Journals / Bozok Tıp Dergisi / 2025 / Cilt: 15 Sayı: 4

In Vitro Evaluation of the Effects of Iodinated Contrast Agents on Gut Microbiota

İyotlu Kontrast Ajanların Bağırsak Mikroorganizmaları Üzerindeki Etkilerinin İn Vitro Değerlendirilmesi

Nisa Başpinar(Sivas Cumhuriyet University ,Faculty of Medicine)0000-0003-4240-6001
Damla Bağdu Çimen(SIVAS CUMHURIYET UNIVERSITY)0009-0001-6298-991X
Zeynep Sümer(SIVAS CUMHURIYET UNIVERSITY)0000-0002-1520-3359
İsmail Şalk(SIVAS CUMHURIYET UNIVERSITY)0000-0002-5156-6923
Pages
502–506
Publication Date
2025-12-15
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These findings suggest that these agents are unlikely to directly affect gut microbial viability in the short term, supporting their safety in terms of maintaining normal intestinal microbial populations during routine diagnostic procedures.

📌 3 Key Takeaways

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Objective & Hypothesis:Aim: The aim of this study was to investigate whether commonly used iodinated contrast agents exert bacteriostatic or bactericidal effects on selected commensal and opportunistic microorganisms that constitute the gut microbiota.
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Key Findings & Data:Each strain was exposed to five different iodinated contrast agentsat five dilution levels (1/1, 1/2, 1/4, 1/8, and 1/16).
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Conclusion & Impact:These findings suggest that these agents are unlikely to directly affect gut microbial viability in the short term, supporting their safety in terms of maintaining normal intestinal microbial populations during routine diagnostic procedures.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:İyotlu kontrast ajanlar · bağırsak mikrobiyotası · antimikrobiyal etkiler

Abstract

Aim: The aim of this study was to investigate whether commonly used iodinated contrast agents exert bacteriostatic or bactericidal effects on selected commensal and opportunistic microorganisms that constitute the gut microbiota. Given the widespread use of these agents in diagnostic imaging, understanding their potential impact on microbial viability is of clinical importance. Method: Strains of Candida spp., Lactobacillus spp., Staphylococcus epidermidis, Enterococcus spp., and Escherichia coli were cultured under standard laboratory conditions. Each strain was exposed to five different iodinated contrast agentsat five dilution levels (1/1, 1/2, 1/4, 1/8, and 1/16). Antimicrobial activity was assessed using the disk diffusion method, a widely accepted in vitro technique for evaluating the inhibitory effects of chemical agents on microbial growth. All cultures were incubated aerobically at 37°C for periods ranging from 18 to 48 hours, depending on the growth characteristics of each microorganism. Results: None of the tested contrast agents showed detectable bacteriostatic or bactericidal effects against any of the microorganisms at any dilution level. Growth patterns of all strains were consistent across different agent types and concentrations, indicating no inhibition of microbial proliferation. Conclusion: Under controlled in vitro conditions, the iodinated contrast agents tested did not demonstrate any antimicrobial activity against selected gut microorganisms. These findings suggest that these agents are unlikely to directly affect gut microbial viability in the short term, supporting their safety in terms of maintaining normal intestinal microbial populations during routine diagnostic procedures.

Özet

Amaç: Bu çalışmanın amacı, yaygın olarak kullanılan iyotlu kontrast ajanlarının, bağırsak mikrobiyotasını oluşturan seçilmiş kommensal ve fırsatçı mikroorganizmalar üzerinde bakteriyostatik veya bakterisidal etkiler gösterip göstermediğini araştırmaktır. Bu ajanların tanısal görüntülemede yaygın olarak kullanılması göz önüne alındığında, mikroorganizma canlılığı üzerindeki olası etkilerini anlamak klinik açıdan önem taşımaktadır. Gereç ve Yöntem: Candida spp., Lactobacillus spp., Staphylococcus epidermidis, Enterococcus spp. ve Escherichia coli suşları standart laboratuvar koşullarında kültüre edildi. Her suş, beş farklı iyotlu kontrast ajana beş farklı seyreltme düzeyinde (1/1, 1/2, 1/4, 1/8 ve 1/16) maruz bırakıldı. Antimikrobiyal etkinlik, kimyasal ajanların mikroorganizma büyümesini inhibe etme etkilerini değerlendirmek için yaygın olarak kullanılan in vitro bir yöntem olan disk difüzyon yöntemi ile değerlendirildi. Tüm kültürler, mikroorganizmaların büyüme özelliklerine bağlı olarak 18–48 saat süreyle 37°C’de aerobik koşullarda inkübe edildi. Bulgular: Test edilen kontrast ajanlarının hiçbiri, herhangi bir mikroorganizma üzerinde herhangi bir seyreltme düzeyinde bakteriyostatik veya bakterisidal etki göstermedi. Tüm suşların büyüme paternleri, ajan türü ve konsantrasyonundan bağımsız olarak tutarlıydı ve mikroorganizma çoğalmasının engellenmediğini gösterdi. Sonuç: Kontrollü in vitro koşullarda, iyotlu kontrast ajanlar, seçilmiş bağırsak mikroorganizmaları üzerinde antimikrobiyal aktivite göstermedi. Bu bulgular, bu ajanların kısa vadede bağırsak mikrobiyal canlılığını doğrudan etkilemesinin olası olmadığını ve rutin tanısal işlemler sırasında normal bağırsak mikrobiyal popülasyonlarının korunması açısından güvenli olduklarını düşündürmektedir.

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Cite This Article

Başpinar, N., Çimen, D. B., Sümer, Z., Şalk, İ. (2025). In Vitro Evaluation of the Effects of Iodinated Contrast Agents on Gut Microbiota. Bozok Tıp Dergisi, Cilt: 15 Sayı: 4, 502–506. https://doi.org/10.16919/bozoktip.1800846

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