Fig. 3. Biofilm microstructure observations of Salmonella strains under scanning electron microscopy. (A) Non-treated multi-resistant Salmonella strain. (B) Non-treated CVCC528 strain. (C) Multi-resistant Salmonella strain with a 1/2 × MIC concentration of CIP. (D) Multi-resistant Salmonella strain with a 1/4 × MIC concentration of CIP. (E) Multi-resistant Salmonella strain with a 1/2 × MIC concentration of berberine. (F) Multi-resistant Salmonella strain with a 1/4 × MIC concentration of berberine. (G) Multi-resistant Salmonella strain with a 1/2 × FIC concentration of the berberine and CIP combination. (H) Multi-resistant Salmonella strain with a 1/4 × FIC concentration of the combination. MIC, minimal inhibition concentration; CIP, ciprofloxacin; FIC, fractional inhibitory concentration. Scale bars = 100 µm (A–H).
