BackgroundKlebsiella pneumoniae (K. pneumoniae) is a common cause of health-care associated infections (HAIs) and has high levels of antibiotic resistance. These bacteria are well-known for their ability to produce biofilm. The purpose of this study was to identify the antibiotic resistance pattern and biofilm-producing capacity of K. pneumoniae isolated from clinical samples in a tertiary care hospital in Klaten, Indonesia.MethodsK. pneumoniae was isolated from inpatients in Soeradji Tirtonegoro Hospital Klaten from June 2017 to May 2018. Identification of K. pneumoniae isolate was done by analyzing colony morphology, microscopic examination, and by performing biochemical testing. Testing of antibiotics susceptibility and biofilm-producing capacity used the Kirby-Bauer disk diffusion method and adherence quantitative assays, respectively.ResultsA total of 167 (17.36%) K. pneumoniae isolates were isolated from 962 total clinical bacterial isolates during the study. Most of them were collected from patients aged more than 60 years old and were mainly obtained from respiratory specimens (51.50%). Most of K. pneumoniae isolates were extensively resistant to antibiotics. A more favorable profile was found only towards meropenem, amikacin, and piperacillin-tazobactam, showing 1.20%; 4.79% and 10.53% of resistance, respectively. The overall proportion of multidrug-resistant K. pneumoniae isolates was 54.49%. In addition, 148 (85.63%) isolates were biofilm producers, with 45 (26.95%) isolates as strong, 48 (28.74%) isolates as moderate, and 50 (29.94%) isolates as weak biofilm producers.ConclusionMost of the K. pneumoniae isolates demonstrated resistance to a wide range of antibiotics and are biofilm producers.

Globally, the prevalence of Klebsiella pneumoniae (K. pneumonia) producing extended spectrum beta lactamase (ESBL) has been increasing steadily. The susceptibility patterns of ESBL-producing K. pneumonia varies considerably among countries. Therefore, the investigation of ESBL-producing K. pneumoniae in clinical isolates and their susceptibility are warranted. This research aimed to determine the proportion of ESBL-producing K. pneumoniae and the antibiotic susceptibility patterns of clinical isolates from Dr. Soeradji Tirtonegoro General Hospital, Klaten, Central Java. Identification of K. pneumoniae was performed by analyzing colony morphology, microscopic examination, and biochemical testing using Microbact. Both antibiotic susceptibility testing and ESBL screening (using ceftazidime, cefotaxime, and ceftriaxone discs) were conducted using disc diffusion method according to CLSI. The positive results were confirmed with modified double disk synergy (MDDST) using amoxicillin-clavulanate, ceftazidime, cefotaxime, and cefepime discs. From 962 clinical bacterial isolates, 168 (17.46%) isolates were identified as K. pneumoniae, during June 2017-May 2018. K. pneumoniae was mainly isolated from the Intensive Care Units (ICU) (29.17%) and with sputum being the most common specimen (45.24%). Overall ESBL producers were 52.98%, with the majority from ICU (41.57%) and isolated from sputum specimens (40.45%). ESBL-producing K. pneumoniae showed high resistance to many antibiotics. The sensitivity of ESBL-producing K. pneumoniae isolated from respiratory tract samples against piperacillin-tazobactam, amikacin, and meropenem was more than 80%. In conclusion, among all K. pneumoniae isolates, ESBL K. pneumoniae was 52.98%. ESBL K. pneumoniae from respiratory tract specimens had a sensitivity of more than 80% against piperacillin-tazobactam, amikacin, and meropenem. K. pneumoniae, selama Juni 2017-Mei 2018. K. pneumoniae terutama diisolasi dari intensive care unit (ICU) (29,17%) dan dengan dahak sebagai spesimen umum (45,24%). Secara keseluruhan produsen ESBL adalah 52,98%, dengan mayoritas dari ICU (41,57%) dan diisolasi dari spesimen dahak (40,45%). K. pneumonia yang memproduksi ESBL menunjukkan resistensi tinggi terhadap banyak antibiotik. K. pneumoniae penghasil ESBL yang diisolasi dari sampel saluran pernapasan menunjukkan sensitivitas terhadap piperasilintazobactam, amikasin, dan meropenem lebih dari 80%. Dapat disimpulkan di antara semua isolat K. pneumoniae, ESBL K. pneumoniae adalah 52,98%. ESBL K. pneumoniae dari spesimen saluran pernapasan memiliki sensitivitas lebih dari 80% terhadap piperasilin-tazobaktam, amikasin, dan meropenem.