Hojabri Zoya, Ahangarzadeh Rezaee Mohammad, Nahaei Mohammad Reza, Soroush Mohammad Hossein, Ghojazadeh Morteza, Pirzadeh Tahereh, Davodi Mostafa, Ghazi Mona, Bigverdi Reza, Pajand Omid, Aghazadeh Mohammad
Tabriz Research Center of Infectious and Tropical Diseases, Tabriz University of Medical Sciences, Tabriz, Iran. ; Microbiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
Adv Pharm Bull. 2013;3(1):121-5. doi: 10.5681/apb.2013.020. Epub 2013 Feb 7.
The antimicrobial activity of doripenem in comparison of imipenem, meropenem and ertapenem among Pseudomonas aeruginosa isolated from burn and Cystic Fibrosis (CF) patients were determined.
Metallo-β-lactamase (MBL) genes in imipenem non susceptible P. aeruginosa isolates were detected using PCR method. The in vitro susceptibilities of doripenem, imipenem, meropenem and ertapenem were determined by Etests. MIC50 and MIC90 for corresponding antibiotics were determined individually in burn and CF isolates.
Among isolates which were resistant to imipenem, 16 isolates were positive for the bla IMP gene. All isolates had no bla VIM gene. All MBL producing isolates were excluded. MIC50/MIC90 of doripenem in CF and burn isolates were 0.75/>32 and >32/>32 mg/L respectively. The corresponding values for imipenem in CF and burn isolates were 2/>32 and >32/>32 mg/L, respectively.
The susceptibility rate of doripenem is higher than that of imipenem and meropenem among P.aeruginosa isolated from CF patients, whereas, there is no difference between the efficiency of doripenem and old carbapenems in non MBL producing P.aeruginosa isolates in burn patients.
测定多黏菌素B在从烧伤患者和囊性纤维化(CF)患者中分离出的铜绿假单胞菌中与亚胺培南、美罗培南和厄他培南相比的抗菌活性。
使用PCR方法检测亚胺培南不敏感的铜绿假单胞菌分离株中的金属β-内酰胺酶(MBL)基因。通过Etest测定多黏菌素B、亚胺培南、美罗培南和厄他培南的体外敏感性。分别在烧伤和CF分离株中单独测定相应抗生素的MIC50和MIC90。
在对亚胺培南耐药的分离株中,16株bla IMP基因呈阳性。所有分离株均无bla VIM基因。所有产MBL的分离株均被排除。多黏菌素B在CF和烧伤分离株中的MIC50/MIC90分别为0.75/>32和>32/>32 mg/L。亚胺培南在CF和烧伤分离株中的相应值分别为2/>32和>32/>32 mg/L。
在从CF患者中分离出的铜绿假单胞菌中,多黏菌素B的敏感率高于亚胺培南和美罗培南,而在烧伤患者中,在不产MBL的铜绿假单胞菌分离株中,多黏菌素B与旧碳青霉烯类药物的疗效无差异。