Detection of Extended-spectrum Beta-lactamases in AMPC Co-producing Bacteria by Disc Diffusion Method in Clinical Isolates of Enterobacteriacae

2016 ◽  
Vol 7 (2) ◽  
pp. 236 ◽  
Author(s):  
D Anusuya Devi ◽  
Rajesh Ramachander
Keyword(s):  
Clinical Isolates ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases

scholarly journals Extended Spectrum Beta-Lactamases Producers among Gram-negative Bacteria from Clinical and Environmental Sources in Two Tertiary Hospitals in Makurdi, Nigeria

2020 ◽  
pp. 42-53
Author(s):  
Florence Bose Omoregbe ◽  
Obasola Ezekiel Fagade
Keyword(s):  
Clinical Isolates ◽  
Diffusion Method ◽  
Clinical Samples ◽  
Multiple Drug ◽  
Gram Negative Bacteria ◽  
Disc Diffusion ◽  
Gram Negative ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases

Extended Spectrum Beta-Lactamases (ESBLs) enzymes are produced by many Gram-negative bacteria to nearly all antibiotics. Clinical bacteria isolates were obtained from various clinical samples from the two healthcare facilities. Sewer wastewater and sediments were also collected from both hospitals using standard sampling techniques and bacteria isolated using pour plate technique. Multiple drug resistant patterns were determined using disc diffusion technique. Antibiotics sensitivity of the isolates was verified using disc diffusion method. Detection of ESBL producing bacteria was done using double disc synergy test. Data obtained were analysed using descriptive statistics. Clinical bacteria (403) were obtained, out of which 299 were confirmed Gram-negative, 218 from Federal Medical Centre (FMC) and 81 from Benue State Teaching Hospital (BSUTH). Thirty-nine Gram-negative bacteria were also isolated from the environmental samples. The ESBL producers in clinical isolates were 69 (FMC) and 42 (BSUTH) while in environmental isolates they were eight and four respectively. Out of a total of 338 environmental and clinical isolates from the two hospitals, 216 shown resistance/intermediate resistance to Ceftazidime. Of these 216, 123(36.39%) were positive for ESBLs production.- space From FMC, ESBLs producing bacteria are highly sensitive to imipenem with sensitivity frequency of 62 while they were highly resistant to ceftazidime with a frequency of 52. Age groups 0-5 had the highest percentage distribution of 21.43% and 10.14% from BSUTH and FMC respectively. ESBLs producing bacteria showed multidrug resistance.

scholarly journals ERROR RATE OF DISC DIFFUSION METHOD IN CEFTAZIDIME/ CEFOTAXIME SUSCEPTIBILITY TEST ON CLINICAL ISOLATES OF KLEBSIELLA PNEUMONIAE (Laju Kesalahan Uji Kepekaan Ceftazidim/Cefotaxime Metode Difusi Cakram pada Klebsiella pneumoniae)

2018 ◽  
Vol 22 (3) ◽  
pp. 208
Author(s):  
Luz Maria GBW ◽  
Osman Sianipar ◽  
Usi Sukorini
Keyword(s):  
Klebsiella Pneumoniae ◽  
Error Rate ◽  
Susceptibility Test ◽  
Clinical Isolates ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Major Error ◽  
Disc Diffusion Method ◽  
Minor Error ◽  
Extended Spectrum

Klebsiella pneumoniae merupakan salah satu bakteri Gram negatif yang banyak menimbulkan infeksi nosokomial. Difusi cakrammerupakan satu metode uji kepekaan antimikrobia yang banyak digunakan di laboratorium klinik yang juga dapat dipakai untuk menyaringK.pneumoniae penghasil enzim Extended-Spectrum β-Lactamase (ESBL). Antimikrobia pilihan untuk infeksi ini adalah cephalosporin generasiketiga (ceftazidime dan ceftotaxime). Penelitian ini bertujuan untuk mengetahui laju kesalahan uji kepekaan ceftazidime/cefotaxime metodedifusi cakram di isolat klinis K.peumoniae. Penelitian ini merupakan kajian potong lintang yang melibatkan 53 isolat klinis K.pneumoniae.Uji kepekaan ceftazidime/cefotaxime di isolat klinis K.pneumonia dilakukan menggunakan metode difusi cakram dan uji E sebagai rujukan.Hasil memeriksa dilaporkan dalam bentuk kepekaan, intermediate dan resistensi untuk setiap obat, dianalis untuk mengetahui laju kesalahan(minor error, major error dan very major error). Isolat klinis terbanyak berasal dari darah, air kemih dan nanah, berturut-turut 32,1%, 32,1%dan 18,9%. Sebagian besar isolat didapat dari ruang perawatan non-intensif (86,8%). Minor error uji kepekaan ceftazidime/cefotaximemetode difusi cakram berturut-turut 7,55% dan 1,89%, sehingga dapat disimpulkan bahwa metode difusi cakram uji kepekaan ceftazidime/cefotaxime dapat digunakan dalam uji kepekaan terhadap isolat klinik K.pneumoniae.

