For anyone who has spent time in an ICU — or has a loved one who has — catheter-associated infections represent one of the most preventable yet persistent threats to recovery. New microbial profiling data from Indonesian referral hospitals reveal just how formidable the organisms colonizing these devices have become, with resistance patterns that severely limit treatment options.
A cross-sectional analysis of 71 ICU patients with indwelling latex urinary catheters collected specimens over a six-month period ending March 2023. Laboratory identification uncovered 49 bacterial isolates and 28 yeast isolates. Escherichia coli, Acinetobacter baumannii, and Candida albicans dominated the pathogen landscape. Particularly striking were the resistance rates: 62.5% of Enterobacterales were extended-spectrum β-lactamase (ESBL) producers, rendering most penicillins and cephalosporins ineffective, while 90% of A. baumannii isolates demonstrated carbapenem resistance — a last-resort antibiotic class. Biofilm formation, confirmed via microtiter plate assay and scanning electron microscopy directly on catheter surfaces, was identified across multiple isolates, compounding infection persistence and treatment failure.
These findings sit within a deeply concerning global trend. Carbapenem-resistant A. baumannii has been designated a Priority 1 critical pathogen by the WHO precisely because therapeutic alternatives are scarce and mortality in bloodstream infections can exceed 50%. The concurrent prevalence of ESBL-producing Enterobacterales signals selective pressure from broad-spectrum antibiotic use — a cycle common in resource-intensive ICU environments. The biofilm dimension adds mechanistic weight: sessile bacteria within biofilms can tolerate antibiotic concentrations 100–1,000 times higher than their planktonic counterparts, explaining why catheter-associated infections so frequently recur despite systemic treatment. Key limitations include the modest cohort size, single-region geography limiting generalizability, and the cross-sectional design which precludes causal inference about resistance drivers. Nonetheless, the combination of high ESBL prevalence, near-total carbapenem resistance in A. baumannii, and confirmed biofilm architecture makes this an incrementally important data point reinforcing the urgency of catheter stewardship and antimicrobial resistance surveillance in Southeast Asian ICUs.