Medical Micro Final

Question 1

acid fast stain

Answer 1

m. tuberculosis

Question 2

HIV pt. mycobacteria

Answer 2

m. avium complex

Question 3

pharyngitis

Answer 3

strep. pyogenes (GAS)

Question 4

tx for GAS

Answer 4

penicillin

Question 5

invasive disease of newborn; causes meningitis

Answer 5

strep. agalactiae (GBS)

* screen pregnant women

Question 6

strep. viridans pathology

Answer 6

endocarditis

Question 7

gram stain shows encapsulation; bloody sputum

what is the organism?

Answer 7

strep. pneumonia

Question 8

enterococcus is intrinsically resistant to what abx?

Answer 8

cephalosporins

Question 9

how should you treat enterococcus?

Answer 9

synergistically - cell wall inhibitor and aminoglycoside

*both must be susceptible

Question 10

coag. positive - ID the organism

Answer 10

staph. aureus

Question 11

what abx is a MRSA organism resistant to?

Answer 11

oxacillin, nafcillin

Question 12

forms biofilms, common on prosthetics/endocarditis

Answer 12

staph. epidermidis

Question 13

list two organisms that are coag. negative

Answer 13

staph. epidermidis

staph. saprophyticus

Question 14

staph. saprophyticus will most likely cause this infection…

Answer 14

UTI

Question 15

gram positive cocci (list 3)

Answer 15

strep
staph
enterococcus (NF GI)

Question 16

spores; acquired via food poisoning

Answer 16

bacillus cereus

Question 17

spores; acquired via inhalation

Answer 17

bacillus anthracis

Question 18

gram stain - clubs palisading

Answer 18

corynebacterium

Question 19

corynebacterium diphtheriae pathology

Answer 19

gray exudates - cutaneous or lungs

Question 20

corynebacterium jeikeium pathology

Answer 20

septicemia with catheters

Question 21

causes meningitis in neonates, elderly, and immunocompromised pts

Answer 21

listeria monocytogenes

Question 22

gram positive rod/bacilli (list 4)

Answer 22

bacillus
corynebacterium
listeria monocytogenes
clostridium (anaerobic)

Question 23

fastidious and always a pathogen; plate at bedside

Answer 23

neisseria

Question 24

causes purulent discharge; can affect joints in young adults

Answer 24

neisseria gonorrhea

*only do a gram stain in males

Question 25

causes meningitis, ppl can be nasopharyngeal carriers

Answer 25

neisseria meningitis

Question 26

OM etiologic organism

Answer 26

moraxella catarrhalis

Question 27

gram negative diplococci (list two)

Answer 27

neisseria | moraxella catarrhalis

Question 28

gram stain - encapsulation; causes meningitis and OM

Answer 28

haemophilus influenzae | *culture on chocolate agar

Question 29

What two organisms show encapsulation on gram stain?

Answer 29

strep. pneumonia | haemophilus influenzae

Question 30

What specimen should you collect when pt has whooping cough?

Answer 30

nasopharyngeal specimen

Question 31

What organism causes whooping cough?

Answer 31

bordetella pertussis

Question 32

causes pontiac fever and legionnaires pneumonia

Answer 32

legionella species

Question 33

What agar should you use to culture legionella?

Answer 33

charcoal agar

Question 34

What specimen should you collect if you suspect legionella?

Answer 34

BAL

Question 35

gram negative coccobacilli (list 3)

Answer 35

haemophilus influenzae bordetella pertussis legionella species

Question 36

forms spores, causes muscle paralysis

Answer 36

clostridium botulinum

Question 37

honey and home canning; floppy baby

Answer 37

clostridium botulinum

Question 38

causes tetanus

Answer 38

clostridium tetani

Question 39

causes pseudomembranous colitis

Answer 39

clostridium difficile

Question 40

gram stain shows large rectangular rods with lack of inflammatory cells; pt has watery diarrhea and NO fever; what organism do you suspect?

Answer 40

clostridium perfringens

Question 41

anaerobic organisms (list 2)

Answer 41

clostridium | bacteroides

Question 42

organisms that form spores (list 2)

Answer 42

clostridium | bacillus

Question 43

enterobacteriaceae as a group are glucose (fermenting or non?) and oxidase (pos or neg?)

Answer 43

glucose fermenting | oxidase negative

Question 44

NLF GNR

Answer 44

proteus serratia marcescens morganella

Question 45

LF GNR

Answer 45

e.coli citrobacter klebsiella enterobacter

Question 46

``` #1 cause of UTI can cause meningitis in neonates ```

Answer 46

e. coli

Question 47

sputum described as currant jelly; mucoid colonies on culture

Answer 47

klebsiella

Question 48

opportunistic pathogens that can cause UTIs and bacteremia (list 2)

Answer 48

citrobacter | enterobacter

Question 49

organism is a strong urea hydrolyzer; | alkaline pH; renal calculi

Answer 49

proteus

Question 50

watery/bloody diarrhea; can cause HUS

Answer 50

e.coli 0157:H7

Question 51

stool shows WBCs and mucus

Answer 51

shigella

Question 52

stool negative for WBCs; culture has a black precipitate

Answer 52

salmonella (H2S+)

Question 53

when pt has a fever and travel history...

Answer 53

salmonella typhi | *can cause enteric fever or typhoid fever

Question 54

etiologic agent for blood transfusion bacteremia

Answer 54

yersinia entercolitica

Question 55

causes bubonic and pneumonic plague

Answer 55

yersinia pestis

Question 56

what agar differentiates lactose fermentation?

Answer 56

MaConkey agar

Question 57

what organism do you suspect if a colony is blue/green on hektoen enteric agar?

Answer 57

shigella

Question 58

has a green pigment and grape smell

Answer 58

pseudomonas aeruginosa

Question 59

NLF GNR oxidase positive

Answer 59

pseudomonas aeruginosa

Question 60

gram stain shows "plump pairs" | organism is NF of skin and vaginal tract

Answer 60

acinetobacter

Question 61

wound infections in Iraq

Answer 61

acinetobacter baumanii

Question 62

GNR with ammonia odor

Answer 62

stenotrophomonas maltophilia

Question 63

NLF GNR oxidase negative (list 2)

Answer 63

acinetobacter | stenotrophomonas

Question 64

most commonly isolated anaerobe; infected wounds, abscess, sepsis

Answer 64

bacteroides fragilis

Question 65

GNR and anaerobic

Answer 65

bacteroides fragilis

Question 66

budding yeast with pseudohyphae

Answer 66

candida albicans

Question 67

budding yeast with polysaccharide capsule

Answer 67

crytococcus neoformans

Question 68

dichotomous branching seen on gomori methenamine silver stain

Answer 68

aspergillus sp.