Yes. But because it is not a lactose fermenter, the colonies will be colorless (or sometimes have a green tint).
serratia is a genus of bacteria Serratia are rod shapped, gram negative facultative anaerobes. The genus serratia belongs in the family Enterobacteriaceae. They produce a red pigment which gives colonies a characteristic pink colour.
Serratia genus as a whole is dnase positive.
No, Serratia and Klebsiella test positive for citrate. E.Coli tests negative.
No
yes it is lactose positive
No Proteus Vulgaris does not ferment lactose
lactose fermenter
E. coli
Yes. But because it is not a lactose fermenter, the colonies will be colorless (or sometimes have a green tint).
S.sonnei is not a true lactose fermenting bacteria (see.. http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=271578&blobtype=pdf)But is a delayed lactose fermenter as it does not have the enzyme permease to transport lactose through its cell wall.However an ONPG lactose fermenting test does not require permease to allow the bacterium to ferment lactose so in an ONPG test the shigella sonnei will appear as lactose fermenting positive.Hope this helps!!2nd year BMS student
Because it releases acid and gas when it ferments the lactose on the plate, which causes a color change of the colony. E. coli is a heavy lactose fermenter. This is similar to how when E. coli is grown on MacConkey agar, the colonies turn bright pink compared to a regular lactose fermenter which turns light pink and a non-lactose fermenter which is cream colored. The acid is causing a drop in pH and a reaction with the dye is occurring.
Fermenter are of two types 1. Aerobic fermenter 2. Anaerobic fermenter
Mnemonic: KEE Klebsiella pneumoniae Enterobacter cloacae E. coli Shigella sonnei can ferment lactose, but only after prolonged incubation and so it is referred to as a '''''late-lactose fermenter'''''. Vibrio cholerae is also a late lactose fermenter.
MacConkey's agar is a differential media used to differentiate between lactose fermenting and lactose non-fermenting bacteria. E.coli is a lactose fermenter whereas Pseudomonas is a lactose non-fermenter.MacConkey's agar contains lactose as fermentable sugar and when it is fermented the pH of the medium decreases which is registered by neutral red (a pH indicator).Lactose fermenters such as E.coli produce pink colonies whereas lactose non-fermenters such as Pseudomonas produces colorless colonies. So the colors of E.coli and Pseudomonas colonies are different on MacConkey's agar.
serratia is a genus of bacteria Serratia are rod shapped, gram negative facultative anaerobes. The genus serratia belongs in the family Enterobacteriaceae. They produce a red pigment which gives colonies a characteristic pink colour.
Serratia genus as a whole is dnase positive.