Sample A: Sputum culture, grown on brain/heart infusion agar following test performed: gram staining: gram-positive cocci catalase: negative API:…

Sample A: Sputum culture, grown on brain/heart infusion agar
following test performed:
gram staining: gram-positive cocci
catalase: negative
API: Streptococcus pneumoniae 60.1%, Aerococcus viridian2 21.9% and Streptococcus mitis1 8.0%.
suggest any alternative or further tests that may be performed to conclusively identify the organism in question