Does Salmonella diarizonae 58:r:z53 Isolated from a Mallard Duck Pose a Threat to Human Health?

Salmonella diarizonae (IIIb) is frequently isolated from reptiles and less frequently from birds and mammals. However, its isolation from invasive human infections has not been widely reported. Migratory mallard ducks are excellent bioindicators of pathogen presence and pathogen antibiotic resistanc...

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Published in:International journal of molecular sciences 2024-05, Vol.25 (11), p.5664
Main Authors: Wódz, Karolina, Piechowicz, Lidia, Tokarska-Pietrzak, Ewa, Gawor, Jan, Gromadka, Robert, Bełkot, Zbigniew, Strzałkowska, Zuzanna, Wiśniewski, Jan, Nowak, Tomasz, Bogdan, Janusz, Anusz, Krzysztof, Pławińska-Czarnak, Joanna
Format: Article
Language:English
Subjects:
AMR
Antigens
Antimicrobial agents
Chromosomes
complete genome
Drug resistance
Genomes
Pathogens
Phylogenetics
plasmid
Plasmids
Proteins
Salmonella
Salmonella diarizonae 58:r:z53
sequencing
Virulence
wild duck
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Summary:Salmonella diarizonae (IIIb) is frequently isolated from reptiles and less frequently from birds and mammals. However, its isolation from invasive human infections has not been widely reported. Migratory mallard ducks are excellent bioindicators of pathogen presence and pathogen antibiotic resistance (AMR). We present the first isolation from a mallard duck in central Europe of the antibiotic-resistant Salmonella enterica subsp. diarizonae with the unique antigenic pattern 58:r:z53 and report its whole-genome sequencing, serosequencing, and genotyping, which enabled the prediction of its pathogenicity and comparison with phenotypic AMR. The isolated strain was highly similar to S. diarizonae isolated from humans and food. Twenty-four AMR genes were detected, including those encoding aminoglycoside, fluoroquinolone, macrolide, carbapenem, tetracycline, cephalosporin, nitroimidazole, peptide antibiotic, and disinfecting agent/antiseptic resistance. Six Salmonella pathogenicity islands were found (SPI-1, SPI-2, SPI-3, SPI-5, SPI-9, and SPI-13). An iron transport system was detected in SPI-1 centisome C63PI. Plasmid profile analyses showed three to be present. Sequence mutations in the invA and invF genes were noted, which truncated and elongated the proteins, respectively. The strain also harbored genes encoding type-III secretion-system effector proteins and many virulence factors found in S. diarizonae associated with human infections. This study aims to elucidate the AMR and virulence genes in S. enterica subsp. diarizonae that may most seriously threaten human health.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms25115664