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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

From: Antimicrobial resistance of Escherichia coli and Enterococcus spp. isolated from Estonian cattle and swine from 2010 to 2015

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)
  1. * Swedres-Svarm 2015. Consumption of antibiotics and occurrence of antibiotic resistance in Sweden. Solna/Uppsala ISSN 1650-6332, 117, Table 2.17
  2. ** 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