Acid and gas from lactose

[jessi73]

Hi everyone!
I am trying to find the appropriate test that will tell me whether my organism makes acid and gas from lactose or not. I looked all over the place and found that a lactose fermentation test would determine that.... just checking in to see if I'm on the right path??
Thanks

[victor]

just use the lactose broth in the test tube which is also filled with Durham tube. Don't forget to put a methyl red indicator in it.
After incubation for 2-3 days in 37C, if the broth turns yellow, then your bacteria fement lactose.