Ionic and non-ionic intravenous X-ray contrast media: antibacterial agents?

Area of Science:

• Radiology and Microbiology
• Pharmacology of Diagnostic Agents

Background:

• X-ray contrast media have demonstrated inhibitory effects on bacterial growth, a feature historically overlooked.
• Ionic contrast media possess well-documented bacteriostatic and bactericidal properties, often attributed to free iodine content.
• Current clinical practice predominantly utilizes non-ionic contrast media, with less research on their antimicrobial effects.

Purpose of the Study:

• To review existing literature on the antibacterial (bactericidal and bacteriostatic) effects of X-ray contrast media.
• To investigate potential differences in these effects between ionic and non-ionic contrast media.
• To assess the current understanding of non-ionic contrast media's antimicrobial potential.

Main Methods:

• Systematic literature review of studies published between 1911 and 2019.
• Analysis of historical and contemporary research on contrast media and bacterial inhibition.
• Evaluation of evidence regarding the role of iodine concentration in antimicrobial effects.

Main Results:

• Bacteriostatic and bactericidal effects are established for ionic X-ray contrast media.
• Limited research exists on the antibacterial properties of non-ionic contrast media.
• The precise mechanism and magnitude of antibacterial effects for non-ionic agents remain inconclusive.

Conclusions:

• Non-ionic contrast media, despite limited research, may have potential applications for local antibacterial effects, e.g., in abscess drainage.
• Their use could potentially reduce the need for systemic antibiotics.
• Further research is warranted to elucidate the antibacterial mechanisms and clinical utility of non-ionic contrast media.