Bacteriology 1

Question 1

streptococcal pharyngitis

Answer 1

streptococcus pyogenes
Group A lancefield
Beta hemolytic

Bacitracin sensitive
M protein
Streptolysin S & O

Gram positive
catalase -

Question 2

scarlet fever

Answer 2

streptococcus pyogenes
Group A lancefield
Beta hemolytic

Bacitracin sensitive
M protein
Streptolysin S & O

Gram positive
catalase -

Question 3

rheumatic fever

Answer 3

sequelae (most dangerous: heart)

streptococcus pyogenes
Group A lancefield
Beta hemolytic

Bacitracin sensitive
M protein
Streptolysin S & O

Gram positive
catalase -

Question 4

puerperal fever

Answer 4

septicemia following child birth

streptococcus pyogenes
Group A lancefield
Beta hemolytic

Bacitracin sensitive
M protein
Streptolysin S & O

Gram positive
catalase -

Question 5

erysipelas

Answer 5

massive brawny edema

streptococcus pyogenes
Group A lancefield
Beta hemolytic

Bacitracin sensitive
M protein
Streptolysin S & O

Gram positive
catalase -

Question 6

neonatal meningitis

Answer 6

streptococcus agalactiae
group B lancefield
beta hemolytic

gram positive
catalase -

Question 7

neonatal pneumonia

Answer 7

streptococcus agalactiae
group B lancefield
beta hemolytic

gram positive
catalase -

Question 8

neonatal sepsis

Answer 8

streptococcus agalactiae
group B lancefield
beta hemolytic

gram positive
catalase -

Question 9

adult otitis media

Answer 9

streptococcus pneumoniae
kidney bean

group B lancefield
alpha hemolytic

quellung reaction (methylene blue)
optochin test

Gram +
catalase -

Question 10

adult meningitis

Answer 10

streptococcus pneumoniae
kidney bean

group B lancefield
alpha hemolytic

quellung reaction (methylene blue)
optochin test

Gram +
catalase -

Question 11

adult pneumonia

Answer 11

streptococcus pneumoniae
kidney bean

group B lancefield
alpha hemolytic

quellung reaction (methylene blue)
optochin test (sensitive)

Gram +
catalase -

Question 12

subacute bacterial endocarditis

Answer 12

streptococcus viridans
no group classification
optochin test (not sensitive)

Gram +
catalase -

Question 13

UTI & sepsis

Answer 13

enterococcus faecalis
group D streptococci
gamma hemolysis

Gram +
catalase -

Question 14

grapelike golden yellow colony

Answer 14

staphylococcus aureus

gram +
catalase +

Question 15

S. aureus: spreading factor

Answer 15

hyaluronidase

Question 16

S.aureus: lyses fibrin

Answer 16

staphylokinase

Question 17

gastroenteritis

Answer 17

staphylococcus aureus (enterotoxin)
food poisoning

gram +
catalase +

Question 18

toxic shock syndrome

Answer 18

staphylococcus aureus (TSS toxin)
high fever + low diastolic BP

gram +
catalase +

Question 19

scalded skin syndrome

Answer 19

staphylococcus aureus (exfoliation toxin)
loss of epidermis

gram +
catalase +

Question 20

acne

Answer 20

staphylococcus aureus (direct organ invastion)

gram +
catalase +

Question 21

acute bacterial endocarditis

Answer 21

staphylococcus aureus (direct organ invastion)
sudden onset

gram +
catalase +

Question 22

prosthetic heart valve endocarditis

Answer 22

staphylococcus epidermis
adheres to artificial materials in body

novobiocin sensitive
gram +
catalase +

Question 23

Staphylococcus differentiation: S.aureus

Answer 23

Colony: golden
coagulase: +
catalase: +
novobiocin: sensitive
hemolysison: +

Question 24

Staphylococcus differentiation: S. epidermidis

Answer 24

Colony: white-gray
catalase: +
coagulase: -
novobiocin: sensitive
hemolysison: -

Question 25

Staphylococcus differentiation: S. saprophyticus

Answer 25

Colony: white-gray catalase: + coagulase: - novobiocin: resistant hemolysison: -

Question 26

anthrax

Answer 26

bacillus anthracis cutaneous: tissue necrosis respiratory: wool sorter's disease GI: rare but fatal Medusa/bamboo Gram + spore forming rod

Question 27

only glutamate (AA) capsulated bacteria

Answer 27

bacillus anthracis medusa head colony (square/bamboo) 3 protein components in capsule: protective antigen edema factor lethal factor Gram + spore forming rod

Question 28

fried rice diarrhea

Answer 28

bacillus cereus found in starchy food Gram + spore forming rod

Question 29

Flaccid paralysis

Answer 29

clostridium botulinum botox (most potent neurotoxin) (-) ACh release Gram + spore forming rod

Question 30

floppy baby

Answer 30

aka infant botulinum clostridium botulinum from contaminated honey syrup Gram + spore forming rod

Question 31

spastic paralysis

Answer 31

clostridium tetani tennis rocket appearance tetanospasmin (-) GABA & glycine release Gram + spore forming rod

Question 32

Tetanus: Signs

Answer 32

trismus - lock jaw risus sardonicus - dog smile opisthothonus - arching of back

Question 33

gas gangrene

Answer 33

clostridium perfringens a-toxin (lecithinase) Gram + spore forming rod

Question 34

pigbel disease

Answer 34

aka enteritis necroticans clostridium perfringens b-toxin Gram + spore forming rod

Question 35

common cause of food poisoning

Answer 35

clostridium perfringens Gram + spore forming rod

Question 36

pseudomembranous colitis

Answer 36

clostridium difficile Gram + spore forming rod

Question 37

most common cause of superinfection

Answer 37

clostridium difficile Gram + spore forming rod

Question 38

most common cause of diarrhea in AIDs patients

Answer 38

clostridium difficile Gram + spore forming rod

Question 39

bull-neck diphtheria

Answer 39

corynebacterium diphtheriae loeffler's bacillus chinese palisades (-) elongation factor 2 club shaped rod Gram + non-spore forming rod

Question 40

only gram + with endotoxin

Answer 40

listeria monocytogenes tumbing "roll & fall" motility at 22C umbrella growth pattern catalase+ Gram + non-spore forming rod