Epidemiological typing of Acinetobacter strains by esterase electrophoresis.
Fifty-three strains of Acinetobacter, belonging to the species A baumannii, A. haemolyticus and A. johnsonii, were differentiated by electrophoretic typing of their esterases, on the basis of both the enzyme specific activity profiles and their electrophoretic mobilities. Each esterase was defined by its spectrum of hydrolytic activity toward five synthetic substrates and its sensitivity to di-isopropyl fluorophosphate. Since each enzyme was not detected in all strains of a given species, several zymotypes could be defined by the patterns of combinations of esterases. Thus, 24 zymotypes were defined in the 32 A. baumannii strains, 4 were defined in the 10 A. haemolyticus strains and 6 were defined in the 11 A. johnsonii strains. When the electrophoretic mobilities of the various esterases were included, each of the 53 strains of Acinetobacter (with the exception of three A. haemolyticus strains) showed a distinct electrotype.[1]References
- Epidemiological typing of Acinetobacter strains by esterase electrophoresis. Picard, B., Goullet, P. FEMS Microbiol. Lett. (1990) [Pubmed]
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