Categorization of temocillin susceptibility using the disc diffusion method: Susceptible, Intermediate, Resistant or Undetermined?

2020 ◽  
Author(s):  
Amandine HENRY ◽  
Anthony Michaud ◽  
Nicolas Degand ◽  
Emmanuelle Bille ◽  
Damien Fournier ◽  
...  
Keyword(s):  
Susceptibility Testing ◽  
Inhibition Zone ◽  
Generation Cephalosporin ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Disc Diffusion Method ◽  
Beta Lactamases ◽  
Inhibition Zone Diameter ◽  
Zone Diameter ◽  
Extended Spectrum Beta Lactamases

Abstract Background: Since the pandemic of ESBL (extended-spectrum beta-lactamases) and the emergence of carbapenemase-producing Enterobacterales there is a renewed interest in temocillin. However, as the molecule was little used, except in Belgium and UK, there are few guidelines for its antibiotic susceptibility testing (AST). We aim to assess the accuracy of the disc diffusion method (DDM) for temocillin susceptibility testing. Methods: Eight hundred eighty-eight Enterobacterales clinical strains of which 61.7% were resistant to 3 rd generation cephalosporin (3GC-R) were included. AST was performed using DDM in comparison to gradient strip tests (GST) and interpreted using the diameter breakpoint of 20mm and MIC breakpoint of 8 mg/L for DDM and GST as recommended by EUCAST-CASFM recommandations. Results: At breakpoint of 8mg/L, temocillin rates of susceptibility were 76.9%, 95.6% and 67.7% for overall, 3GC-S and 3GC-R strains respectively. Ninety-four (10.6%) discrepancies were noticed including 68 (72.3%) major errors and 26 (27.6%) very major errors. Sixty-eight (72.3%) of all errors correspond to inhibition diameters comprised between 17 and 23 mm. The presence of colonies within the inhibition diameter was noticed for 32 (5.3%) strains susceptible to temocillin. Conclusions: DDM lacks accuracy for strains displaying borderline inhibition zone diameter. We suggest applying the concept of area of technical uncertainty (ATU) for standard DDM. The strains displaying a diameter within the ATU should be tested by another method. The significance of colonies within the inhibition zone diameter should be explored.

First Detection of OXA-10 Extended-Spectrum Beta-Lactamases and the Occurrence of mexR and nfxB in Clinical Isolates of Pseudomonas aeruginosa from Nigeria

Chemotherapy ◽  
2015 ◽  
Vol 61 (2) ◽  
pp. 87-92 ◽  
Author(s):  
Bamidele T. Odumosu ◽  
Bola A. Adeniyi ◽  
Ram Chandra
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Efflux Pump ◽  
Clinical Isolates ◽  
Beta Lactamases ◽  
First Report ◽  
Extended Spectrum ◽  
Pcr Rflp ◽  
Extended Spectrum Beta Lactamases ◽  
Regulator Genes

Background: The characterization of β-lactamase production in Pseudomonasaeruginosa is rarely reported in Nigeria. The objective of this study was to investigate the occurrence and characterize the different β-lactamases as well as mechanisms of fluoroquinolones resistance among P. aeruginosa isolated from various clinical sources from Nigeria. Materials and Method: Isolates were investigated using PCR, RFLP and sequencing for the detection of various β-lactamases and efflux pump regulator genes. Result: The prevalence of OXA-10, AmpC, CTX-M and SHV in P. aeruginosa was 80, 70, 5 and 5%, respectively. The coexistence of blaOXA-10 with blaAmpC, blaSHV and blaCTX-M was reported in 40, 5 and 5% of isolates, respectively. The efflux pump regulator genes mexR and nfxB were both amplified in 45% of the OXA-10-positive isolates. Conclusion: This is the first report of the characterization of OXA-10 extended-spectrum β-lactamases and occurrence of mexR and nfxB efflux regulator genes in clinical isolates of P. aeruginosa in Nigeria.

scholarly journals Aminoglycoside-modifying enzymes in clinical isolates harboring extended-spectrum beta-lactamases.

1992 ◽  
Vol 36 (11) ◽  
pp. 2536-2538 ◽  
Author(s):  
A Fernandez-Rodriguez ◽  
R Canton ◽  
J C Perez-Diaz ◽  
J Martinez-Beltran ◽  
J J Picazo ◽  
...  
Keyword(s):  
Clinical Isolates ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases
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