Open AccessReversion of Kellogg's Colonial Types of Neisseria Gonorrhoeae In Liquid Medium
Author(s) -
S Hafiz,
M. G. McEntegart,
A. E. Jephcott
Publication year - 1977
Publication title -
journal of medical microbiology/journal of medical microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 117
eISSN - 1473-5644
pISSN - 0022-2615
DOI - 10.1099/00222615-10-3-377
Subject(s) - reversion , neisseria gonorrhoeae , liquid medium , microbiology and biotechnology , colonialism , type (biology) , biology , chemistry , biochemistry , chromatography , ecology , phenotype , history , gene , archaeology
Colonial type variation of gonococci is well known, but change from type 4 to type 4 to type 1 is rare except in vivo. By observing quantitatively subcultures from a new liquid medium it was possible to follow the day-to-day changes in the ratio of colonial types present. The results obtained showed that type 1 colonies could be derived from type 5 inocula even in unsupplemented media. In unsupplemented liquid medium, type 4 inocula did not revert to other types and indeed colonial type 4 appeared to be the final form of the organism before it died out. If, however, iron in the form of ferric citrate was added to the medium, reversion occurred and type 1 colonies rapidly came to predominate.