TABLE 4.

Genotyping of S. aureus strains isolated in nasal carriers in 1988 and 1995

Carrier no.	Carrier indexa	Yr of culture	Isolation of S. aureus	Genotyping
				RAPD	PFGE	No. of protein A repeatsb	Coagulase gene
1	0.80	1988	Yes	NDc	ND	ND	ND
		1995	No
2	0.83	1988	Yes	AAA	A	3	A
		1995	Yes	BBB	B	9	B
				CBB	C	13	C
3	0.83	1988	Yes	ND	ND	ND	ND
		1995	No
4	0.83	1988	Yes	DCC	D	10d	D
		1995	Yes	EAA	E	3	A
				BBD	B	10d	B
5	0.83	1988	Yes	BBB	B	10d	B
		1995	Yes	BBD	F	11	E
				BBD	G	11	E
				BBD	F	10d	E
6	0.83	1988	Yes	FDEd	H	12	F
		1995	Yes	FDEd	I	7	B
7	0.83	1988	Yes	ND	ND	ND	ND
		1995	No
8	0.92	1988	Yes	ND	ND	ND	ND
		1995	No
9	0.92	1988	Yes	AAA	J	1	A
		1995	Yes	FDF	G	11	E
10	0.92	1988	Yes	ND	ND	ND	ND
		1995	No
11	1.00	1988	Yes	AAA	A	9	A
		1995	Yes	GDE	Ge	13	E
				GDE	Ke	13	E
12	1.00	1988	Yes	HCCd	Ld	9	Ed
		1995	Yes	HCCd	Ld	5	Ed
				ICC	M	5	Ed
13	1.00	1988	Yes	AEAd	Ad	7d	Ad
		1995	Yes	AEAd	Ad,f	7d	Ad
				AEAd	Nf	7d	Ad
14	1.00	1988	Yes	DCCd	Od	9d	Gd
		1995	Yes	DCCd	Od	9d	Gd
15	1.00	1988	Yes	HCC	D	10d	Ed
		1995	Yes	JBB	B	10d	Ed
16	1.00	1988	Yes	GCG	C	10	E
		1995	Yes	FBE	P	9	F
17	1.00	1988	Yes	FDF	G	8d	H
		1995	Yes	BBB	B	8d	B
Total no. of genotypes				15	14	10	8

^aThe carrier index is defined as the proportion of nasal cultures yielding S. aureus for a given individual. 

^bThe number of protein A repeats as assessed by RFLP analysis. 

^cND, not done. 

^dLong-term persistence of molecular type. 

^eClosely related genotypes; only a two-band difference. 

^fClosely related genotypes; only a three-band difference.