A bacteria that produces a characteristic purple pigment

40. A Staphylococcus species recovered from a wound (cellulitis) was negative for the slide coagulase test (clumping factor) and negative for novobiocin resistance.  The next test(s) needed for identification is (are): tube coagulase test beta-hemolysis on blood agar mannitol-salt agar plate all listed answers 

Which of the following is the media of choice for growing Legionella spp.?

  18. A test for the hydrolysis of esculin in the presence of bile is especially useful in identifying species of the genus _____. 1. Haemophilus    2. Neisseria 3. Enterococcus                4. Staphylococcus

Twenty patients on a surgical ward develop urinary tract infections after catheterization.  In each instance, the isolated organism grows sheep blood agar as a large, gray colony, and on MacConkey agar as a large, flat, pink colony.  The oxidase-negative, gram-negative rod produces the same biotype and is resistant only to tetracycline.  Additional biochemical results are as follows:               Phenylalanine deaminase (PAD): negative             Urease: negative             Hydrogen sulfide (H2S): negative             Lysine decarboxylase: positive             Ornithine decarboxylase: positive             Indole: positive             Citrate: negative

12. What is the purpose of making cuts in the sheep blood agar when a throat culture is plated? To count the colonies growing after incubation To observe the appearance of any hemolysis present To determine whether the organism is lactose positive or negative To note the morphologic appearance of the colony growth

Which of the following DOES NOT grow on BAP nor CHOC agar.

22. In the CAMP test a single streak of a beta-hemolytic streptococcus is placed perpendicular to a streak of beta-lysin-producing Staphylococcus aureus. After incubation a zone of increased lysis in the shape of an arrowhead is noted, which indicates the presumptive identification of _____.   S. bovis  S. pyogenes S. agalactiae    S. equinus

The enteric ___ antigens are located on the flagella

29. Staphylococcus aureus causes a wide variety of infections, ranging from wound to pneumonia. Treatment with penicillin has not been effective because of the   inability of penicillin to penetrate the membrane of aureus antagonistic reactions caused by penicillin production of beta-lactamase by aureus production of penicillin acetylase by aureus