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First report of the isolation and molecular characterisation of Lactococcus garvieae in dairy cattle in Poland

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Jun 13, 2025

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Antimicrobial agents used in the study and antimicrobial susceptibilities of Lactococcus garvieae

Antimicrobial agent MIC range (mg/L)
Strain No. 5 Strain No. 13 Strain No. 64
MIC Interpretation MIC Interpretation MIC Interpretation
Benzylpenicillin 0.5 R 1 R 0.5 R
Clindamycin ≤ 1 R ≤1 R ≤1 R
Linezolid ≤2 S ≤2 S ≤2 S
Teicoplanin ≤0.12 S ≤0.12 S ≤0.12 S
Vancomycin 0.5 S 0.5 S 0.5 S
Tetracycline 0.5 S ≤16 R 0.5 S
Tigecycline ≤0.06 S ≤0.06 S ≤0.06 S
Moxifloxacin 0.5 S 0.5 S 0.5 S
Chloramphenicol 4 S 2 S 4 S
Rifampicin ≤4 R ≤4 R ≤4 R
Erythromycin ≤0.12 S ≤0.12 S ≤0.12 S
Trimethoprim-sulfamethoxazole ≤0.12 S ≤10 S ≤10 S

Results of basic local alignment search tool analysis

Bacterial strain No. Query coverage (%) Identity (%) GenBank sequence length (base pairs) Species Accession No.
5 95 98.74 1,471 Lactococcus garvieae LC377166.1
13 91 97.21 1,233 Lactococcus garvieae PP422542.1
64 88 85.16 895 Lactococcus garvieae MT000064.1

Groups of microorganisms identified in microbiological analyses

Isolates Number (n) % of all milk samples % of all strains
Micrococcus spp. 2 1.69 4.88
Enterococcus sp. 1 0.85 2.44
Streptococcus spp. 10 8.47 24.39
Lactococcus spp. 3 2.54 7.32
Corynebacterium sp. 1 0.85 2.44
Coagulase-negative staphylococci 18 15.25 43.90
Coagulase-positive staphylococci 5 4.24 12.20
Candida sp. 1 0.85 2.44
Contamination 1 0.85
No growth 76 64.41
Total 118 100 100
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