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Table 1 Wild type and mutant pneumococcal strains used

From: A point mutation in cpsE renders Streptococcus pneumoniae nonencapsulated and enhances its growth, adherence and competence

Strain Serotype Origin/comment
307.14 encapsulated 18C Nasopharyngeal isolate
307.14 nonencapsulated nonencapsulated Nasopharyngeal isolate
307.14Δcps:: Janus nonencapsulated Laboratory mutant: strain 307.14 encapsulated which has had its capsule operon replaced by a Janus cassette
307.14 cap+ 18C Capsule switch mutant: 307.14 nonencapsulated which has had its capsule operon replaced by that of 307.14 encapsulated
307.14 cap- nonencapsulated Capsule switch mutant: 307.14 encapsulated which has had its capsule operon replaced by that of 307.14 nonencapsulated