Microbial colonization of ossicles after HHP treatment (350 MPa, 10 minutes) with and without the addition of antibiotics to the media.

All bacterial strains listed above were detected by conventional culture techniques. A combination of vancomycin (11.1 µg/ml), clindamycin (0.75 µg/ml) and imipenem (3.7 µg/ml) was added to samples 1 to 3. A combination of cefuroxime (11.1 µg/ml), gentamicin (44.4 µg/ml) and imipenem (3.7 µg/ml) was added to samples 4 to 6. See Table 2 for an explanation of the symbols used.