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Volume 9
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10.3390/pathogens9100802
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Article

First Report on the Finding of Listeria mnocytogenes ST121 Strain in a Dolphin Brain

by
Yann Sévellec
1,
Marina Torresi
2,
Benjamin Félix
1,
Féderica Palma
1,
Gabriella Centorotola
2,
Stefano Bilei
3,
Matteo Senese
3,
Giuliana Terracciano
3,
Jean-Charles Leblanc
1,
Francesco Pomilio
2 and
Sophie Roussel
1,*
1
Maisons-Alfort Laboratory for Food Safety, Salmonella and Listeria Unit, University of Paris-Est, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 94700 Maisons-Alfort, France
2
Italian National Reference Laboratory for Listeria monocytogenes, Istituto Zooprofilattico Sperimentale dell’Abruzzo e Molise “G. Caporale”, IZSAM, 64100 Teramo, Italy
3
Istituto Zooprofilattico Sperimentale del Lazio e della Toscana M. Aleandri, 00178 Rome, Italy
*
Author to whom correspondence should be addressed.
Pathogens 2020, 9(10), 802; https://doi.org/10.3390/pathogens9100802
Submission received: 4 September 2020 / Revised: 18 September 2020 / Accepted: 22 September 2020 / Published: 28 September 2020
(This article belongs to the Section Waterborne/Foodborne/Airborne Pathogens)
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Abstract

Listeria monocytogenes (Lm) is a ubiquitous bacterium that causes the foodborne illness, listeriosis. Clonal complexes (CC), such as CC121, are overrepresented in the food production industry, and are rarely reported in animals and the environment. Working within a European-wide project, we investigated the routes by which strains are transmitted from environments and animals to food and the food production environment (FPE). In this context, we report, for the first time, the occurrence of a ST121 (CC121) strain isolated from a dolphin brain. The genome was compared with the genomes of 376 CC121 strains. Genomic comparisons showed that 16 strains isolated from food were the closest to the dolphin strain. Like most of the food strains analyzed here, the dolphin strain included genomic features (transposon Tn6188, plasmid pLM6179), both described as being associated with the strain’s adaptation to the FPE. Like all 376 strains, the dolphin strain contained a truncated actA gene and inlA gene, both described as being associated with attenuated virulence. Despite this fact, the strain was able to cross blood-brain barrier in immunosuppressed dolphin exposed polychlorinated biphenyl and invaded by parasites. Our data suggest that the dolphin was infected by a food-related strain released into the Mediterranean Sea.
Keywords: Listeria monocytogenes; ST121; dolphin; wildlife; food; genomic comparison Listeria monocytogenes; ST121; dolphin; wildlife; food; genomic comparison

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MDPI and ACS Style

Sévellec, Y.; Torresi, M.; Félix, B.; Palma, F.; Centorotola, G.; Bilei, S.; Senese, M.; Terracciano, G.; Leblanc, J.-C.; Pomilio, F.; et al. First Report on the Finding of Listeria mnocytogenes ST121 Strain in a Dolphin Brain. Pathogens 2020, 9, 802. https://doi.org/10.3390/pathogens9100802

AMA Style

Sévellec Y, Torresi M, Félix B, Palma F, Centorotola G, Bilei S, Senese M, Terracciano G, Leblanc J-C, Pomilio F, et al. First Report on the Finding of Listeria mnocytogenes ST121 Strain in a Dolphin Brain. Pathogens. 2020; 9(10):802. https://doi.org/10.3390/pathogens9100802

Chicago/Turabian Style

Sévellec, Yann, Marina Torresi, Benjamin Félix, Féderica Palma, Gabriella Centorotola, Stefano Bilei, Matteo Senese, Giuliana Terracciano, Jean-Charles Leblanc, Francesco Pomilio, and et al. 2020. "First Report on the Finding of Listeria mnocytogenes ST121 Strain in a Dolphin Brain" Pathogens 9, no. 10: 802. https://doi.org/10.3390/pathogens9100802

APA Style

Sévellec, Y., Torresi, M., Félix, B., Palma, F., Centorotola, G., Bilei, S., Senese, M., Terracciano, G., Leblanc, J.-C., Pomilio, F., & Roussel, S. (2020). First Report on the Finding of Listeria mnocytogenes ST121 Strain in a Dolphin Brain. Pathogens, 9(10), 802. https://doi.org/10.3390/pathogens9100802

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