SUMMARY: Non-flagellate Salmonella mutants representing complementation groups and were examined for their sensitivity to the flagellotropic bacteriophage χ. and mutants were shown to be sensitive to χ by spot tests, although they were less sensitive than a parental flagellate strain; mutants were also shown to be sensitive, although even less so, by their ability to propagate the phage at the spotted area. In liquid medium neither adsorption nor propagation of χ was observed on any of these sensitive non-flagellate mutants. Electron micrographs showed that χ particles were attached to the superhooks of mutants, but the receptor sites of other sensitive non-flagellate mutants could not be recognized.


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