Monitoring fluoroquinolone resistance among ESBL-positive and ESBL-negative Escherichia coli strains isolated from urinary tract infections: An alert for empirical treatment.

Background: Bacterial resistance to extended-spectrum beta-lactamases (ESBL) is present worldwide. Empirical antibiotic therapy is often needed, and the use of fluoroquinolones, such as ciprofloxacin and norfloxacin, is common. This study aimed to analyze the urine cultures from 2,680 outpatients in January 2019, 2020, 2021, and 2022, with bacterial counts above 100,000 CFU/mL in which Escherichia coli was the etiological agent.

Prosthetic joint infection caused by an imipenem-resistant Mycobacterium senegalense.

Periprosthetic joint infection (PJI) remains one of the most common complications of total knee arthroplasty. Although mainly caused by Staphylococcus aureus and other Gram-positive microorganisms, occasionally, commensal or environmental bacteria are reported as causative agents of these infections. The present work aimed to report a case of PJI caused by an imipenem-resistant Mycobacterium senegalense strain.

Cutaneous infection by non-diphtheria-toxin producing and penicillin-resistant strain in a patient with diabetes mellitus.

Diphtheria is a potentially fatal infection, mostly caused by diphtheria toxin (DT)-producing strains. During the last decades, the isolation of DT-producing strains has been decreasing worldwide. However, non-DT-producing strains emerged as causative agents of cutaneous and invasive infections.