15. Which of the following media combinations is the most appropriate for a routine wound culture?

19. A gram stained smear was prepared from a colony of E. coli. The results were gram-positive rods.  The scientist should:

2. One of the foremen at a pig farm notices purple sores on one of his workers. The worker has not been feeling well for the last two weeks, so the foreman sends him to the doctor. The doctor takes scrapings from the sores and sends them to the laboratory for a culture and sensitivity. The Gram stain shows 3+ thin, gram-positive rods that have filaments. The culture plates were examined the next day and revealed gamma-hemolytic, pinpoint, transparent colonies. Catalase was negative and TSI showed faint H2S production along the stab line.  What is the most likely pathogen?

3. Microaerophiles (microaerobic) are bacteria that grow

1. A turbid blood culture bottle grew a flat, grey, non-hemolytic colony on BAP.  The gram stain reveled gram positive cocci.  The colonies were determined to be catalase negative.  Which of the following tests are most needed to identify this organism?

7. A stool specimen is submitted with a request for a Campylobacter culture.  The best culture method is:

  x 0 1 2 3 4 5 6 7 8 9 P(x) 0.09 0.12 0.11 0.08 0.09 0.13 0.10 0.07 0.10 0.11     A random number generator is set to generate single digits between 0 and 9. One hundred and fifty random numbers are generated. The probability distribution for this random number generator is given below. What is the mean of this distribution?  (Do not round.)

9. A stool culture had the following results:  BAP: mixed flora, HEK media:  clear green colonies with black centers and a rare yellow colony.  The technologist should:

1. A turbid blood culture bottle grew a flat, grey, non-hemolytic colony on BAP.  The gram stain reveled gram positive cocci.  The colonies were determined to be catalase negative.  Which of the following tests are most needed to identify this organism?

4. A patient exhibits abdominal cramps, diarrhea, vomiting, fever and chills, and a bloody stool 10 to 12 hours after eating.  Which would be most likely to grow from the patient’s stool culture?