Daptomycin is a lipopeptide antibiotic with activity against several important gram-positive bacterial pathogens, including drug-resistant staphylococci and enterococci. Because the mechanism of action of daptomycin is calcium-dependent depolarization of the cell membrane, susceptibility testing requires medium supplemented with a physiological level of calcium. This study assessed two Food and...

OBJECTIVES To investigate if colonization with heterogeneous glycopeptide-intermediate Staphylococcus aureus (hGISA) is associated with hGISA bacteraemia. METHODS Isolates of methicillin-resistant S. aureus (MRSA) from blood cultures and from swabs to detect MRSA colonization were screened for reduced susceptibility to glycopeptides by an agar incorporation method. Isolates detected by this s...

Korgenski and Daly recommend charcoal horse blood agar (Regan-Lowe agar) for the detection of erythromycin resistance in Bordetella pertussis by agar dilution, Etest methodology, or agar diffusion. MICs for most isolates were #0.06 to 0.12 mg/ml by agar dilution and the Etest, while the MIC for the only resistant strain was 16 to 64 mg/ml (4). Charcoal agar may be suitable for discrimination be...

In vitro activities of 17 antibiotics against 53 clinical strains of Mycobacterium marinum, an atypical mycobacterium responsible for cutaneous infections, were determined using the reference agar dilution method. Rifampin and rifabutin were the most active drugs (MICs at which 90% of the isolates tested were inhibited [MIC(90)s], 0.5 and 0.6 microgram/ml, respectively). MICs of minocycline (MI...

We appreciate the interest of Nastro et al. in our recent article (1); their comments (2) offer an opportunity to discuss the work further. Our study was undertaken with a collection of Acinetobacter baumannii and Klebsiella pneumoniae clinical isolates for which colistin (Cst) MICs were elevated. It was observed that among the commercial methods for Cst susceptibility testing (ST), gradient di...

Abstract Objectives: We aimed to compare classical methods and chromogenic media detect carbapenem-resistant Enterobacteriaceae (CRE) colonization among hospitalized patients determine the risk factors causing infection in colonized patients. Methods: Between January August 2017, 100 over age of 18 who were Reanimation Intensive Care Unit Trauma Emergency a university hospital examined. From fi...

In the present study, Anacker and Ordal agar, marine agar (MA), and Flexibacter maritimus medium (FMM) were compared with the dilute versions of Mueller-Hinton agar (DMHA) medium recommended by the National Committee for Clinical Laboratory Standards (NCCLS) for their use in disk diffusion tests with Tenacibaculum maritimum strains and to calculate the MICs of five drugs by the Etest method. Pr...