Kharazmkia Ali, Amirizadeh Mehran, Goudarzi Zahra, Birjandi Mehdi, Barfipoursalar Alireza, Mir Samareh
Department of Clinical Pharmacy, School of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran.
Student Research Committee, School of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran.
Ann Med Surg (Lond). 2022 Apr 29;77:103690. doi: 10.1016/j.amsu.2022.103690. eCollection 2022 May.
Carbapenems are beta-lactam antibiotics that can play an important role in infections with multiple and severe resistance. The aim of this study was to investigate the frequency of carbapenem-producing bacteria in gram-negative isolates of clinical samples obtained from patients
291 g-negative bacilli were isolated from the samples of hospitalized patients using gram staining method, conventional methods and biochemical tests. The antibiotic susceptibility of the isolates was determined using the agar disk diffusion method for 5 different antibiotics. Strains that were resistant to Meropenem antibiotic, KPC enzyme production was examined by the Modified Hodge test method.
Out of 291 g-negative bacilli, 14 isolates showed resistance to Meropenem by a disk agar diffusion method where 12 (85.8%) strains were producing KPC enzyme The highest frequency of Gram-negative KPC-producing bacilli was related to and the most positive samples were urine. The prevalence of this type of bacteria was highest in NICU and the male internal ward, respectively.
It was shown that carbapenem-resistant strains are considered as a growing problem in hospitals, especially in the intensive care unit for children and men.
碳青霉烯类是β-内酰胺类抗生素,在多重耐药和严重耐药感染中可发挥重要作用。本研究的目的是调查从患者获得的临床样本革兰氏阴性分离株中产碳青霉烯类细菌的频率。
采用革兰氏染色法、常规方法和生化试验,从住院患者样本中分离出291株革兰氏阴性杆菌。采用琼脂纸片扩散法测定分离株对5种不同抗生素的药敏性。对美罗培南抗生素耐药的菌株,采用改良 Hodge 试验法检测KPC酶的产生。
在291株革兰氏阴性杆菌中,14株通过纸片琼脂扩散法显示对美罗培南耐药,其中12株(85.8%)菌株产生KPC酶。革兰氏阴性产KPC杆菌的最高频率与尿液相关,尿液样本阳性率最高。这类细菌的患病率在新生儿重症监护病房和男性内科病房分别最高。
结果表明,耐碳青霉烯类菌株在医院中是一个日益严重的问题,尤其是在儿童和男性重症监护病房。