Yeni bir antibakteriyel ajan: DAPTOMİSİN

Dünya çapında artan antibiyotik direnci nedeniyle gram pozitif bakteri infeksiyonları, özellikle de Metisilin Dirençli S.aureus (MRSA), için yeni tedavi seçeneklerine ihtiyaç duyulmaktadır. Daptomisin ise geniş gram pozitif patojen etkinliğine sahip olan siklik lipopeptit sınıfı bir antimikrobiyaldir. Komplike deri ve yumuşak doku infeksiyonları, Staphylococcus aureus’un etken olduğu bakteriyemi ve sağ kalp infektif endokarditi için onay almıştır. Hızlı bakterisidal etkinliğinin yanında günde tek doz 4-6mg/kg infüzyon şeklinde uygulanmaktadır. Daptomisin ile kullanımda olan diğer geniş gram pozitif etkinliğe sahip olan 3 antibiyotiğin (vankomisin, linezolid, quinupristin-dalfopristin) Minimum İnhibitör Konsantrasyonları (MİK) karşılaştırılmış, MİK50 ve MİK90 değerleri daptomisin, vankomisin, linezolid ve quinupristin-dalfopristin için sırasıyla; 0.125mg/L-0.25mg/L, 1mg/L- 1.5mg/L, 0.5mg/L-0.75mg/L ve 0.5mg/L-0.75mg/L olarak hesaplanmıştır. Diğer antibakteriyellere göre en düşük MIC değerine sahip olan daptomisin dirençli gram pozitif patojenlerin neden olduğu infeksiyonların tedavisinde bir terapötik seçenek olarak karşımıza çıkmaktadır.

A novel antibacterial agent: DAPTOMYCİN

Novel antimicrobial agents are necessary for the treatment of infections caused by gram positive pathogens, especially by Meticillin resistant Staphylococcus aureus (MRSA), because of the increasing worldwide resistance. Daptomycin; which has activity against a wide spectrum of gram positive organisms, is a novel cyclic lipopeptide antimicrobial. It is indicated for the treatment of complicated skin and soft tissue infections, bacteremia and right side infective endocarditis caused by S. aureus. Beside once daily 4-6 mg/kg infusion dosing regimen it has a rapid bactericidal activity. MICs of daptomycin was compared with those of three antimicrobial agents (vancomycin, linezolid, quinupristin-dalfopristin) which has a activity against gram positive bacteriae. MIC50 and MIC90 values of daptomycin, vancomycin, linezolid and quinupristin-dalfopristin were determined as 0.125mg/L-0.25mg/L, 1mg/L-1.5mg/L, 0.5mg/L-0.75mg/L and 0.5mg/L-0.75mg/L, respectively. With having the lowest MIC values, daptomycin may represent a therapeutic option for the infections caused by gram positive pathogens.

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