Bacteria

Question 1

Peptococcus

Answer 1

Gram +
Cocci
Anaerobic

Question 2

Peptostreptococcus

Answer 2

Gram +
Cocci
Anaerobic

Question 3

Staphylococcus aureus

Answer 3

Gram + 
Cocci
Aerobic
Clusters
Catalase +
Coagulase +
More virulent type of staphylococcus

Question 4

Staphylococcus epidermidis

Answer 4

Gram + 
Cocci
Aerobic
Clusters
Catalase +
Coagulase -
Frequent contaminant of blood cultures

Question 5

Staphylococcus saprophyticus

Answer 5

Gram + 
Cocci
Aerobic
Clusters
Catalase +
Coagulase -

Question 6

Streptococcus pneumoniae

Answer 6

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
α-hemolysis
If streptococci found in respiratory culture 
Oral flora

Question 7

Viridans streptococci

Answer 7

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
α-hemolysis
Oral flora

Question 8

Streptococcus pyogenes

Answer 8

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
β-hemolysis
Group A
Pathogens of skin, pharynx, and genitourinary tract

Question 9

Streptococcus agalactiae

Answer 9

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
β-hemolysis
Group B
Pathogens of skin, pharynx, and genitourinary tract

Question 10

Enterococcus faecalis

Answer 10

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
Non-hemolytic
If streptococci found in intra-abdominal culture 
Bugs of gastrointestinal origin 
More common

Question 11

Enterococcus faecium

Answer 11

Gram +
Cocci
Aerobic
Pairs/Chains
Catalase -
Non-hemolytic
If streptococci found in intra-abdominal culture 
Bugs of gastrointestinal origin 
More resistant

Question 12

Lactobacillus

Answer 12

Gram +
Bacilli
Anaerobic

or

Gram +
Bacilli
Aerobic
Group 2

Question 13

Propionibacterium

Answer 13

Gram +
Bacilli
Anaerobic
Common skin contaminant

Question 14

Actinomyces

Answer 14

Gram +
Bacilli
Anaerobic

Question 15

Clostridium

Answer 15

Gram +
Bacilli
Anaerobic
If Gram + bacilli from necrotizing wound infection

Question 16

Corynebacterium

Answer 16

Gram +
Bacilli
Aerobic
Group 1
Common skin contaminant

Question 17

Listeria

Answer 17

Gram +
Bacilli
Aerobic
Group 1
If Gram + bacilli from CSF culture

Question 18

Gardnerella

Answer 18

Gram +
Bacilli
Aerobic
Group 2

Question 19

Bacillus

Answer 19

Gram +
Bacilli
Aerobic
Group 2
Common skin contaminant

Question 20

Cocci

Answer 20

Spheres

Most medically important Gram + pathogens

Question 21

Bacilli

Answer 21

Rods

Question 22

Bacteroides

Answer 22

Gram -
Bacilli
Anaerobic

Question 23

Prevotella

Answer 23

Gram -
Bacilli
Anaerobic

Question 24

Fusobacterium

Answer 24

Gram -
Bacilli
Anaerobic

Question 25

Vibrio

Answer 25

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter ```

Question 26

Aeromonas

Answer 26

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter ```

Question 27

Escherichia

Answer 27

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 28

Klebsiella

Answer 28

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 29

Serratia

Answer 29

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 30

Enterobacter

Answer 30

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 31

Citrobacter

Answer 31

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 32

Proteus

Answer 32

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 33

Salmonella

Answer 33

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 34

Shigella

Answer 34

``` Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod ```

Question 35

Pseudomonas

Answer 35

``` Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance ```

Question 36

Acinetobacter

Answer 36

``` Gram - Bacilli (may appear as coccobacilli) Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance ```

Question 37

Stenotrophomonas

Answer 37

``` Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance ```

Question 38

Burkholderia

Answer 38

``` Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance ```

Question 39

Haemophilus

Answer 39

``` Gram - Bacilli (may appear as coccobacilli) Aerobic Fastidious organism HACEK organism ```

Question 40

Campylobacter

Answer 40

Gram - Bacilli Aerobic Fastidious organism

Question 41

Helicobacter

Answer 41

Gram - Bacilli Aerobic Fastidious organism

Question 42

Bartonella

Answer 42

Gram - Bacilli Aerobic Fastidious organism

Question 43

HACEK organisms

Answer 43

``` Haemophilus Actinobacillus Cardiobacterium Eikenella Kingella ``` Gram - Bacilli Aerobic Fastidious organism

Question 44

Fastidious organisms

Answer 44

Picky eaters Grow slowly Require specially supplemented media May take few days to few weeks to grow in culture

Question 45

Neisseria

Answer 45

Gram - Cocci Useful in preliminary identification of meningitis; strongly suggests Neisseria meningitidis

Question 46

Moraxella

Answer 46

Gram - | Cocci (may appear as coccobacilli)

Question 47

Actinobacillus

Answer 47

HACEK organism

Question 48

Cardiobacterium

Answer 48

HACEK organism

Question 49

Eikenella

Answer 49

HACEK organism

Question 50

Kingella

Answer 50

HACEK organism