PMID: 7031123Dec 1, 1981Paper

Comparison of four methods of differential typing of isolates of Shigella sonnei

The Journal of Hygiene
S Helgason, D C Old

Abstract

An epidemiological study of Sonne dysentery in Dundee during the years 1971-6 was made by examining, in respect of 1420 isolates of Shigella sonnei, the discriminating power of colicine typing, antibiogram testing, biotyping and resistotyping and the stabilty of the markers they provided. Colicine typing identified nine colicine types, including four not previously described. However, because types 4 and 4 var., determined by col Ib, and type U, producing no colicines, accounted for 96% of the isolates, discrimination with colicine typing was poor. In antibiotic sensitivity test, 13 different antibiogram patterns were noted. Less than 1% of the isolates were sensitive to all of the eight antibiotics tested; most were multiply drug-resistant. Resistance to kanamycin, neomycin and paromomycin (KNP) was apparently due to a single resistance determinant, widely distributed in a majority (53%) of the isolates. When definitive times were chosen for reading each biotyping test, only maltose and rhamnose of the 13 "sugars' tested differentiated isolates into prompt- and late-fermenting types. Though the ability to ferment rhamnose was a stable property, it discriminated only 1.5% of the minority, late-fermenting type. Resistotyping wit...Continue Reading

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Citations

Oct 1, 1983·The Journal of Hygiene·H Vlajinac, S Krajinovic
Jun 1, 1982·The Journal of Hygiene·R BarkerZ Tyc
Oct 19, 2010·Journal of Microbiological Methods·Monica RawalBjørn-Arne Lindstedt
Jul 7, 2010·Journal of the Chinese Medical Association : JCMA·Bing-Yen WangYu-Chung Wu

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