Journals / Uludağ Üniversitesi Tıp Fakültesi Dergisi / 2022 / Cilt: 48 - Sayı: 3

Investigation of Carbapenemase Resistance Genes in Healthcare-Associated Infectious Enterobacterales Strains

Sağlık Hizmetiyle İlişkili Enfeksiyon Etkeni Enterobacterales Suşlarında Karbapenemaz Direnç Genlerinin Araştırılması

Pages
287–292
Publication Date
2022-12-30
DOI
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AI Summary & Key Takeaways

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

Since our study is the first planned study with carbapenem resistant isolates produced from consecutive samples sent to our laboratory, our data are epidemiologically important for our hospital and region.

📌 3 Key Takeaways

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Objective & Hypothesis:In our study, it was aimed to investigate the presence of carbapenemases by phenotypic and genotypic methods in Enterobacterales strains that were found to be resistant to meropenem or susceptible to dose-related in our hospital.
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Key Findings & Data:In our study, 79 Enterobacterales isolates, which were determined to be resistant to meropenem or susceptible to dose-related, by the automated system between December 2019 and December 2020, were examined by the BD Phoenix CPO detection panel, mCIM and conventional PCR methods.
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Conclusion & Impact:Since our study is the first planned study with carbapenem resistant isolates produced from consecutive samples sent to our laboratory, our data are epidemiologically important for our hospital and region.
🔬Design:Research Article
📍Scope:2019 Verileri
⚙️Variables:Sağlık hizmetiyle ilişkili enfeksiyonlar · Enterobacterales · karbapenemaz

Abstract

In our study, it was aimed to investigate the presence of carbapenemases by phenotypic and genotypic methods in Enterobacterales strains that were found to be resistant to meropenem or susceptible to dose-related in our hospital. Carbapenemases hydrolyze most β-lactams, including carbapenems. Many phenotypic and genotypic methods are used to determine the strains producing these enzymes. PCR, which is one of the genotypic methods, is the gold standard method, although it is time consuming and expensive. Due to the increasing resistance in Gram-negative bacteria, the determination of the profile of carbapenem resistance genes is important in terms of being a guide in determining antibiotic use policies. In our study, 79 Enterobacterales isolates, which were determined to be resistant to meropenem or susceptible to dose-related, by the automated system between December 2019 and December 2020, were examined by the BD Phoenix CPO detection panel, mCIM and conventional PCR methods. Fourty-two isolates of blaOXA-48 genes by conventional PCR; 16 isolates of blaNDM gene and 7 isolates of blaOXA-48 and blaNDM gene region were positive. blaIMP, blaVIM and blaKPC genes were not positive in any of the isolates. Of the 65 isolates that were positive by PCR, two were found to be negative by the BD Phoenix CPO detection panel. With the mCIM test, 64 of them were positive and only one was indeterminate. Since our study is the first planned study with carbapenem resistant isolates produced from consecutive samples sent to our laboratory, our data are epidemiologically important for our hospital and region.

Özet

Çalışmamızda, hastanemizde otomatize sistem ile meropeneme dirençli veya doza bağlı duyarlı saptanan Enterobacterales suşlarında fenotipik ve genotipik yöntemlerle karbapenemazların varlığının araştırılması amaçlandı. Karbapenemazlar, karbapenemler dahil olmak üzere çoğu β-laktamı hidrolize ederler. Bu enz􀵴mler􀵴 üreten suşların saptanmasında b􀵴rçok fenot􀵴p􀵴k ve genot􀵴p􀵴k yöntemler kullanılmaktadır. Genotipik yöntemlerden polimeraz zincir reaksiyonu zaman alıcı ve pahalı olmasına rağmen altın standart yöntemdir. Gram negatif bakterilerde artan direnç nedeniyle karbapenem direnç genlerinin profilinin belirlenmesi antibiyotik kullanım politikalarının belirlenmesinde yol gösterici olması açısından önem taşımaktadır. Çalışmamızda, Aralık 2019- Aralık 2020 tarihleri arasında bir yıllık süreçte otomatize sistem ile meropeneme dirençli veya doza bağlı duyarlı saptanan 79 Enterobacterales izolatı BD Phoenix CPO Detect paneli, karbapenem inaktivasyon yöntemi ve konvansiyonel PCR yöntemleri ile incelendi. Konvansiyonel PCR ile 42 izolat blaOXA-48 geni; 16 izolat blaNDM geni ve 7 izolat ise blaOXA-48 ile beraber blaNDM gen bölgesi pozitif olarak saptandı. İzolatların hiçbirinde blaIMP, blaVIM ve blaKPC genlerinde pozitiflik bulunmadı. PCR ile pozitif saptanan toplam 65 izolatın iki tanesi BD Phoenix CPO detect paneli ile negatif saptandı. mCIM testi ile ise 64 tanesi pozitif, yalnızca bir tanesi belirsiz olarak bulundu. Çalışmamız laboratuvarımıza gönderilmiş ardışık örneklerden üretilmiş karbapenem dirençli izolatlar ile planlanan ilk çalışma olduğu için verilerimiz hastanemiz ve bölgemiz açısından epidemiyolojik olarak önem taşımaktadır.

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Cite This Article

DEMİRBAKAN, H., KOÇER, İ. (2022). Investigation of Carbapenemase Resistance Genes in Healthcare-Associated Infectious Enterobacterales Strains. Uludağ Üniversitesi Tıp Fakültesi Dergisi, Cilt: 48 - Sayı: 3, 287–292. https://ajindex.com/articles/874815

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