Gram Positive Bacilli
A premature neonate suffers pneumonia and sepsis. Sputum culture on blood agar plate yields pinpointed beta-hemolytic colonies. Which of the following is a simple test to determine whether the organism is Streptococcus agalactiae or Listeria monocytogenes (these two organisms are important neonatal pathogens)?
|D||Polymerase chain reaction|
a. Catalase test is a simple test which can differentiate between the two; it is negative for Streptococcus agalactiae and positive for Listeria.
b. Though PCR can also differentiate but it is not a simple test.
c. Bacitracin test is used for differentiating S.pyogenes from other Streptococci.
d. Coagulase test is used for differentiating S.aureus from other Staphylococci.