%0 Journal Article %A Wittler, Ruth G. %T The L-form of Haemophilus pertussis %D 1951 %J Microbiology, %V 5 %N 5 %P 1024-1031 %@ 1465-2080 %R https://doi.org/10.1099/00221287-5-5-1024 %I Microbiology Society, %X SUMMARY: Ageing, chilling, and media containing suitable concentrations of glycine were found to stimulate the production of L-forms in cultures of Haemophilus pertussis. Stained with Giemsa these L-forms are morphologically similar to the L-forms of many other bacilli produced by similar stimuli. Serologically the L-and bacillary forms appearto be related. The suggestion is put forward that the small round red form is a ‘resistant’ form of H. pertussis and reverts to the rod by passing through the stages characteristic of the L-cycle. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-5-5-1024