Elif AYDIN, Gülnur TARHAN, Funda ŞAHİN, Sami EREN

Türkiye'nin Doğu Anadolu bölgesinden izole edilen M. tuberculosis izolatlarının inhouse PCR yöntemi ile moleküler epidemiyolojik tiplendirilmesi

Amaç: Örneklerin mikroskopi ve kültür sonuçlarının karşılaştırılması, izolatların ilaç direnç oranlarının belirlenmesi, suşlar arasındaki epidemiyolojik ilişkilerin ERIC-PCR, RAPD-PCR, OUT-PCR ile ev içi PCR tekniğine dayalı olarak değerlendirilmesi amaçlandı. Gereç ve Yöntem: 2010 numunenin direkt mikroskopi ve kültür sonuçları analiz edildi. İlaç duyarlılık sonuçları TULSA'dan elde edildi. İzolatların tiplendirilmesi, bir devlet üniversitesinin tıp fakültesinin mikrobiyoloji laboratuvarında, in house PCR yöntemi ile gerçekleştirilmiştir. Bulgular: Pozitif örneklerin %2.68'inde Aside dirençli basil (ARB) pozitif + kültür pozitifliği, yaymada %2.93'ünde ARB pozitif ve kültür negatif, yaymada %1.34'ünde ARB negatif ve kültür pozitifliği vardı. Kültür pozitif olan 33 izolatta primer antitüberküloz (anti-TB) ilaçlara direnç görülmezken, bir veya daha fazla primer anti-TB ilaca direnç %9.09'da gözlendi. Tek ilaç direnci %3.03, Isoniazid (INH) ve INH kritik ilaçlara direnç %6.06 idi. İzolatlar ERIC-PCR ile 3 gruba, OUT-PCR için 5 grup ve RAPD-PCR ile 6 gruba ayrıldı. Sonuç: Çalışılan numune oranının düşük olması, tedavi sürecinde alınan numunelerin negatif olması nedeniyle pozitiflik oranları düşüktü. ERIC-PCR, RAPD-PCR ve OUT-PCR gibi moleküler teknikler, kökenler arasındaki farklılıkları, benzerlikleri değerlendirmede Mycobacterium tuberculosis'in (MTB) epidemiyolojik tiplendirilmesi için kolay, hızlı ve ucuz yöntemlerdir.

Anahtar Kelimeler:

Mycobacterium tuberculosis, EZN, ERIC-PCR, RAPD-PCR, OUT-PCR

Molecular epidemiological typing of M. tuberculosis isolates isolated from Turkey's Eastern Anatolia with in house PCR method

Purpose: The aim of this study as to compare microscopy and culture results of samples, determine drug resistance rates of the isolates, evaluate epidemiological relationship between the strains with ERIC-PCR, RAPD-PCR, OUT-PCR based on in house PCR technique. Materials and Methods: Direct microscopy and culture results of 2010 samples were analyzed. Drug sensitivity results were obtained from TULSA. The typing of isolates based on in house PCR was carried out in the microbiology laboratory of a faculty of medicine in a state university. Results: Of positive samples, 2.68% had Acid-resistant bacilli (ARB) positive + culture positivity, 2.93% had ARB positive and culture negative in smear, and 1.34% had ARB negative and culture positivity in smear. Resistance to primary antituberculous (anti-TB) drugs wasn’t observed in 33 culture positive isolates, whereas resistance to one or more primary anti-TB drugs was observed in 9.09%. Single drug resistance was 3.03%, resistance to Isoniazid (INH) and INH critical drugs was 6.06%. Isolates were divided 3 groups by ERIC-PCR, 5 groups for OUT-PCR and 6 by RAPD-PCR. Conclusion: Positivity rates were low due to low rate of studied samples, negative samples taken during treatment process. Molecular techniques like ERIC-PCR, RAPD-PCR and OUT-PCR are easy, fast and inexpensive methods for the epidemiological typing of Mycobacterium tuberculosis (MTB) in evaluating distinctions, similarities between origins.

Keywords:

Mycobacterium tuberculosis, EZN, ERIC-PCR, RAPD-PCR, OUT-PCR,

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