1887

Abstract

The aim of this study was to biotype and characterize phospholipase, proteinase and haemolytic activities of oral isolates from 210 Chinese patients with type 2 diabetes mellitus (DM) and 210 age- and sex-matched healthy controls. Seventy-six and 50 isolates were obtained from type 2 DM patients and controls, respectively, using the oral rinse technique. The isolates were characterized with a biotyping system based on enzyme profiles, carbohydrate assimilation patterns and boric acid resistance of the yeasts, and the isolates were further tested for phospholipase, proteinase and haemolytic activities. The major biotypes of isolates from the type 2 DM and control groups were A1R (42.1 %) and J1R (36.0 %), respectively. Significantly higher proteinase and haemolytic activities were found in the isolates from the type 2 DM group (<0.05). Proteinase activity was higher in isolates from patients with ≥10 years of DM history than those with <10 years (<0.05). Haemolytic activity was significantly higher in isolates from female DM patients than in those from male counterparts (<0.05). These data provide evidence of increased extracellular enzyme activity in isolates taken from DM patients.

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2007-10-01
2019-10-15
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