What the Research Actually Found

Hughes and colleagues conducted the first direct comparison study of bacterial colonisation between cloth and disposable scrub caps in active theatre environments (Hughes et al., 2026). Their findings were clear: reusable cloth caps showed a mean of 5.16 colony forming units compared to 1.06 for disposable caps.

The study sampled 107 theatre personnel across multiple specialties. Each participant wore their preferred cap style during normal theatre operations. The bacterial load was measured using a standardised scale from 0 (no growth) to 4 (full colonisation).

Disposable caps showed a mean growth rank of 0.20, whilst cloth caps averaged 0.93 — a statistically significant difference (p < 0.001). This represents the most robust evidence to date comparing bacterial loads between cap materials in real-world theatre settings.

The Detail Most Hospitals Miss

Here's what the researchers emphasised but many policy makers ignore: the issue isn't the fabric — it's the sterilisation. The study calls for "proper sterilisation of cloth scrub caps" rather than wholesale abandonment of reusable options.

Previous research shows that cloth caps can actually outperform disposables when properly managed. Studies have shown cloth caps are more effective at preventing airborne contamination when laundered according to proper protocols.

Many hospitals implementing disposable-only policies are solving the wrong problem. Instead of establishing proper laundering protocols, they're defaulting to single-use solutions that create environmental and financial costs whilst potentially compromising other aspects of infection control.

Why This Matters for Theatre Teams

This research arms theatre teams with concrete evidence for policy discussions. When administrators mandate disposable-only caps citing "infection prevention," we now have data showing the real issue is laundering standards, not material choice.

The study validates what many experienced theatre professionals already suspected: properly managed reusable caps can be as safe as disposables whilst offering superior comfort, fit, and environmental performance. Multiple infection control studies support this position.

For individual practitioners, this research emphasises the importance of following evidence-based laundering protocols. Washing at 60°C, using appropriate detergents, and ensuring complete drying cycles become safety measures, not just convenience factors.

Hospitals should focus on creating robust laundering systems rather than defaulting to disposable-only policies that may compromise overall infection control whilst dramatically increasing waste and costs.

Sources

Hughes, J., Pilc, E. M., Bridges, C., & Tuten, H. R. (2026). Surgeons' personal cloth scrub caps: harmless perk or implicit infection prevention risk? Patient Safety in Surgery. DOI: 10.1186/s13037-025-00465-9