TABLE 4.
Resistance genes identified by BLAST query of 48 Mannheimia haemolytica whole genome sequences, with total number and percentage of isolates positive at arrival (n = 26) and 10 to 14 days later at revaccination (n = 22)
| Antimicrobial class | Gene | Timepoint | Gene positive (%) |
|---|---|---|---|
| Phenicols | floR | Arrival | 0 |
| Revaccination | 8 (36.4%) | ||
| β‐Lactams | bla‐OXA2 | Arrival | 0 |
| Revaccination | 22 (100%) | ||
| bla‐ROB1 | Arrival | 1 (3.8%) | |
| Revaccination | 18 (81.8%) | ||
| Tetracyclines | tetH/R | Arrival | 1 (3.8%) |
| Revaccination | 22 (100%) | ||
| Fluoroquinolones |
gyrA S83F gyrA D87N parC E84K |
Arrival | 0 |
| Revaccination | 22 (100%) | ||
| Macrolides |
erm42 msrE mphE |
Arrival | 0 |
| Revaccination | 22 (100%) |