Please type your answer WHICH COVERS BOTH PARTS • BASED ON THESE TESTS AND RESUL
ID: 271067 • Letter: P
Question
Please type your answer WHICH COVERS BOTH PARTS
•BASED ON THESE TESTS AND RESULTS, we identify the unknown microbe is Staphylococcus. The microbe is originally isolated from skin infections among pigs and was formerly called Microccus hyieus. PLEASE GIVE THE
A) Colony characteristics / Size /Shape / Color (also known as pigmentation) / Texture/ Height (a.k.a. elevation) /Edge (a.k.a. margin) of Staphylococcus consisting of clustered cocci.
B) ACCORDING TO TABLE TESTS AND RESULTS, WHICH ONE OF THESE tests FOR THIS IDENTIFICATION ARE MORE RELIABLE AND LESS RELIABLE
EMB TEST
ACID & FERMENTATION WEAK
PEA
G+/ STAPHYLOCOCCUS
CATALASE
( +) HAVING CATALYST ENZYME
OXIDASE
(-)NO HAVING CYTOCHROME C OXIDASE
PHENOL RED
ACIDIC/ NO GAS PRODUCED
BREWER JAR
AEROBIC
MR/VP TEST
(-)(-) NO FERMENTATION /YELLOW COLLOR
NITRATE TEST
PARTIAL RED (+)
M.I.O
YELLOW - MOTILITY& ORNIHITIN ARE (-)
PEPTON IRON AGAR
(+) H2S PRODUCED
PHENYLALANINE TEST
YELLO COLOR(-)
STARCH
(-) NO PRODUCE AMYLASE ENZYME
SIMMONS CITARATE AGAR
(-) GREEN COLOR
UREASE TEST
YELLOW/ DON'T PRODUCE UREASE ENZYME
GELATINE TEST
LIQUID (+)
MANNITOL SALT AGAR
(+)/ SALT TOLERANT & A LITTLE FERMENTATION
MACcONKEY AGAR
G+/ NO GROWTH
BLOOD AGAR
BETA
KIRBY BAUER
SENSITIVE TO PENICILLIN (P10)
EMB TEST
ACID & FERMENTATION WEAK
PEA
G+/ STAPHYLOCOCCUS
CATALASE
( +) HAVING CATALYST ENZYME
OXIDASE
(-)NO HAVING CYTOCHROME C OXIDASE
PHENOL RED
ACIDIC/ NO GAS PRODUCED
BREWER JAR
AEROBIC
MR/VP TEST
(-)(-) NO FERMENTATION /YELLOW COLLOR
NITRATE TEST
PARTIAL RED (+)
M.I.O
YELLOW - MOTILITY& ORNIHITIN ARE (-)
PEPTON IRON AGAR
(+) H2S PRODUCED
Explanation / Answer
Staphylococus colonies are large , smooth shiny , circular and pigmented ( golden yellow ). Its size is about 1-4 milimeter.
They are round and convex with a sharp border. The color of the colony can be white / golden yellow / lemon yellow. They are smooth . They might be surrounded by a zone of beta hemolysis .
More reliable tests in this are :
Blood agar
Mannitol salt agar
Phenol red
MR/ VP test
simmons citrate agar
Phenylalanine test