected in 52.6% of farms and more frequently in cattle (4.1%) and sheep (4.5%) than in goat farms (0.2%). Lineage I accounted for 69% of L. monocytogenes isolates. Among animal samples, the most prevalent sublineages (SL) and clonal complexes (CC) were SL1/CC1, SL219/CC4, SL26/CC26 and SL87/CC87, whereas SL666/CC666 was most prevalent in environmental samples. Sixty‐one different L. monocytogenes cgMLST types were found, 28% common to different animals and/or surfaces within the same farm and 21% previously reported elsewhere in the context of food and human surveillance. Listeria monocytogenes prevalence was not affected by farm hygiene but by season: higher prevalence was observed during winter in cattle, and during winter and spring in sheep farms. Cows in their second lactation had a higher probability of L. monocytogenes faecal shedding. This study highlights dairy farms as a reservoir for hypervirulent L. monocytogenes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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