A patient went to the ER with severe wound infection of the…

A patient went to the ER with severe wound infection of the leg after swimming in a lake.  Gram staining of a sample from his wound showed the following results.  Based on this picture, the bacteria isolated from the wound can be described as which of the following?

In an experiment, 1 mL of a bacterial sample was serially di…

In an experiment, 1 mL of a bacterial sample was serially diluted with 9 mL of water.  1 mL of each dilution was plated on nutrient agar and incubated at an appropriate temperature to visualize colonies.   Based on the following scheme of dilution, which answer best describes the bacterial concentration ( CFU/mL) in the original sample? 

You are given a sample of bacteria at a concentration of 3 x…

You are given a sample of bacteria at a concentration of 3 x 106 CFU/mL.  After mixing the sample , you transfer 1 mL into 99 mL of fresh media and label this Tube 1.  You mix the contents of Tube 1 and transfer 1 mL into 9 mL of fresh media and label this Tube 2.  Based on this dilution scheme, the estimated CFU/mL of  bacteria in Tube 2 should be: