NAD(-GLYCOHYDROLASE PRODUCTIVITY OF HEMOLYTIC STREPTOCOCCI ASSAYED BYA SIMPLE FLUORESCENT METHOD AND ITS RELATION TO T-SEROTYPE())

The ability of haemolytic streptococci to produce NAD(+)-glycohydrolas e was investigated by a fluorescent assay. Enzyme production was found in 31 (91%) of 34 group A, 17 (61%) of 28 group C and eight (27%) of 30 group G isolates. The high producers were found in 22 (65%) of grou p A, one (4%) of group C and none of group G isolates. The high produc ers of the group A isolates belonged to T-1, T-3, T-4 or T-12 serotype . These results suggest that NAD(+)-glycohydrolase productivity of str eptococci is closely related to specific Lancefield's groups or T sero types.