A 62-year-old man with a 30-year history of rheumatic heart disease presented with episodes of fever and chills, along with worsening signs of congestive heart failure. On examination, purpuric skin rashes were observed.

He had had a tooth removed some weeks before. 

An endocarditis was suspected. Blood cultures were taken.

In this particular patient the causative organism of the endocarditis  was:

Both blood cultures and the

culture of

his

sputum

yielded alpha-haemolytic

colonies.

A 35-year old man with a history of acute

bronchitis and smoking, presented to ER with a pneumonia.

This was the Gram-stain of

his sputum.

How would you

describe

it?

S. pyogenes

has

many virulence factors that contribute to invasion including several enzymes.

Group B streptococci usually causes

bacterial pharyngitis (strep throat).

The main reservoir of Streptococcus pyogenes

is

the

human gastrointestinal tract.

Streptococcus pyogenes

 has

been nicked-named “flesh-eating bacterium” because it causes necrotizing

fasciitis.

Which is the pathogenic mechanism

involved in

Which is the most accurate option in this case?

Which is the FALSE statement?