Table 1 Summary of collection, isolation, and identification of S. aureus across different sample sources on 19 farmstead cheese producer farms in Vermont
Source | No. of farms sampled | No. of participants/ samples | Total isolates examined | Gram-positive, catalase-positive cocci isolated | Coagulase positive and nuc-positive isolates | Number of farms where S. aureus was isolated from this source | Notes |
|---|---|---|---|---|---|---|---|
Human | 19 | 41 humans (1 to 4 participants per farm) | 717 (352 isolates from hand swabs and 365 isolates from nasal swabs) | 580 (290 isolates from hand swabs and 290 isolates from nasal swabs) | 69 (12 isolates from hand swabs and 57 isolates from nasal swabs | 13 | S. aureus isolated from 15 humans |
BTM | 19 | 19 samples (1 per farm) | 211 | 187 | 36 | 12 | S. aureus isolated from 12 BTM samples |
CQM | 17 | 589 cows sampled (3–204 cows per herd) | 584 | 395 | 55 | 11 | S. aureus found in 44 quarters of 35 cows from 11 farms |
Dogs | 9 | 13 | 65 | 52 | 2 | 2 | 1 isolate lost to follow-up and the available one was not included in the analysis |
Total | 1577 | 1214 | 162 | The final total was 160 after removing dog isolates |