OBJECTIVE To determine the prevalence of extended spectrum b-lactamase at King Khalid University Hospital, Riyadh, Kingdom of Saudi Arabia and to compare the ability of the disc diffusion, double disc potentiation methods and the extended-spectrum b-lactamase E test to detect exended-spectrum b-lactamase among enterobacteriaceae. METHODS This study was undertaken during the time period period...

In a four-year period (July/2001-June/2005), 410 Haemophilus spp. isolates were studied. Those were isolated from sputum at Hospital Nossa Senhora da Conceição (NSC) in Porto Alegre city (RS). beta-lactamase enzyme was detected in 113 (27.6%) of isolates through chromogenic cephalosporin method. Fifty-eight (51.3%) of them showed sensibility to ampicillin through disc-diffusion method using Hae...

Antimicrobial susceptibility testing by the disc diffusion method is discussed with emphasis on the need for standardization of methodology. The KirbyBauer method is currently widely used by clinical laboratories and best incor­ porates many of the features recommended by the World Health Organization. It is relatively simple from a technicological standpoint and accurate and reproducible so lo...

Antibiotic resistance of Intensive Care Unit (ICU) born aerobic gram-negative bacteria was evaluated during a six months period at a teaching hospital in Tehran, and determination of the validity of the results obtained from disc diffusion tests, using discs manufactured in Iran. Disc susceptibility tests using Iranian and standard discs (diffusion discs available in international markets) were...

conclusions the results indicate that multidrug-resistant (mdr) strains of salmonella are increasing in number, and fewer antibiotics may be useful for treating s. enterica infections. routine investigation and reporting of antibiotic mics in patients presenting with salmonella infections is suggested. results of the total 19 salmonella spp. isolates recovered by the bactec automated system, al...

BACKGROUND AND OBJECTIVES Methicillin-resistant Staphylococcus aureus (MRSA) is a well-known pathogen with a worldwide distribution. Given the increasing rate of MRSA infections, implementing of reliable, accurate and rapid testing for diagnosis of MRSA is necessary. The aim of this study was to compare four diagnostic methods for detection of MRSA isolates. MATERIALS AND METHODS From Decembe...

Antibiotic sensitivities for Linezolid of 20 strains that reported as Brucella melitensis in blood cultures between 2014 and 2016 were evaluated by disc diffusion and E-test methods. According to the disc diffusion method results, 20 Brucella melitensis strains had ≥ 25 mm of antibiotic sensitivity zones. Etest measurements revealed that MIC values were between 1.5 and 6 μg. Linezolid can be an...