<prompt> Which of the following isare feature of streptococcus agalactiae rather than staphylococcus aureus?Catalase positiveBacitracin resistantCoagulase negativea hemolysis  <response>: C. Coagulase negativeb hemolysis and bacitracin resistance occur in bothStaphylococcus AureusCoagulase Positive: Ananthanarayan Whf2l0Beta type of hemolyisis on blood agar-Microbiology by Baveja 5th175Streptococci- coagulase negative Ananthanarayan lQ7h218 Lancefield group B consists of a single species, S. agalactiae, which is definitively identified with specific antiserum to the group B cell wall-associated carbohydrate antigen. A streptococcal isolate can be classified presumptively as GBS on the basis of biochemical tests, including hydrolysis of sodium hippurate in which 99 of isolates are positive, hydrolysis of bile esculin in which 99-100 are negative, bacitracin susceptibility in which 92 are resistant, and production of CAMP factor in which 98-100 are positive. CAMP factor is a phospholipase produced by GBS that causes synergistic hemolysis with p lysin produced by certain strains ofS. aureus-Harrison 19th969Staphylococci produce catalase, which converts hydrogen peroxide into water and oxygen. The catalase test differentiates the staphylococci, which are positive, from the streptococci, which are negative- Jawetz 27th205Ananthanarayan 10th210Species or common nameLancefield groupHemolysisLaboratory testS. pyogenesABetaBacitracin-sensitive, PYR test-positive; Ribose not fermntedS. agalactiaeBBetaCAMP test, Hippurate hydrolysisBacitracin Test microbeonline.com Positive: Streptococcus pyogenes Negative: Streptococcus agalactiaeThe bacitracin test is useful for differentiating b-hemolytic Group A streptococci from b-hemolytic non-Group A streptococci. This is important because most streptococcal diseases are caused by Group A streptococci. The bacitracin test can also be used to differentiate the bacitracin-resistant Staphylococcus from the bacitracin-susceptible Micrococcus 