## 3 Results
### Determination of the Minimum Inhibitory Concentration  
As reported in Table 1, all _E. facicum_ strains were resistant to Vancomycin (8 \(\mu\)g/mL), while only one of these presented a resistance to Ampicillin and Erythromycin (16 \(\mu\)g/mL). _E. avium_ and _E.urans_, following EUCAST guidelines, were tested only against Ampicillin and Vancomycin, to which they were sensitive (Table 2). All 13 _S. aureus_ strains were sensitive to Amikacina. Only _S. aureus_ S29 and S41 were sensitive to Ciprofloxacinacin, while the other 11 strains showed a \"Susceptible, increased exposure\" (MIC value at the breakpoint). Only one isolate (_S. aureus_ S26) is endowed with a multi-resistance to Erythromycin (2 \(\mu\)g/mL) and Oxacillin (4 \(\mu\)g/mL). It is important to note that most isolates presented a \"Susceptible, increased exposure\" profile (Table 3). In relation to the psychotrophic bacteria, the five _Listeria_ isolates (Table 4) were resistant to Erythromycin. In relation to Tetracycline, all _L. ivanovii londoniensis_ showed a \"Susceptible, increased exposure\" profile, while _L. welshimeri_ was resistant to the compound, with MIC value of 4 \(\mu\)g/mL. Four strains (3 strains of _L. ivanovii_ spp. _londoniensis_ with a value of 2 \(\mu\)g/mL and _L. welshimeri_ with value of 4 \(\mu\)g/mL) was resistant to Ampicillin. The two strains of _A. hydrophilia_ were evaluated only against Imipenem to which they were resistant, with values of 2 \(\mu\)g/mL. Whereas _Y. enterocolitica_ showed a \"Susceptible, \begin{table}
\begin{tabular}{l c c c c c} \hline \hline
**Strains** & **Ciprofloxacinacin** & **Tetracycline** & **Ampicillin** & **Eythromycin** & **Vancomycin** \\ \hline _E. facicum_ EC1 & 4 \(\mu\)g/mL & 1 \(\mu\)g/mL & 16 \(\mu\)g/mL & 16 \(\mu\)g/mL & 8 \(\mu\)g/mL \\ _E. facicum_ EC2 & 4 \(\mu\)g/mL & 1 \(\mu\)g/mL & 4 \(\mu\)g/mL & 4 \(\mu\)g/mL & 8 \(\mu\)g/mL \\ _E. avium_ EC16 & / & / & 1 \(\mu\)g/mL & / & 2 \(\mu\)g/mL \\ _E. durans_ EC17 & / & / & 2 \(\mu\)g/mL & / & 2 \(\mu\)g/mL \\ BREAKPOINT & \(\geq\)8 \(\mu\)g/mL & \(\geq\)4 \(\mu\)g/mL & \(\geq\)8 \(\mu\)g/mL & \(\geq\)4 \(\mu\)g/mL \\ \hline \hline \end{tabular}
\end{table} 
Table 2: MIC values for _Enterococci_ strains and their Break Point values. \begin{table}
\begin{tabular}{l c c c c c} \hline \hline
**Strains** & **Amikacin** & **Ciprofloxacinacin** & **Eythromicin** & **Vancomycin** & **Oxacillin** \\ \hline _S. aureus_ S26 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 2 \(\mu\)g/mL & 1 \(\mu\)g/mL & 4 \(\mu\)g/mL \\ _S. aureus_ S28 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _S. aureus_ S29 & 1 \(\mu\)g/mL & 0.25 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. aureus_ S31 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. aureus_ S32 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. aureus_ S33 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. [PERSON]_ S34 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. [PERSON]_ S35 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 1 \(\mu\)g/mL \\ _[PERSON]. [PERSON]_ S36 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ _[PERSON]. [PERSON]_ S37 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 1 \(\mu\)g/mL \\ _S. aureus_ S41 & 1 \(\mu\)g/mL & 0.25 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 1 \(\mu\)g/mL \\ _S. aureus_ S42 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL \\ _S. aureus_ S43 & 1 \(\mu\)g/mL & 1 \(\mu\)g/mL & 0.5 \(\mu\)g/mL & 2 \(\mu\)g/mL & 2 \(\mu\)g/mL \\ BREAKPOINT & \(\geq\)16 \(\mu\)g/mL & \(\geq\)1 \(\mu\)g/mL & \(\geq\)1 \(\mu\)g/mL & \(\geq\)2 \(\mu\)g/mL & \(\geq\)2 \(\mu\)g/mL \\ \hline \hline \end{tabular}
\end{table} 
Table 3: MIC values for _Staphylococcus aureus_ strains and their Break Point values.