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Serotype and sulphonamide sensitivity of meningococci isolated from 1966 to 1971
  1. J. D. Abbott,
  2. J. F. R. Graves
  1. Public Health Laboratory, Withington Hospital, Manchester


    From 1966 to 1971, 298 cultures of meningococci from clinical material (cerebrospinal fluid or blood) were examined. Eighty-nine cultures were from the Manchester area and the remainder from other parts of England or Northern Ireland. Five per cent of strains were group A, 57% group B, and 31% group C; 6% were untypable. Eighteen strains (6%) had an MIC of 6·4 μg/ml or more of sodium sulphadiazine and 10 of these (3·5%) an MIC of 50 to 100 μg/ml. The incidence of sulphonamide resistance was higher in group A strains than in group B or group C strains.

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