Look the image provided and Explain the test, Its purpose and Identify the organism on the left , based on the growth pattern

All of the following enzymes are produced by staphylococci, except

A microbiologist is reading a sputum culture on the bench. There is growth on the SBA and chocolate (CHOC) plates, but no growth on the MacConkey (MAC) plate. The colonies growing on the SBA have produced a wide, deep, clear zone of b-hemolysis around and under the colonies. What organism could this be?

Two serious complications of an infection with Group A streptococci are

Automated antimicrobial susceptibility testing methods are not reliable in detecting staphylococci resistant to this agent.

The above is an image of BAP . The specimen is a throat swab obtained from 9 year old Lilly. She woke up with sore throat difficulty swallowing and a low grade fever. Being that, it was picture day at school she decided to go to school despite feeling sick. While on the bus, she feels nauseous and her head began to hurt. She gets picked up from school and taken to to the nearest Urgent care.Her Rapid strep test was questionable and hence a throat culture was ordered. You are working on lilly’s culture. List out all the steps you would proceed with to identify the causitive agent.

DT.jpg The above picture is a D-test. The test notates

What test presumptively differentiates b-hemolytic Group A streptococci and nonhemolytic Group D enterococci from other streptococcal species?

What are the effects of the b-hemolysin produced by Staphylococcus aureus?

Look at the image below and explain the test, reactions in the tubes , its principle and the uses. TC.jpg