Serial ten-fold dilutions are made from a broth culture of Erwinia carotovora in order to determine the number of bacteria in the culture. The dilution scheme is illustrated below:  What is the dilution in Tube C?

Serial ten-fold dilutions are made from a broth culture of Erwinia carotovora in order to determine the number of bacteria in the culture. The dilution scheme is illustrated below:  What is the dilution in Tube C?

These cells were stained using one of the differential staining protocols we covered in lab.  What was cellular structure was decolorized during the decolorizer step of this staining technique? 

These cells were stained using one of the differential staining protocols we covered in lab.  What was cellular structure was decolorized during the decolorizer step of this staining technique? 

Four different species of bacteria were streaked on this EMB plate and incubated. What conclusion(s) can be draw about species A?   

These cells underwent one of the differential staining protocols we covered in lab. Which bacterial genus do these cells most likely belong to?   

What are the two selective ingredients used in EMB agar?

What are the two selective ingredients used in EMB agar?

Based on the growth patterns on the agar plates: Identify the oxygen class of species B: [a] Give an example of an organism that belongs in the same temperature class as species B: [b].  (write out full genus and species)  

How many times do you place your sterile loop into the stock culture of bacteria when performing a streak plate?