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)

Which organism causes typhoid fever? (7.10)

CSF should be refrigerated until the culture media can be inoculated. (1.14)