What test will show you the difference between Proteus vulgaris and Morganella morganii?

Answer 1

alpha-glucosidase test: using 5-bromo-4-chloro-3-indolyl-alpha-D-glucopyranoside (included in chromogenic media), but not using alpha-methyl-glucoside fermentation. Cronobacter (E. sakazakii) are positive for this test and E. aerogenes are negative.

Answer 2

AnswerE. aerogenes has a negative result in inositol fermentation test, and E. cloacae has a positive one.

Enterobacter aerogenes produces hydrogen gas and Enterobacter cloacae doesn't

Answer 3

The Klebsiella genus are non-motile while Enterobacter are motile. By performing a motility test on the two cultures you should have your answer. In fact, a synonym for Enterobacter aerogenes is Klebsiella mobilis. Have Fun!

Answer 4

Test for Urea. Enterobacter aerogenes for test negetive and Klebsiella pneumoniae will test positve.

Answer 5

hydrogen sulfide test. proteus Vulgaris is H2S-positive. enterobacter aerogenes is H2S-negative.

Answer 6

Ornithine. Proteus vulgais will be negative for ornithine and Morganella morganii will be positive for ornithine.

Answer 7

TSI

Serratia marcescens: red slant; yellow butt

Enterobacter Cloacae: red slant; red butt

-Adam C.