ABSTRACT
>We previously reported on a comparison of the AccuProbe(®) Gen-Probe(®) MTBC assay (AccuProbe) (BioMérieux, Marcy L'Etoile, France) with the Becton Dickinson (BD) MGIT™ TBc Identification (TBc) Test (BD, Franklin Lakes, NJ, USA) in our laboratory. In the period following the shift from the AccuProbe assay to the TBc test, we obtained six false-negative results. On sequencing the mpt64 gene, we found that these false-negative cases had mutations in the mpt64 gene due to deletion, insertion or substitution. Despite the occurrence of false-negative results, we found that the reduced cost and minimal technical expertise, combined with a new testing algorithm, still make this test the preferred option for rapidly identifying Mycobacterium tuberculosis complex in MGIT cultures in a low TB burden country such as New Zealand.
Subject(s)
Bacteriological Techniques/methods , Mycobacterium tuberculosis/genetics , Tuberculosis/microbiology , Adult , Aged , Aged, 80 and over , DNA Mutational Analysis , False Negative Reactions , Female , Genes, Bacterial , Humans , Male , Middle Aged , New Zealand , Sensitivity and Specificity , Young AdultABSTRACT
Corynebacterium aquaticum was the cause of peritonitis in a 33-year-old diabetic woman on continuous ambulatory peritoneal dialysis (CAPD). This case represents the first reported instance of CAPD peritonitis due to this organism. Moreover, the organism was recovered from fibrin clots removed from dialysate bags when the patient was on antibiotic therapy. Routine cultural methods failed to reveal the organism at that time. The organism is described and key points differentiating it from similar organisms are emphasised. The world literature on C. aquaticum infections is reviewed.
