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Bacterial adherence and contamination during radiographic processing.

C E Bachman¹, J M White, H E Goodis

¹University of California, San Francisco.

Oral Surgery, Oral Medicine, and Oral Pathology

|November 1, 1990

Summary

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Bacterial contamination in radiographic processing rooms increases with clinical activity. While processing reduces bacteria on films, contamination risks persist due to bacteria surviving and multiplying in processing solutions, posing cross-contamination threats.

Area of Science:

Microbiology
Medical Imaging Technology
Infection Control

Background:

Oral fluids and environmental factors can contaminate radiographic processing equipment.
Maintaining a sterile environment in radiographic processing rooms is crucial for patient safety and diagnostic accuracy.

Purpose of the Study:

To quantify bacterial contamination in radiographic processing rooms during periods of high and low clinical activity.
To assess the impact of radiographic processing on bacterial survival and proliferation.
To evaluate the potential for cross-contamination in radiographic processing.

Main Methods:

Brain-heart infusion agar plates were used to culture bacteria near automatic processors during high and low clinical activity.
Surface samples were collected from various sites within the processing room (entrance, developer, fixer, water, exit).

Related Experiment Videos

Radiographic films were intentionally contaminated and processed to measure the effects on bacterial colony-forming units (CFUs) and processing solutions.

Main Results:

Bacterial colony-forming units (CFUs) in the clinical setting significantly increased with higher clinical activity.
Radiographic processing reduced CFUs on contaminated films but led to an increase in CFUs within all processing solutions.
Bacteria present on radiographic films demonstrated survival capabilities throughout the processing stages.

Conclusions:

Radiographic processing procedures, while reducing bacterial load on films, do not eliminate the risk of contamination.
The increase in bacterial counts within processing solutions indicates a potential for cross-contamination between films and equipment.
Continuous monitoring and improved protocols are necessary to mitigate bacterial contamination risks in radiographic processing environments.