Abstract
Whole-genome sequencing (WGS) has changed our understanding of bacterial pathogens, aiding outbreak investigations and advancing our knowledge of their genetic features. However, there has been limited use of genomics to understand antimicrobial resistance of veterinary pathogens, which would help identify emerging resistance mechanisms and track their spread. The objectives of this study were to evaluate the correlation between resistance genotypes and phenotypes for Staphylococcus pseudintermedius, a major pathogen of companion animals, by comparing broth microdilution antimicrobial susceptibility testing and WGS. From 2017–2019, we conducted antimicrobial susceptibility testing and WGS on S. pseudintermedius isolates collected from dogs in the United States as a part of the Veterinary Laboratory Investigation and Response Network (Vet-LIRN) antimicrobial resistance monitoring program. Across thirteen antimicrobials in nine classes, resistance genotypes correlated with clinical resistance phenotypes 98.4 % of the time among a collection of 592 isolates. Our findings represent isolates from diverse lineages based on phylogenetic analyses, and these strong correlations are comparable to those from studies of several human pathogens such as Staphylococcus aureus and Salmonella enterica. We uncovered some important findings, including that 32.3 % of isolates had the mecA gene, which correlated with oxacillin resistance 97.0 % of the time. We also identified a novel rpoB mutation likely encoding rifampin resistance. These results show the value in using WGS to assess antimicrobial resistance in veterinary pathogens and to reveal putative new mechanisms of resistance.
| Original language | English |
|---|---|
| Article number | 109006 |
| Journal | Veterinary Microbiology |
| Volume | 254 |
| DOIs | |
| State | Published - Mar 2021 |
Bibliographical note
Publisher Copyright:© 2021
Funding
We would like to acknowledge Jill Johnson, Brooke Adams, Teresa Register, Danielle Kenne, the Bacteria K State Group, Hannah Rawza, Tamara Gull, Jesse Bowman, Jana Morgan, Megan Fauls, Jasmin Huang, Leah Scarborough, Gianna Goldman, Megan Cleary, Noah Allen, Christian Holcomb, Donna Krouse, the members of the Clinical Microbiology Laboratory of the Texas A&M Veterinary Medical Teaching Hospital, Daniel Bradway, Tim Baszler, Rachel Olson, and Marla Francis. This work was supported by FDA Vet-LIRN grants 1U18FD006453 , 5U18FD006180 , 1U18FD006460-01 , 5U18FD006670-02 , 1U18FD006562 , 1U18FD006862 , 5U18FD006172 , 5U18FD006157 , 5U18FD006173 , 5U18FD006667-02 , AWD00007382 , 5U18FD006245 , U18FD006175A , 1U18FD006593-01 , U18-FD-006713 , 1U18FD004849-01 , 1U18FD006164 , 1U18FD006671 , 1U18FD006673-01 , 5U18FD006156 , 5U18FD006160-02 , 5U18FD006170-04 , 5U18FD006179 , 5U18FD006377 , 5U18FD006378 , 5U18FD006379 , 1U18FD006567 , U18FD006171 , U18FD005164 , U18FD006151 , U18FD006181 , U18FD006558 , 1U18FD006165-01 , 1U18FD0051544 , 1U18FD0051544 , 3U18FD005144 , 1U18FD006716 , 5U18FD006379 , 3U18FD005144 , 1U18FD006716 , 1U18FD006448 , 1U18FD006567 , 5U18FD006379 , 5U18FD006155-04 , and 5U18FD006712 . We would like to acknowledge Jill Johnson, Brooke Adams, Teresa Register, Danielle Kenne, the Bacteria K State Group, Hannah Rawza, Tamara Gull, Jesse Bowman, Jana Morgan, Megan Fauls, Jasmin Huang, Leah Scarborough, Gianna Goldman, Megan Cleary, Noah Allen, Christian Holcomb, Donna Krouse, the members of the Clinical Microbiology Laboratory of the Texas A&M Veterinary Medical Teaching Hospital, Daniel Bradway, Tim Baszler, Rachel Olson, and Marla Francis. This work was supported by FDA Vet-LIRN grants 1U18FD006453, 5U18FD006180, 1U18FD006460-01, 5U18FD006670-02, 1U18FD006562, 1U18FD006862, 5U18FD006172, 5U18FD006157, 5U18FD006173, 5U18FD006667-02, AWD00007382, 5U18FD006245, U18FD006175A, 1U18FD006593-01, U18-FD-006713, 1U18FD004849-01, 1U18FD006164, 1U18FD006671, 1U18FD006673-01, 5U18FD006156, 5U18FD006160-02, 5U18FD006170-04, 5U18FD006179, 5U18FD006377, 5U18FD006378, 5U18FD006379, 1U18FD006567, U18FD006171, U18FD005164, U18FD006151, U18FD006181, U18FD006558, 1U18FD006165-01, 1U18FD0051544, 1U18FD0051544, 3U18FD005144, 1U18FD006716, 5U18FD006379, 3U18FD005144, 1U18FD006716, 1U18FD006448, 1U18FD006567, 5U18FD006379, 5U18FD006155-04, and 5U18FD006712.
| Funders | Funder number |
|---|---|
| Clinical Microbiology Laboratory of the Texas A&M Veterinary Medical Teaching Hospital | |
| FDA Vet-LIRN | 1U18FD006165-01, U18FD005164, 5U18FD006160-02, 1U18FD006593-01, 5U18FD006180, U18FD006151, 1U18FD006673-01, 1U18FD004849-01, U18FD006558, 1U18FD006453, 1U18FD0051544, 1U18FD006671, U18-FD-006713, 1U18FD006716, 5U18FD006379, U18FD006171, 5U18FD006712, AWD00007382, 5U18FD006156, 5U18FD006670-02, 5U18FD006378, 5U18FD006157, 5U18FD006179, 5U18FD006377, 5U18FD006173, 5U18FD006172, 1U18FD006460-01, 5U18FD006667-02, 1U18FD006862, U18FD006175A, 1U18FD006562, 1U18FD006164, U18FD006181, 3U18FD005144, 5U18FD006155-04, 1U18FD006448, 5U18FD006170-04, 1U18FD006567, 5U18FD006245 |
| U.S. Food and Drug Administration | U18FD006245 |
Keywords
- Antimicrobial resistance
- Genomics
- Staphylococcus pseudintermedius
ASJC Scopus subject areas
- Microbiology
- General Veterinary