Table 1.
Susceptibility testing (the disk diffusion method) and other differentiation tests for all staphylococci strains under study.
| Antimicrobial Agents or Tests | Staphylococci | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sa ATCC 25923 | Sa 1 | Sa 2 | Sa 3 | Sa 4 | Sa 5 | Sa 6 | Sa 7 | Sps ED99 | Sps 1 | Sps 2 | Sps 3 | Sps 4 | Sps 5 | Sps 6 | Sps 7 | Sps 8 | Sps 9 | Sps 10 | Sps 11 | Sps 12 | |
| Penicillins (penicillin G, amoxicillin) |
S | R | R | R | S | S | S | S | S | R | R | R | R | R | R | R | R | R | S | S | S |
| amoxicillin potentiated with clavulanic acid | S | R | R | R | S | S | S | S | S | R | R | R | R | R | R | R | R | S | S | S | S |
| Cephalosporins (cefalexin) |
S | R | R | R | S | S | S | S | S | R | R | R | R | R | R | R | R | S | S | S | S |
| tetracyclines (doxycycline, oxytetracycline) |
S | R | I | S | S | S | S | S | S | R | R | R | I | I | R | S | I | S | S | S | S |
| sulfamethoxazole potentiated with trimethoprim | S | R | I | I | S | S | S | S | S | R | R | I | R | R | R | R | I | I | S | S | S |
| Aminoglycosides (neomycin, gentamicin, amikacin) |
S | S | S | R | S | S | S | S | S | R | R | R | R | R | R | R | R | R | S | S | R |
| Quinolones (enrofloxacin, marbofloxacin, ciprofloxacin) |
S | R | I | R | S | S | S | S | S | R | R | R | R | R | R | R | R | S | R | S | S |
| polymyxins (polymyxin B) | R | R | R | R | R | R | R | R | S | S | S | S | S | S | S | S | S | S | S | S | S |
| cefoxitin (disk diffusion method) | S | R | R | R | S | S | S | S | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| oxacillin (disk diffusion method) | [S] | [R] | [R] | [R] | [S] | [S] | [S] | [S] | S | R | R | R | R | R | R | R | R | S | S | S | S |
| M-PCR (bp) |
359 | 359 | 359 | 359 | 359 | 359 | 359 | 359 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 | 926 |
| mecA | - | + | + | + | - | - | - | - | - | + | + | + | + | + | + | + | + | - | - | - | - |
| blaZ | - | + | + | + | - | - | - | - | - | + | + | + | + | + | + | + | + | + | - | - | - |
| coagulase (rabbit serum) |
+ | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
| Latex Agglutination Test | + | + | + | + | + | + | + | + | - | ± | ± | ± | ± | ± | ± | ± | ± | - | - | - | - |
| mannitol (anaerobic) | + | + | + | + | + | + | + | + | - | - | - | - | - | - | - | - | - | - | - | - | - |
Sa—Staphylococcus aureus; Sps—Staphylococcus pseudintermedius; R—resistant; I—intermediate; S—susceptible; [S] or [R]—only in disk diffusion method, the results for oxacillin are based on the results for cefoxitin; bp—base pairs; n/a—not applicable; +—positive result; (-)—negative result; ±—trace granularity.