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Evaluation of lysine‐iron‐cystine‐neutral red for the detection of salmonellas in the Bactometer
Author(s) -
Pettipher G.L.,
Watts Yvonne B.
Publication year - 1989
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1989.tb00336.x
Subject(s) - cystine , salmonella , lysine , enterobacteriaceae , food science , microbiology and biotechnology , chemistry , biology , bacteria , biochemistry , amino acid , escherichia coli , enzyme , gene , cysteine , genetics
Ninety‐five salmonellas and 40 non‐salmonellas were screened in the Bactometer using lysine‐iron‐cystine‐neutral red (LICNR) in order to evaluate the selectivity of the medium for the detection of salmonellas. Results for blackening of the medium in the well (indicating hydrogen sulphide, H 2 S, production) and step size are presented. Five out of 95 salmonellas tested failed to produce blackening in the well, four of these five are known to be non‐H 2 S producers. Although salmonellas generally gave a larger step value than non‐salmonellas, this criterion could not be used to distinguish reliably the two groups of organisms.