MacConkey Agar
Is selective for Gram positive

MacConkey Agar helps to differentiate lactose fermenting gram rods from Non lactose fermenting gram rods

Beta hemolytic clear, colorless, zone of hemolysis 2 to 1.2

Choose the correct answer : about the polysaccharide C antigen is present in the

No hemolysis is :

About streptococcus pyogenes it's
Motile, non sporing , encapsulated

Three type of non specific protein antigen M,T,R , is the correct? Write the reason in the comments

M antigen has no relation virulence factor

About culture character; it's obligate aerobic

Scarlet fever is caused by a strain producing

It may cause suppurative infection of skin, abrasion may lead to

Streptolysin O is true exept

The bacterial sore throat is caused by

Streptococcus pyogenes can be differentiated from other haemolytic Streptococci on the basis of

First line drugs against infection in patients with beta lactams allergies are exept

Which of the following condition is non-suppurative sequelae of Streptococcus pyogenes infections?

Scarlet fever produce erthrogenic toxin