Abstract:
The present invention relates to methods and systems for scanning, detecting, and monitoring microorganisms on solid or semi-solid media using intrinsic fluorescence (IF) measurements. The methods are further directed to detection, characterization and/or identification of microorganisms on a solid or semi-solid media using intrinsic fluorescence (IF) measurements that are characteristic of said microorganisms.
Abstract:
The present invention is directed to a method for inactivation and/or extraction of acid-fast bacteria (e.g., mycobacteria or nocardia), the method comprising the following sequential steps: (a) acquiring a test sample known to contain or that may contain acid-fast bacteria and suspending the test sample in a container containing ethanol and beads; (b) bead beating and/or vortexing the container to break up clumps and/or disrupt acid-fast bacteria cells in the container; and (c) subsequently incubating the suspension for at least about 3 minutes at room temperature to inactivate any acid-fast bacteria contained in the test sample. In accordance with the present invention, the test sample can subsequently be pelleted by centrifugation, resuspended with formic acid, acetonitrile added, and subjected to mass spectrometry for characterization and/or identification of the acid-fast bacteria.
Abstract:
The present invention provides for methods for detecting bacterial pathogens in a sample. A preferred method includes the steps of: suspending a sample comprising a medium and microorganisms, the microorganisms suspected of comprising bacterial pathogens; mixing the sample, an adsorbent and a first solution in a vessel; separating the adsorbent and the microorganisms from the medium and the bulk of the first solution and removing the medium and the bulk of the first solution from the vessel; adding a second solution to the vessel to resuspend the adsorbent and the microorganisms; and detecting agglutination of the adsorbent wherein the agglutination of the adsorbent signifies bacterial pathogens are present in the sample.
Abstract:
An apparatus in which scattered light is measured, said apparatus having a light source aligned to direct illumination toward an interface between a sample container and an aqueous solution at an angle less than the critical angle. A detector to measure the scattered light is located at a place outside the envelope of the critical angle.
Abstract:
This holder and transporter is for one or more tanks of the type containing oxygen and acetylene gases. Basically, it comprises a base, a handle and means connecting them, the latter serving to receive and secure at least one tank to the assembly. More specifically, the base is of channel shape to provide rigidity, the tank receiving means being a split band to encircle the tank and provide separated ends which are perforated to receive a fastener used in clamping the band to the tank, one of the ends having a handle formed thereon. The handle is offset relative to the band to provide a selected balance between the handle and the tank. If desired, the base may be shaped to give increased strength to light-weight material and provide spaced supporting surface engaging portions which make the holder stable on uneven surfaces. The holder may be adapted for use on a plurality of tanks.
Abstract:
The switching system of this invention includes a plurality of coordinate contact sets arranged in rows and columns, actuating means corresponding to each column for selectively actuating a contact selector bar corresponding to each row when the contact selector bar has been operated to transmit contact closing and opening forces thereto, and a contact operator at each coordinate operable by the selector bar to effect movement and an automatic latching of a selected contact set.
Abstract:
The present invention provides a method and system for monitoring, detecting, and/or characterizing a biological particle that may be present in a sample. The method may be accomplished in a sealed container by utilizing a first step time-dependent spectroscopic technique to obtain at least two measurements of a growth composition comprising a sample and correlating said measurements for the detection and/or characterization of a biological particle that may be present in the sample. The method further provides for a subsequent step for the separation, characterizion and/or identification of the microorganisms in the sealed container.
Abstract:
The present invention is directed to a method for separating, characterizing and/or identifying microorganisms in a test sample. The method of the invention comprises an optional lysis step for lysing non-microorganism cells that may be present in a test sample, followed by a subsequent separation step. The method may be useful for the separation, characterization and/or identification of microorganisms from complex samples such as blood-containing culture media. The invention further provides methods for separating, characterizing and/or identifying microorganisms in situ within a single system.
Abstract:
The present invention is directed to a method for separating, characterizing and/or identifying microorganisms in a test sample. The method of the invention comprises an optional lysis step for lysing non-microorganism cells that may be present in a test sample, followed by a subsequent separation step. The method may be useful for the separation, characterization and/or identification of microorganisms from complex samples such as blood-containing culture media. The invention further provides for spectroscopic interrogation of the separated microorganism sample to produce measurements of the microorganism and characterizing and/or identifying the microorganism in the sample using said spectroscopic measurements.
Abstract:
The present invention is directed to a method for separating, characterizing and/or identifying microorganisms in a test sample. The method of the invention comprises an optional lysis step for lysing non-microorganism cells that may be present in a test sample, followed by a subsequent separation step. The method may be useful for the separation, characterization and/or identification of microorganisms from complex samples such as blood-containing culture media. The invention further provides methods for separating, characterizing and/or identifying microorganisms in situ within a single system.