GRAM POSITIVE COCCI (LECTURE)

Staphyloccocus (a catalysts positive)

-gram positiove arranged in clusters
-non sporing (no spores)
-facultative anaerobe
-responsible for breakdown of H2O2, bubbles are produced
-can tolerate hih salt concentration
-can resist heat (50C out of 30 minutes)

effervescence

other name for bubble formation

Hemolysis

it is the destruction of RBC? observed as a clear zone around the colony

Aplha hemolysis
Beta Hemolysis
Gamma Hemolyisis

Types of Hemolysis

Alpha Hemolysis

it is incomplete/ partial (greenish zone)

Beta Hemolysis

it is the total/ complete (clear/ transparent zone)

Gamma Hemolysis

has no hemolysis

Coagulase

enzyme causes the plasma to cut off

they are both speices

Non Pathogenic sprcies

Rcample is seen epidermis, used of pros

Staphyloccous epidermni

seen in epidermis

Staphyloccocus saprophyticus

UTI

S, areus
S. Epi
S. sapro

DIFFERENTITAIO OF THe THREE TYPES OF STPHHYLOCCOUS

STREPTOCOCC/US

-it is gram positive cocci in chain
-non sporing-facultative anaerobe
-catalase negative
-

Streptococcus pyogenes

-it is classified as group A producing beta hemolysis in BA
-causes acuteay basta strep thoroat

Streptococcus agalactiae

-it is group B beta hemolytic
-as normal falura

Streptococcus pneumiae

-it is gram positive lancet shaped diplococci with a capsule
-associated with lobar [neumonia (adults)
-ear infecction and meningitis