Escherichia coli can have many serotypes that cause different diseases.  O157:H7 is recognized as causing hemolytic uremic syndrome (HUS) and can be isolated and differentiated by inoculating _______ agar. (7.7)

Which of the following is NOT an antimicrobial mechanism of action? (16.1)

The main difference between Gram positive and Gram negative bacteria is that Gram positive bacteria have a thick layer of ________ that enables the bacteria to retain the primary stain.  (1.4)

Match the following organisms to their correct Lancefield group antigen classification: 

Which of the following designates antigens found on bacterial flagellum? (7.6)

What do the pink colonies on MacConkey agar indicate?  (1.35)

Define chemotroph.

Which term is NOT a type of stain used in clinical microbiology? (TC-obj. 2)

Which of the following items are reasons to reject a specimen for culture?  (1.15)

What genus is NOT a Gram positive coccus?  (4.1; 5.1)