TABLE 1.

Bacterial strains used in this study

Species and strain	Relevant characteristic(s)	Sourcea or reference
S. pneumoniae
FT231	Serotype 19, clinical isolate	F. Tenover, CDC, Atlanta, Ga.
D39	Serotype 2, clinical isolate	7
CDC205	Serotype 3, clinical isolate	J. Butler, CDC, Atlanta, Ga.
EF3296	Serotype 4, clinical isolate	C. Svanborg Eden, University of Göteborg, Sweden
ATCC6306	Serotype 6A, clinical isolate	American Type Culture Collection
911320	Serotype 6A, clinical isolate	Our laboratory
950357	Serotype 9V, clinical isolate	Our laboratory
S1003	Serotype 11, clinical isolate	Our laboratory
ATCC6314	Serotype 14, clinical isolate	American Type Culture Collection
950312	Serotype 14, clinical isolate	Our laboratory
S1001	Serotype 15, clinical isolate	Our laboratory
800129	Serotype 18C, clinical isolate	Our laboratory
19F G	Serotype 19F, clinical isolate	Our laboratory
ATCC6323	Serotype 23F, clinical isolate	American Type Culture Collection
950110	Serotype 23F, clinical isolate	Our laboratory
S3003	Serotype 38, clinical isolate	Our laboratory
19F K	Unencapsulated variant of 19F G	Our laboratory
Rx1	Unencapsulated variant of D39	42
P376	Serotype 6A, opaque variant of clinical isolate p303	27
P765	Serotype 6B, transparent variant of clinical isolate p314	26
P62	Serotype 9V, opaque variant of clinical isolate p10	51
R189	ermAM-containing strain	2
MS9	D39, ppmA::ermAM	This study
S. bovis 961008	Clinical isolate	Our laboratory
E. faecalis ATCC29212	Clinical isolate	American Type Culture Collection

^aCDC, Centers for Disease Control.