Evaluation of Meropenem and Gentamicin Synergy on Klebsiella pneumonaie

Yıl 2024, Cilt: 8 Sayı: 3, 236 - 241, 31.12.2024

Ali Ünal , Yeliz Tanrıverdi Çaycı , İlknur Bıyık

https://doi.org/10.34084/bshr.1590089

Öz

Objective: Antimicrobial resistance is a severe global problem, causing both medical and economic results. Klebsiella pneumoniae (K. pneumoniae) is a gram-negative bacterium that plays a major role in these burdens due to its widespread resistance mechanisms. This study searchs for the synergy and antagonism between meropenem and gentamicin using the disk diffusion method and compares these findings with results from the checkerboard method. If the results are consistent, validating the reliability of the disk diffusion method, it could be a cost-effective alternative to other testing methods.
Methods: The checkerboard method is used to assess the interaction of two antimicrobial agents (synergistic, indifferent, or antagonistic) by preparing a grid of wells containing varying concentrations of the agents. The fractional inhibitory concentration index (FICI) is calculated to evaluate the combination's efficacy.
In the disc diffusion method, the antimicrobial activity of an agent is determined by placing discs soaked in the agent on an agar plate inoculated with bacteria. After incubation, the diameter of the inhibition zone is measured to assess susceptibility.
Results: No synergy or antagonism was detected in any of the 30 Klebsiella pneumaniae isolates by either method.
Conclusion: The disc diffusion method is a cost-effective and reliable alternative to other in vitro synergy tests, especially when facilities are limited.

Anahtar Kelimeler

In Vitro Synergy, Meropenem, Gentamicin, Klebsiella Pneumoniae

Proje Numarası

1919B012216444

Meropenem ve Gentamisin Sinerjisinin Klebsiella pneumoniae Üzerinde Değerlendirilmesi

Öz

Amaç: Antimikrobiyal direnç, hem tıbbi hem de ekonomik sonuçlara neden olan ciddi bir küresel sorundur. Klebsiella pneumoniae (K. pneumoniae), yaygın direnç mekanizmaları nedeniyle bu yüklerde önemli rol oynayan gram-negatif bir bakteridir. Bu çalışma, disk difüzyon yöntemini kullanarak meropenem ve gentamisin arasındaki sinerji ve antagonizmi araştırmakta ve bu bulguları dama tahtası yönteminden elde edilen sonuçlarla karşılaştırmaktadır. Sonuçlar tutarlıysa, disk difüzyon yönteminin güvenilirliğini doğrulayarak, diğer test yöntemlerine uygun maliyetli bir alternatif olabilir.
Yöntem: Dama tahtası yöntemi, iki antimikrobiyal ajanın etkileşimini (sinerjik, kayıtsız veya antagonistik) değerlendirmek için, ajanların değişen konsantrasyonlarını içeren kuyucuklardan oluşan bir ızgara hazırlayarak kullanılır. Kombinasyonun etkinliğini değerlendirmek için fraksiyonel inhibitör konsantrasyon indeksi (FICI) hesaplanır.
Disk difüzyon yönteminde, bir ajanın antimikrobiyal aktivitesi, ajana batırılmış disklerin bakterilerle aşılanmış bir agar plakasına yerleştirilmesiyle belirlenir. İnkübasyondan sonra, duyarlılığı değerlendirmek için inhibisyon bölgesinin çapı ölçülür.
Bulgular: Her iki yöntemle de 30 Klebsiella pneumaniae izolatının hiçbirinde sinerji veya antagonizm tespit edilmemiştir.
Sonuç: Disk difüzyon yöntemi, özellikle imkanların kısıtlı olduğu durumlarda, diğer in vitro sinerji testlerine uygun maliyetli ve güvenilir bir alternatiftir.

Anahtar Kelimeler

Gentamisin, Meropenem, İn Vitro Sinerji, Klebsiella Pneumoniae

Proje Numarası

1919B012216444

Kaynakça

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