The strains listed within this document belong to the Lancefield Collection and include nearly all of the strains collected by Dr. Lancefield during her career at The Rockefeller Institute. In many cases, the use of these strains was first described in scientific publications by Dr. Lancefield(opens in new window) and have continued to be the focus of basic research of the streptococcus. Of foremost interest, are the M serotype reference strains(opens in new window) that have provided the basis of typing group A streptococci(opens in new window).
The collection database is constructed as follows:
Over 6,000 streptococcal strains, that are only partially annotated, are organized according to group(opens in new window). In addition, the group A streptococci strains are listed according to M serotype(opens in new window), disease outbreak(opens in new window) and strain series(opens in new window). A directory of M serotyping strains(opens in new window) has also been compiled. Within each list are links to one or more annotated files, each describing an individual strain, within a directory containing 1,200 strain files(opens in new window). Each file contains important information about a strain, including: group, M serotype, hemolytic activity, site of isolation, and disease association. Where possible, the strain listings and each M serotype are cross-referenced with journal papers by Dr. Lancefield that make mention of the strain; for example, see strain A963(opens in new window).
Streptococcal Strain Directory:
Over 6,000 strains, partially annotated listings.
- Group Strain Directory and Reference Strains(opens in new window).
- Group A Streptococci:
- Strain Series Listing(opens in new window).
- Rheumatic Fever Outbreak Associated Strains(opens in new window).
- M type Reference Strains(opens in new window).
- Strain Directory (M type 1 to 67)(opens in new window).
- Dr. Lancefield’s Bibliography and Associated Strains(opens in new window).
- Fully annotated strain listings(opens in new window). 1,200 strains searchable by query:
We apologize for inadvertant omissions and errors produced in the transcription of Dr. Lancefield’s original notes. Please bring any that you might notice to our attention. For further information, either about strains or their acquisition, please contact Dr. Vincent A. Fischetti by e-mail(opens in new window).