Litmus Milk Reactions

The litmus milk reactions allows us to see our bacteria's ability to utilize lactose, protein, and litmus in litmus milk. 

First we obtained a litmus milk tube and used the aseptic technique to inoculate the litmus milk tube with a loopful of bacteria from our agar slant culture.

We then incubated the inoculated tube at 35 degrees Celsius for two days.

When we came back to lab two days later we found that our tube showed acid curdling with litmus reduction. Unfortunately, we did not get a picture of it as we accidentally mixed the tube forming what is shown below.