Whole genome characterization of thermophilic Campylobacter species isolated from dairy manure in small specialty crop farms of Northeast Ohio

Frontiers in Microbiology

Microbiology

Hyein Jang¹  Uma S. Babu¹  Saritha Basa¹  Kannan V. Balan¹  Marianne Sawyer¹  Jayanthi Gangiredla¹  Lisa M. Harrison¹  Kelli L. Hiett¹  Gireesh Rajashekara²  Mike Kauffman²  Loic Deblais²  Jelmer W. Poelstra³ 

[1]Center for Food Safety and Applied Nutrition (CFSAN), Office of Applied Research and Safety Assessment (OARSA), U.S. Food and Drug Administration, Laurel, MD, United States

[2]Department of Animal Sciences, Center for Food Animal Health, The Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH, United States

[3]Molecular and Cellular Imaging Center, The Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH, United States

关键词: Campylobacter jejuni;    Campylobacter coli;    whole genome sequencing;    dairy manure;    small specialty crop farm;    resistome;    virulome;    prophage;   

DOI  :  10.3389/fmicb.2023.1074548

 received in 2022-10-19, accepted in 2023-01-30,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionWith more public interest in consuming locally grown produce, small specialty crop farms (SSCF) are a viable and growing segment of the food production chain in the United States.MethodsThe goal of this study was to investigate the genomic diversity of Campylobacter isolated from dairy manure (n = 69) collected from 10 SSCF in Northeast Ohio between 2018 and 2020.ResultsA total of 56 C. jejuni and 13 C. coli isolates were sequenced. Multi-locus sequence typing (MLST) identified 22 sequence types (STs), with ST-922 (18%) and ST-61 (13%) predominant in C. jejuni and ST-829 (62%) and ST-1068 (38%) predominant in C. coli. Interestingly, isolates with similar genomic and gene contents were detected within and between SSCF over time, suggesting that Campylobacter could be transmitted between farms and may persist in a given SSCF over time. Virulence-associated genes (n = 35) involved in the uptake and utilization of potassium and organic compounds (succinate, gluconate, oxoglutarate, and malate) were detected only in the C. jejuni isolates, while 45 genes associated with increased resistance to environmental stresses (capsule production, cell envelope integrity, and iron uptake) were detected only in the C. coli isolates. Campylobacter coli isolates were also sub-divided into two distinct clusters based on the presence of unique prophages (n = 21) or IncQ conjugative plasmid/type-IV secretion system genes (n = 15). Campylobacter coli isolates harbored genes associated with resistance to streptomycin (aadE-Cc; 54%) and quinolone (gyrA-T86I; 77%), while C. jejuni had resistance genes for kanamycin (aph3’-IIIa; 20%). Both species harbored resistance genes associated with β-lactam (especially, blaOXA-193; up to 100%) and tetracycline (tetO; up to 59%).Discussion/ConclusionOur study demonstrated that Campylobacter genome plasticity associated with conjugative transfer might provide resistance to certain antimicrobials and viral infections via the acquisition of protein-encoding genes involved in mechanisms such as ribosomal protection and capsule modification.

【 授权许可】

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Copyright © 2023 Deblais, Jang, Kauffman, Gangiredla, Sawyer, Basa, Poelstra, Babu, Harrison, Hiett, Balan and Rajashekara.