@article{mbs:/content/journal/micro/10.1099/00221287-33-2-313, author = "Coetzee, J. N. and de Klerk, H. C. and Maré, I. J.", title = "Sodium Azide Resistance in Proteus hauseri", journal= "Microbiology", year = "1963", volume = "33", number = "2", pages = "313-323", doi = "https://doi.org/10.1099/00221287-33-2-313", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-33-2-313", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "SUMMARY: The sodium azide resistance of Proteus hauseri is not of the all-or-none unilocal type reported for Escherichia coli but rather of the obligatory multi-step or penicillin variety. Independently isolated 1st-step resistant variants possessed similar degrees of resistance to sodium azide. Some properties of azide-resistant variants of P. hauseri are described. In support of the above finding it was possible to transduce 1st-step (and only 1st-step) resistance into the wild-tpye by phage grown on either 1st-, 2nd-, 3rd- or 4th-step resistant organisms. It was also possible to transduce 2nd-step resistance into 1st-step organisms by phage developed on independently isolated 1st step resistant organisms or by phage from multi-step resistant. About 60 % of transduced genes expressed their phenotype in platings done immediately after the adsorption period. It is concluded that a number of loci, not closely linked, and possibly equipotent, control sodium azide resistance in P. hauseri and that resistance could be dominant to the wild allele.", }