Gram Positive Bacteria Identification

Question 1

This purulent tonsillar exudate is exemplary of “Strep Throat”. What specific strain is this most often related too?

Answer 1

Streptococcus Pyogenes

Question 2

This purulent/inflammatory disease is caused by what strain of bacteria?

Answer 2

S. Aureus

Question 3

This diffuse pink-red blanchable rash usually follows a bacterial pharyngitis.

What strain of bacteria causes the associated toxigenic disease and what is its name?

Answer 3

Streptococcus Pyogenes

causing Scarlet Fever

Question 4

Impetigo, Erysipelas, and Cellulitis are often caused by which strain of bacterial infection?

Answer 4

Streptococcus Pyogenes

Question 5

This green-brown hue defines the hemolysis of what two strains of streptococcus?

Answer 5

S. Pneumoniae and S. Viridans

Question 6

What are these grape-like bacteria called?

Answer 6

Staphylococcus spp.

Question 7

What is this toxic infection and what causes it?

Answer 7

Scalded Skin Syndrome

Cause: S. Aureus

Question 8

This patient is bacteremic and positive for pyrogenic exotoxins. What syndrome is he experiencing?

Answer 8

Streptococcal Toxic Shock Syndrome

Question 9

Necrotizing fasciitis or gangrene caused by streptolysins is due to what strain of bacteria?

Answer 9

Streptococcus Pyogenes

Question 10

This patient has lobar pneumonia and is producing blood-tinged or “rusty” sputum.

What is the most likely etiology?

Answer 10

Streptococcus Pneumoniae

Question 11

This clear-gold hue defines the hemolysis of what two strains of streptococcus?

Answer 11

S. Pyogenes and S. Agalactiae

Question 12

here are encapsulated diplococci comprising which strain of bacteria?

Answer 12

Streptococcus Pneumoniae

Question 13

The toxigenic strain of this bacteria causes pseudomembranous tonsillar infections, which causes unique bleeding if removed

Answer 13

C. Diphtheriae

Question 14

These bile tolerant, PYR+, pairs and chains of cocci are typical of what type of bacteria?

Answer 14

Enterococcus spp.

Question 15

What are these chain-like bacteria?

Answer 15

Streptococcus

Question 16

This strawberry tongue is a hallmark of what toxigenic disease?

What bacterial strain causes this?

Answer 16

Scarlet Fever caused by Streptococcus Pyogenes’ erythrogenic toxin

Question 17

Which bacterium is cold-growing, facultative intracellular anaerobe with a characteristic rocket tail?

Answer 17

Listeria Monocytogenes

Question 18

Differentiated from its sister strain, this bacterium is beta hemolytic and less chaining

Answer 18

Bacillus Cereus

Question 19

This bacterium inhibits host cell protein synthesis via ADP-ribosylation of EF-2

Answer 19

Corynebacterium Diphtheriae

Question 20

Defined by its club-shaped (maraca-shaped) bacilli/rods, this bacteria produces a toxin that binds to heparin-binding epidermal growth factor

Answer 20

Corynebacterium Diphtheriae

Question 21

This gram-positive bacteria has characteristic toxin comprised of:

Protective Antigen

Edema Toxin

Lethal Toxin

What type of bacteria is this?

Answer 21

Bacillus Anthracis

Question 22

This disease can cause cutaneous ulcers, and occupational history is helpful in its diagnosis

Answer 22

Bacillus Anthracis

Question 23

Which of the following demonstrates streptococcus pneumoniae?

(left/middle/right)

Answer 23

Left

Question 24

Helpful in the differential of Streptococcus strains, this absence of hemolysis is indicative of what type of bacteria?

Answer 24

Enterococcus