Abstract:
Various embodiments disclosed herein provide for reagents and methods for rapidly isolating viable microbial cells, including S. pneumoniae, from positive blood culture samples. The resulting microbial pellet can be used for both identification and growth-based methods such as antimicrobial susceptibility testing. The buffers described herein may contain a base solution, non-ionic detergents, thiols, and optionally, ammonium chloride. The disclosed methods provide a process for rapidly isolating and concentrating viable microorganism (s) from PBC samples using only one sample preparation tube and centrifugation while removing cellular debris from the mammalian blood cells that may interfere with identification methods.
Abstract:
An automated system for identifying in a biological sample microorganisms and their antimicrobial susceptibility (AST). The system provided an automated platform for preparing, from a single biological sample, inoculates for both ID and AST. The system loads a plate for ID testing as samples are being prepared for AST testing. The system tracks the sample and the inoculates from the samples to link the test results to the sample and the patients from whom the sample was obtained.
Abstract:
An automated system for identifying in a biological sample microorganisms and their antimicrobial susceptibility (AST). The system provided an automated platform for preparing, from a single biological sample, inoculates for both ID and AST. The system loads a plate for ID testing as samples are being prepared for AST testing. The system tracks the sample and the inoculates from the samples to link the test results to the sample and the patients from whom the sample was obtained.
Abstract:
Various embodiments disclosed herein provide for reagents and methods for rapidly isolating viable microbial cells, including S. pneumoniae, from positive blood culture samples. The resulting microbial pellet can be used for both identification and growth-based methods such as antimicrobial susceptibility testing. The buffers described herein may contain a base solution, non-ionic detergents, thiols, and optionally, ammonium chloride. The disclosed methods provide a process for rapidly isolating and concentrating viable microorganism (s) from PBC samples using only one sample preparation tube and centrifugation while removing cellular debris from the mammalian blood cells that may interfere with identification methods.
Abstract:
Methods of the invention include the isolation of intact, viable microorganism(s) from positive blood culture (“PBC”) samples for use in downstream analyses such as identification and antimicrobial susceptibility testing (“AST”). The methods involve collecting a portion of the PBC sample, adding a choline-containing solution, lysing the blood cells, isolating the viable microorganism, and performing downstream analysis of the isolated, viable microorganism. The methods can be applied to a variety of gram-positive bacteria, gram-negative bacteria, and/or yeast, and particularly to strains of S. pneumoniae.