Table 3.
Proportion of resistance of Enterococcus faecalis and Enterococcus faecium isolates originating from faecal samples of healthy cattle and swine in 2010–2015 in Estonia
| Antimicrobial | Cut-off values for resistance (mg/L)* | Healthy animals | |||
|---|---|---|---|---|---|
| Dairy cattle (n = 51) | Swine (n = 60) | ||||
| % | (95% CI) | % | (95% CI) | ||
| Ampicillin | > 4 | 0.0 | NA | 1.7 | (− 1.6 to 5.0) |
| Erythromycin | > 4 | 21.6 | (10.3 to 21.9) | 26.7 | (15.5 to 37.9) |
| Virginiamycin | |||||
| E. faecalis | > 32 | 1.9 | (− 1.9 to 5.7) | 5.0 | (− 0.5 to 10.5) |
| E. faecium | > 4 | ||||
| Gentamycin | > 32 | 1.9 | (− 1.9 to 5.7) | 1.7 | (− 1.6 to 5.0) |
| Streptomycin** | |||||
| E. faecalis | > 512 | 11.7 | (2.9 to 20.5) | 35.0 | (22.9 to 47.1) |
| E. faecium | > 128 | ||||
| Kanamycin** | > 1024 | 3.9 | (− 1.4 to 9.2) | 26.7 | (1.5 to 37.9) |
| Tetracycline | > 4 | 33.3 | (20.4 to 46.2) | 40.4 | (27.6 to 52.4) |
| Chloramphenicol | > 32 | 1.9 | (− 1.9 to 5.7) | 6.7 | (0.8 to 13.3) |
| Vancomycin | > 4 | 5.9 | (− 0.63 to 9.4) | 10.0 | (2.4 to 17.6) |
| Narasin | > 2 | 3.9 | (− 1.4 to 9.2) | 3.3 | (− 1.2 to 7.8) |
| Bacitracin | > 32 | 3.9 | (− 1.4 to 9.2) | 6.6 | (0.4 to 13.3) |
| Linezolid | > 4 | 0.0 | NA | 1.7 | (− 1.6 to 5.0) |
* Swedres-Svarm 2015. Consumption of antibiotics and occurrence of antibiotic resistance in Sweden. Solna/Uppsala ISSN 1650-6332, 117, Table 2.17
** Statistically significant difference (P < 0.05) between resistant Enterococcus spp. isolates from healthy dairy cattle and swine. Corresponding percentages are also presented in italics face