The Sixth Meeting of the Subcommittee on the Phage-Typing of Staphylococci was held in Brno, Czechoslovakia, on September 26, 1974. The meeting was chaired by R. Skalova, with E. Asheshov as Secretary. The attendees included various members and representatives from different countries. The meeting reviewed the previous meeting's minutes, discussed membership changes, and evaluated the 6th comparative typing test. The Subcommittee recommended continuing the tests as they were. Regarding the medium for staphylococcus phage typing, the Subcommittee agreed that an international standard medium was not feasible due to agar supply issues. They suggested using the same medium as much as possible and encouraged economical modifications in typing methods. Seven experimental phages were evaluated, with three (94, 95, and 96) recommended for inclusion in the basic set due to their utility in typing untypable strains. The basic set was modified to accommodate these new phages, removing phages 42D and 187. The Subcommittee decided to use all phages at both RTD and RTD × 100 concentrations to improve typability and epidemiological recognition. A trial was proposed to test the feasibility of using a single concentration of phage for typing. The use of additional phages was also discussed, with the decision to accept reactions with these phages without re-typing strains at RTD × 100. The Subcommittee also addressed the use of experimental phages, deciding to discontinue the requirement for re-typing strains with basic-set phages at RTD × 100. This change was made to save time and material, though it might affect the recognition of similar strains typed in different countries. The Subcommittee noted that the spread of epidemic staphylococcal strains has decreased, making this issue less critical. The Subcommittee on the Taxonomy of Listeria and Related Bacteria met on September 23 and 25, 1974, in Nottingham, England. The meeting was chaired by H. J. Welshimer, with D. Jones as Secretary. The attendees included J. Donker-Voet, N. Ivanov, D. Jones, S. Ortel, B. S. Ralovich, H. P. R. Seeliger, and M. Woodbine. The meeting discussed proposed species names for Listeria, minimal standards for examination and identification, and other related taxa. A list of methods for identifying Listeria and related bacteria was presented, and the next meeting was scheduled for 1977 in Bulgaria or Spain.The Sixth Meeting of the Subcommittee on the Phage-Typing of Staphylococci was held in Brno, Czechoslovakia, on September 26, 1974. The meeting was chaired by R. Skalova, with E. Asheshov as Secretary. The attendees included various members and representatives from different countries. The meeting reviewed the previous meeting's minutes, discussed membership changes, and evaluated the 6th comparative typing test. The Subcommittee recommended continuing the tests as they were. Regarding the medium for staphylococcus phage typing, the Subcommittee agreed that an international standard medium was not feasible due to agar supply issues. They suggested using the same medium as much as possible and encouraged economical modifications in typing methods. Seven experimental phages were evaluated, with three (94, 95, and 96) recommended for inclusion in the basic set due to their utility in typing untypable strains. The basic set was modified to accommodate these new phages, removing phages 42D and 187. The Subcommittee decided to use all phages at both RTD and RTD × 100 concentrations to improve typability and epidemiological recognition. A trial was proposed to test the feasibility of using a single concentration of phage for typing. The use of additional phages was also discussed, with the decision to accept reactions with these phages without re-typing strains at RTD × 100. The Subcommittee also addressed the use of experimental phages, deciding to discontinue the requirement for re-typing strains with basic-set phages at RTD × 100. This change was made to save time and material, though it might affect the recognition of similar strains typed in different countries. The Subcommittee noted that the spread of epidemic staphylococcal strains has decreased, making this issue less critical. The Subcommittee on the Taxonomy of Listeria and Related Bacteria met on September 23 and 25, 1974, in Nottingham, England. The meeting was chaired by H. J. Welshimer, with D. Jones as Secretary. The attendees included J. Donker-Voet, N. Ivanov, D. Jones, S. Ortel, B. S. Ralovich, H. P. R. Seeliger, and M. Woodbine. The meeting discussed proposed species names for Listeria, minimal standards for examination and identification, and other related taxa. A list of methods for identifying Listeria and related bacteria was presented, and the next meeting was scheduled for 1977 in Bulgaria or Spain.