Judith Westerling

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Beginning in 1993, an increase in clinical isolates of Mycobacterium abscessus was observed in a single hospital microbiology laboratory. This involved a cluster of four patients in June 1993 and five patients and a quality-control culture of distilled water in May 1994. Twenty-three M. abscessus isolates recovered between 1991 and 1996 were compared by(More)
Recovery of Mycobacterium avium complex organisms from 412 lysis-centrifugation (Isolator) concentrates of blood specimens obtained from human immunodeficiency virus-positive individuals was attempted with the following media (and Isolator concentrate inoculum volumes): BACTEC 12B broth (0.2 and 1.0 ml), Lowenstein-Jensen slants (0.1 ml), and Middlebrook(More)
The Mycobacterium Tuberculosis Direct (MTD) Test is widely used for detection of Mycobacterium tuberculosis complex (MTBC) in respiratory specimens. Based on high specificity, it is accepted that a positive MTD result, in proper clinical context, "rules in" a diagnosis of tuberculosis. Test utility for "ruling out" tuberculosis has been limited by lower(More)
The fluorescence excitation and the adsorption spectrum of 2,7,9-tricarboxy-1H-pyrrolo [2,3-f]quinoline-4,5-dione (pyrrolo-quinoline quinone, PQQ), measured in the pH range 7.0-10.0, are quite different. However, when the temperature of the solution is lowered, the shape and maxima of these spectra become more similar. 1H-NMR in 2H2O revealed a(More)
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