The identification of bacteria by serologic tests is based on the presence of specific antigens. Which of the following bacterial components is least likely to contain useful antigens?
Each of the following statements concerning the Gram stain is correct except:
An outbreak of sepsis caused by Staphylococcus aureus has occurred in the newborn nursery. You are called upon to investigate. According to your knowledge of the normal flora, what is the most likely source of the organism?
Each of the following organisms is an important cause of urinary tract infections except:
A 30-year woman has non-bloody diarrhea for the past 14 hours. Which one of the following organisms is least likely to cause this illness?
Each of the following agents is a recognized cause of diarrhea except
Each of the following statements about the classification of streptococci is correct except
Which of the following bacteria has the lowest 50% infective dose (ID50)?
Which of the following disease is best diagnosed by serologic means?
The coagulase test is used to differentiate