Biology-Online • View topic - Help with bacteria identification!

Join for Free!
122622 members

Help with bacteria identification!

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

Moderator: BioTeam

Help with bacteria identification!

Postby snowquen08 » Sun Jul 08, 2012 5:29 am

I have a project to finish and i have been trying to research which bacteria it is...

These are my test results

EMB- colony has a purple color, no sheen

TSI- yellow/yellow so it ferments glucose and lactose and/or sucrose

Urease- negative

MIO- M- pos
I - neg
O - neg

I tried to eliminate it down to klebsiella pneumoniae but the only thing wrong is the positive urease...could this just be a delayed reaction or does anyone have any ideas of what this could be?
Posts: 1
Joined: Sun Jul 08, 2012 5:24 am

Postby Cat » Sun Sep 09, 2012 7:26 pm

It's definitely NOT Klebsiella because it's motile. If I understand your results correctly, your bacteria is:

Lactose/sucrose +ve (EMB, TSA)
H2S -ve (no black in TSA)
Motility +ve
Indole -ve
Ornithine -ve
Urease -ve

Than your choices are among Citrobacter freundii, Hafnia avlei, Serratia rubideae... You either need a list of possibilities or you need to perform more tests.
King Cobra
King Cobra
Posts: 635
Joined: Thu Feb 14, 2008 7:40 pm

Return to Microbiology

Who is online

Users browsing this forum: No registered users and 0 guests