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MacConkey Agar: selects for gram negative bacteria (pink) (GROWING? (A.…
MacConkey Agar: selects for gram negative bacteria (pink)
Nutrient Agar
RODS
A. faecilis
2 areas of stripes, 1 area of large dots, yellow/cream color
B. subtilus
off-yellow color, curdled milk texture
E. coli
1 area of stripes, 1 area of dots, off yellow color
P. fluorescens
Cream color, stripes
COCCI
M. luteus
1 area of thick stripes, 1area of very small dots, bright mustard color
S. epidermidis
limited growth, very small off white dots
Mannitol Salt Agar: selects for gram positive bacteria (purple)
GROWING?
S. epidermidis
agar is hot pink, 1/3 area of white growth, very small dots in lines
GROWING AND FERMENTING MANNITOL?
B. subtilus
bright yellow big dots, 1/3 area of stripes/small dots, agar is dark purple
GROWING?
A. faecalis
faint purple, 1/2 area of stripes, 1/4 area of medium dots, agar is purple/brown
P. fluorescens
agar is tea color, faint stripe growth all over agar
GROWING AND FERMENTING LACTOSE
E. coli
ferments bright purple, 1/3 thick stripes, small area of small dots