TABLE 1.

Properties of 18 Dutch serogroup A strains

Strain	Yr of isolation	Serotype	Serosubtype	Genotype
890461	1989	NTa	P1.16	Subgroup IX
890592	1989	NT	P1.16	Subgroup IX
890867	1989	NT	P1.16	Subgroup IX
891780	1989	4	P1.9	NDb
892411	1989	4	P1.10	ET-33
892665	1989	15	NSTc	ET-5 complex
900973	1990	4	P1.9	ET-48
901335	1990	NT	P1.16	Subgroup IX
902488	1990	4	P1.10	ET-33
911652	1991	NT	P1.16	Subgroup IX
911960	1991	NT	P1.16	Subgroup IX
920054	1992	4	P1.9	ET-48
920521	1992	NT	P1.16	Subgroup IX
921051	1992	4	P1.10	New
921268	1992	NT	P1.16	Subgroup IX
921710	1992	4	P1.9	ET-48
931114	1993	NT	P1.16	Subgroup IX
931192	1993	NT	P1.16	Subgroup IX

^aNT, not typeable. 

^bND, not determined. 

^cNST, not subtypeable.