Table 1.

Pneumococcal strains

StrainRelevant characteristic(s)Source or reference
D39Type 2, clinical isolate1
R6xUnencapsulated mutant derived from D3917
A66Type 31
P156Type 3, R6x Ă— A66 chromosomal DNAThis study
P125Unencapsulated, opaque variant23
P126Unencapsulated, transparent variant23
P11Type 9V, clinical isolateThis study
P13Spontaneous unencapsulated mutant of P11This study
P105Type 9V, spontaneous encapsulated revertant of P13This study
P62Type 9V, opaque variant of clinical isolate P1024
P63Type 9V, intermediate variant of clinical isolate P1024
P64Type 9V, transparent variant of clinical isolate P1024
P71Type 18C, opaque variant of clinical isolate P687
P73Type 18C, transparent variant of clinical isolate P687
P376Type 6A, opaque variant of clinical isolate P3037
P384Type 6A, transparent variant of clinical isolate P3037
P382Type 6B, opaque variant of clinical isolate P3247
P383Type 6B, transparent variant of clinical isolate P3247
P763Type 6B, opaque variant of clinical isolate P314This study
P764Type 6B, intermediate variant of clinical isolate P314This study
P765Type 6B, transparent variant of clinical isolate P314This study
P806Type 6B, spontaneous revertant of P765 to an opaque phenotypeThis study