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Occurrence and antimicrobial resistance of enterococci isolated from goat’s milk


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Antimicrobial agent resistance determinants of the Enterococcus faecalis and Enterococcus faecium isolates

Species Antimicrobial resistance gene content Number of R strains
VanA 0
Glycopeptides VanB 0 1
NP 80
tet(L) 0
tet(M) 43
E. faecalis (n = 80) Tetracyclines tet(W) 0 50
NP 37
ermB 4
Macrolides, vatD 0
lincosamides, 79
streptogramins vgaA 15
NP 62
VanA 0
Glycopeptides VanB 0 0
NP 30
tet(L) 0
tet(M) 0
Tetracyclines 3
E. faecium (n = 30) tet(W) 0
NP 30
ermB 1
Macrolides, vatD 0
lincosamides, 22
streptogramins vgaA 1
NP 28

Prevalence of enterococci resistant to antimicrobial agents isolated from raw goat’s milk samples

Antimicrobial agent Number (%) of resistant strains
E. faecalis (n = 80) E. faecium (n = 30) Enterococcus spp. (n = 86) Total (n = 196)
Ampicillin 1 (1.25) 1 (3.3) 0 (0) 2 (1)
Chloramphenicol 4 (5) 0 (0) 0 (0) 4 (2)
Ciprofloxacin 1 (1.25) 0 (0) 0 (0) 1 (0.5)
Daptomycin 0 (0) 0 (0) 4 (4.65) 4 (2)
Erythromycin 8 (10) 6 (20) 0 (0) 14 (7)
Gentamicin 1 (1.25) 0 (0) 0 (0) 1 (0.5)
Kanamycin 12 (15) 1 (3.3) 0 (0) 13 (6.6)
Lincomycin 79 (98.75) 22 (73.3) 1 (1.16) 102 (52)
Linezolid 0 (0) 0 (0) 0 (0) 0 (0)
Nitrofurantoin 2 (2.5) 9 (30) 0 (0) 11 (5.6)
Penicillin 0 (0) 0 (0) 0 (0) 0 (0)
Streptomycin 11 (13.75) 0 (0) 0 (0) 11 (5.6)
Teicoplanin 1 (1.25) 0 (0) 2 (2.33) 3 (1.5)
Tetracycline 50 (62.5) 3 (10) 6 (6.97) 59 (30)
Tigecycline 0 (0) 0 (0) 0 (0) 0 (0)
Tylosin 7 (8.75) 1 (3.3) 0 (0) 8 (4.1)
Quinupristin/Dalfopristin 80 (100) 2 (6.6) 19 (22.09) 101 (51.5)
Vancomycin 1 (1.25) 0 (0) 3 (3.48) 4 (2)

Species of enterococci isolated from raw goat’s milk samples

Species Number of raw goat milk samples
E. faecalis (n = 80) 62
E. faecium (n = 30) 23
Enterococcus spp. (n = 86) 67
E. faecalis + E. faecium 5
E. faecalis + Enterococcus spp. 13
E. faecium + Enterococcus spp. 2

Total 172

Frequency distribution of the resistance patterns of enterococci isolated from raw goat’s milk samples to antimicrobial agents

Antimicrobial resistance pattern Number (%) of isolates with antimicrobial resistance patterns
Total (n = 196) E. faecalis (n = 80) E. faecium (n = 30) Enterococcus spp. (n = 86)
No resistance 60 (30.6) 0 (0) 5 (16.7) 55 (64)
Single resistance 38 (19.4) 1 (1.3) 10 (33.3) 27 (31.4)
Multiple resistance 98 (50) 79 (98.7) 15 (50) 4 (4.6)
2 antimicrobials 43 (21.9) 28 (35) 11 (36.7) 4 (4.6)
3 antimicrobials 35 (17.9) 32 (40) 3 (10) -
4 antimicrobials 4 (2) 3 (3.75) 1 (3.3) -
5 antimicrobials 11 (5.6) 11 (13.75) - -
7 antimicrobials 2 (1) 2 (2.5) - -
8 antimicrobials 3 (1.5) 3 (3.7) - -
eISSN:
2450-8608
Language:
English
Publication timeframe:
4 times per year
Journal Subjects:
Life Sciences, Molecular Biology, Microbiology and Virology, other, Medicine, Veterinary Medicine