Shigella is an enteric pathogen that is associated with severe, bloody diarrheal disease.  Which of the following tests will differentiate Shigella from E.coli as the causative agent of disease? You may use the chart below as a reference to decide your answer.

Label A, B and C in the following figure.

In the following figure, the susceptibility of Staphylococcus aureus was tested against three antibiotics using the Kirby-Bauer method. Results showed an 11 mm clear zone (devoid of any growth) around cefoxitin (FOX); 26 mm clear zone around doxycycline (D) and no clear zone around oxacillin (OX).  Which of the following conclusions are most likely correct regarding the sensitivity of Staphylococcus aureus to antibiotics D and OX?

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? 

Which of the following statements about the organism shown in the picture is true?  

A red-hot swollen 1st big toe joint without a specific incident in a 40-year-old man is indicative of

When discussing the role of exercise and medicine with the coach of your track team, you can say that exercise can increase the duration of action of some drugs that are metabolized by the liver because:

Which of the following is the best description of an ADMINISTERED dose?

Medications that need to enter the central nervous system to reach their site of action should have what property?

Which of the following statements about nonsteroidal anti-inflammatory drugs (NSAIDs) is true?