Is Serratia a lactose fermenter?
Also know, does Serratia marcescens grown on MacConkey Agar?
Good colony separation will ensure the best differentiation of lactose fermenting and non-fermenting colonies of bacteria. Streak plate of Escherichia coli and Serratia marcescens on MacConkey agar. Both microorganisms grow on this selective media because they are gram-negative non-fastidious rods.
Subsequently, question is, is Serratia marcescens indole positive? The Biochemical identification of Serratia marcescens showed that bacteria were Gram –ve, Rod, Catalase positive, oxidase negative, lactose non- fermenter, motile, Indole negative, citrate utilization positive, TSI y/y, DNase positive and Urease negative as shown in table (1) as .
Also question is, what bacteria can ferment lactose?
Abstract. E. coli are facultative anaerobic, Gram-negative bacilli that will ferment lactose to produce hydrogen sulfide.
How do I know if I have Serratia marcescens?
marcescens to produce pyruvic acid, thus it can rely on citrate as a carbon source and test positive for citrate utilization. In identifying the organism, one may also perform a methyl red test, which determines if a microorganism performs mixed-acid fermentation. S. marcescens results in a negative test.