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. 2020 Feb 7;19(4):2449–2456. doi: 10.3892/etm.2020.8498

Figure 1.

Figure 1.

ESBL expression in Klebsiella pneumoniae isolated from a patient with pneumonia. (A) ESBL mRNA and protein expression levels were analyzed in NB-K.p and PD-K.p (B) Detection of the decomposition product by β-lactamase. (C) β-lactamase allowed PD-K.p to survive in an environment with penicillin-based antibiotics. (D) M/Z values as analyzed in NB-K.p and PD-K.p for penicillin. Data are presented as the mean ± SEM. **P<0.01, statistically significant difference. NB-K.p, natural being Klebsiella pneumoniae; PD-K.p, Klebsiella pneumoniae from a patient with pneumonia; ESBL, extended-spectrum β-lactamase.