Lec 6

Question 1

Resides in the skin and mucous membrane of humans and animals

Answer 1

Staphylococcus epidermis

Question 2

Colonies are smooth, circular and usually pale transparent white

Answer 2

Staphylococcus epidermis

Question 3

Resistant to novobiocin and nalidixic acid

Answer 3

Staphylococcus saprophyticus

Question 4

Common cause of UTI

Answer 4

Staphylococcus saprophyticus

Question 5

Recovered from compromised patients, particularly drug users, as an agent of endocarditis and septicemia

Answer 5

Stomatococcus mucilaginosus

Question 6

Drug of choice for Stomatococcus mucilaginosus

Answer 6

PCN

Question 7

No acid in glycerol in the presence of erythromycin

Answer 7

Micrococcus

Question 8

Selective and differential medium and is commonly used to isolate staphylococci from clinical specimen

Answer 8

Mannitol salt agar

Question 9

Agent of dog bite infection

Answer 9

S. intermedius

Question 10

Never been implicated as a human pathogen

Answer 10

S. hyicus

Question 11

S. aurens pigment

Answer 11

Golden yellow

Question 12

S. epidermis pigment

Answer 12

white

Question 13

S. saprophyticus pigment

Answer 13

Lemon yellow

Question 14

Majority are free living saprophytes

Answer 14

Micrococcus
Planococcus

Question 15

Inhabits surface of primates and other mammals

Answer 15

Staphylococcus and Stomatococcus

Question 16

Invade the bloodstream, metastasize and appear in the urine or forming abscess in various body organs or producing septic shock

Answer 16

Staphylococcus aureus

Question 17

Endopeptidase that cleaves the peptide linkages

Answer 17

Lysostaphin

Question 18

Grow as large, entire, very glossy, smooth, opaque, butyrous, convex

Answer 18

5% sheep blood agar of Staphylococcus saprophytics

Question 19

Gram positive cocci in tetrads

Answer 19

Micrococcus

Question 20

Micrococcus are found in?

Answer 20

1. Skin
2. Mucosa
3. Oropharynx

Question 21

Young women and in older men who have indwelling catheters

Answer 21

Cystitis

Question 22

Adhere to inorganic surfaces like catheter

Answer 22

Biofilms

Question 23

Insertion of artificial valves, prostatic devices, intravascular catheters

Answer 23

Bacterial endocarditis

Question 24

Can also be found in wounds

Answer 24

Staphylococcus aureus

Question 25

Furazilodone test is susceptible to?

Answer 25

Staphylococcus

Question 26

Differentiates micrococcal and staphylococcal species from streptococcal species

Answer 26

Catalase test

Question 27

Catalase test of Staphylococcus and Micrococcus

Answer 27

(+)

Question 28

Catalase test of Streptococcus

Answer 28

(-)

Question 29

Clumping factor

Answer 29

Bound

Question 30

Extracellular coagulase

Answer 30

Free

Question 31

Differentiate gram positive, catalase-positive cocci (micrococci from staphylococci)

Answer 31

Microdase test

Question 32

Detects the enzyme oxidase

Answer 32

Microdase test

Question 33

Conversion of fibrinogen to fibrin

Answer 33

Coagulases

Question 34

Toxic to RBCs, WBCs, platelets, and hepatocytes

Answer 34

Alpha toxin

Question 35

Toxic to WBCs, preventing clearance of the organisms

Answer 35

Gamma toxin

Question 36

Susceptible to Novobiocin

Answer 36

Staphylococcus epidermis