Comparison of antibiotic resistance phenotypes in laboratory strains and clinical isolates of
Staphylococcus aureus,
Salmonella Typhimurium, and
Klebsiella pneumoniae.
Food Sci Biotechnol 2017;
26:1773-1779. [PMID:
30263717 DOI:
10.1007/s10068-017-0191-2]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/10/2017] [Accepted: 07/30/2017] [Indexed: 10/19/2022] Open
Abstract
This study was designed to evaluate the antibiotic resistance phenotypes in wild-type Staphylococcus aureus (WT-SA), oxacillin-induced S. aureus (OI-SA), clinically-acquired antibiotic-resistant S. aureus (CA-SA), wild-type Salmonella Typhimurium (WT-ST), ciprofloxacin-induced S. Typhimurium (CI-ST), clinically-acquired antibiotic-resistant S. Typhimurium (CA-ST), wild-type Klebsiella pneumoniae (WT-KP), ciprofloxacin-induced K. pneumoniae (CI-KP), and clinically-acquired antibiotic-resistant K. pneumoniae (CA-KP). The resistance of WT-SA, WT-ST, and WT-KP to ampicillin, ceftazidime, and cephalotin, penicillin was increased after induction by oxacillin OI-SA, ciprofloxacin CI-ST, and ciprofloxacin CI-KP, respectively. The highest β-lactamase activities were 12 and 36 μmol/min/ml, respectively, for CA-ST and CA-KP. The EtBr residues remained high in S. Typhimurium (>80%) and K. pneumoniae (>90%) when treated with CCCP. The distinct FT-IR spectra were observed in protein region (1700-1500 cm-1) and carbohydrate region (1200-900 cm-1). This study would provide useful information for better understating of specific resistance mechanisms in association with β-lactamase and efflux pump activities.
Collapse