Enterobacteriaceae general information

What genera are found within the enterobacteriaceae family?

escherichia, shigella, klebsiella, proteus, morganella, edwardsiella, providencia, salmonella, yersinia, enterobacter, serratia, hafnia, citrobacter

Throughout the enterobacteriaceae family, which of the genera are considered intestinal pathogens?

Salmonella, shigella, yersinia

What kinds of antigens can we find on enterobacteriaceae?

O (somatic), H (flagellar), and K (capsular)

Somatic (O) antigens are heat _____.

stable

Flagellar and capsular antigens are heat ______.

Labile

What is the capsule antigen symbol for salmonella typhi?

Vi

What is the capsule antigen symbol for E. coli?

K1

What are the three biochemical tests that all enterobacteriaceae share?

1. Oxidase negative (except plesiomonas)

2. glucose fermenters (TSI rxn will always have /A)

3. nitrate to nitrite reduction

Which genera of enterobacteriaceae produce H2S gas?

Edwardsiella, citrobacter, proteus, salmonella

Which genera of enterobacteriaceae can hydrolyze gelatin?

proteus, serratia

Which genera of enterobacteriaceae can hydrolyze urea?

morganella, proteus, most klebsiellaW

Which genera of enterobacteriaceae are non-motile?

Klebsiella, shigella, EIEC, some yersinia

What does the K/K result stand for in the TSI reaction?

no fermentation of lactose/sucrose / no glucose fermentation

What does the K/A result stand for in the TSI reaction?

no fermentation of lactose/sucrose / fermentation of glucose

What does the A/A result stand for in the TSI reaction?

fermentation of lactose/sucrose / fermentation of glucose

If H2S is produced in a TSI slant, where in the slant will that occur, and what type of fermentation does it indicate?

butt of the slant, indicates glucose fermentation