Assignment Task:
On the first day of examination of the primary plates of an eye culture from a 10-year-old female, the following results were noted:
BAP: moderate growth of small, alpha-hemolytic colonies showing some depressions in the center of each colony
CHOC: moderate growth of small, colonies showing depressions in the center of each and surrounded by a green zone of discoloration
MAC: no growth
Results of testing of the alpha hemolytic colony:
Gram stain: gram-positive cocci in pairs and short chains
Catalase: no bubbles
Optochin susceptibility: 16 mm
Susceptibility testing on Mueller-Hinton with sheep blood agar against 1 μg oxacillin: 17 mm
Given the testing results above, this organism is possibly a: Want Professional Help?
a. penicilln-sensitive Streptococcus pneumoniae
b. penicillin-resistant Streptococcus pneumoniae
c. penicillin-resisitant Streptococcus viridans
d. penicillin-sensitive Streptococcus viridans