Bacteria

Question 1

Causes:

1. Pharengytis (and rheumatic fever)
2. Cellulitis/Necrotizing fascitis
3. Post-strep glomerulonephritis
4. Streptooccal toxic shock

Answer 1

Streptococci pyogenes (S. pyogenes)

Question 2

Causes:

1. Skin/soft tissue infection
2. acute endocarditis

Answer 2

Staph aureus (S. aureus)

Question 3

Causes:

1. Sepsis with colon cancer

Answer 3

Strep bovis

Question 4

Causes:

1. UTIs
2. Endocarditis
3. Abdominal wound infection

Answer 4

Enterococcus

Question 5

Causes:

1. Perinatal sepsis (mother/child)

Answer 5

Streptococci agalactiae (S. agalactiae)

Question 6

Causes:

1. Subacute endocarditis

Answer 6

Viridans

Question 7

Causes:

1. Pneumonia

Answer 7

Streptococci pneumoniae (S. pneumoniae)

Question 8

Causes:

1. Foreign body infection
2. line infection

Answer 8

Staphylococcus epidermitis (S. epidermitis)

Question 9

Causes:

1. UTIs

Answer 9

Staphylococcus saprophyticus (S. saprophyticus)

Question 10

Causes:

1. Skin ulcers
2. Mediastinitis

Answer 10

Bacillus anthracis (B. anthracis)

Question 11

Causes:

1. Pharyngitis
2. Toxic cardiomyopathy

Answer 11

Corynebacteria diptheria (C. diptheria)

Question 12

Causes:

1. Meningitis
2. Sepsis

Answer 12

Listeria

Question 13

Causes:

1. Food poisoning

Answer 13

Bacillus cereus (B. cereus)

Question 14

Name three gram pos spore forming rods

Answer 14

B. anthricis
B. cereus
C. difficile

Question 15

Name two gram pos non-spore forming rods

Answer 15

Listeria

Corynebacteria diptheria

Question 16

What test do is used to determine S. pneumoniae from S. viridans?
Which one is bile sensitive and which one is bile resistant?

Answer 16

Optichin.
S. pneumoniae is optichin sensitive and bile sensitive
S. viridans is optichin resistant and bile resistant

Question 17

Name two things Enterococcus is resistant to

Answer 17

Resistant to 6.5% NaCl (which means it can grow) also resistant to bile

Question 18

What test is used to determine S. pyogenes from S. agalactiae?

Answer 18

Bacitracin.

S. pyogenes is bacitracin sensitive while S. agalactiae is bacitracin resistant

Question 19

Name the test used to determine staph from strep

Answer 19

Catalase.
Staph is catalase positive
Strep is catalase negative

Question 20

Name the test used to determine S. aureus from S. epi and S. sephro

Answer 20

Coagulase.
S. aureus is coagulase positive
S. epi and S. sephro are coagulase negative

Question 21

Name three gram negative coccobacilli and what they cause

Answer 21

Haemphilus influenza- Meningitis, Otitis media, Pneumonia, Epiglottitis –> (MOPE)
Bordatella pertussis- whooping cough
Legionella- Atypical pneumonia (associated with water)

Question 22

Name the two gram negative diplococci and whether they are maltose pos or negative

Answer 22

Neiserria gonorrhea- maltose negative

Neiserria meningitidis- maltose positive

Question 23

Name four gram negative bacilli that are lactose positive and list what they cause

Answer 23

Remember lactose pos = SEEK
Serratia- atypical pneumonia (nosocomial)
Enterobacter-atypical pneumonia (nosocomial)
E.coli- UTIs (#1 cause), neonatal meningitis, EHEC, ETEC
Klebsiella- atypical aspiration pneumonia (nosocomial)

Question 24

What test is used to determine between the different gram negative lactose negative bacilli? Name three that are oxidase pos and four that are negative

Answer 24

Oxidase.

Oxidase Positive = PVC
–> Pseudomonas, Vibrio, Campylobacter

Oxidase Negative = SSHY
–> Salmonella, Shigella, Helicobacter pylori, Yersinia

Question 25

Out of the SSHY oxidase negative gram neg bacilli, which one is urease positive?

Answer 25

H. pylori is urease pos