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Flashcards in micro systems Deck (74):
1

normal skin flora

S. epidermidis

2

normal nasal flora

S. epidermidis
colonized by S. aureus

3

normal Oropharynx flora

viridans

4

dental plaques

S. mutans

5

normal flora of colon

B. fragilis > E. coli

6

normal flora of vagina

Lactobacillus, colonized by E. coli and group B strep

7

food poisoning bugs

B. cereus
C. botulinum
C. perfringens
EHEC
Salmonella
S. aurues
Vibrio

8

B. cereus

reheated rice

9

C. perfringens

reheated meat

10

salmonella

poultry, meat, eggs

11

S. aureus

meats, mayonnaise, custard
toxin

12

vibrio

seafood

13

bloody diarrhea

Campylobacter
E. histolytica
EHEC
EIEC
Salmonella
Shigella
Yersinia enterolitica

14

campylobacter

comma shaped
growth at 42 -> cold salads, deli meat

15

E. histolytica

protozoan
amebic dysentery
liver abscess

16

EHEC

HUS
shiga like toxin

17

Slamonella

lactose neg
flagellar motility

18

shigella

lactose neg
very low ID50
produces shiga toxin
bacillary dysentery

19

Yersinia enterolytica

day care outbreaks
pseudoappendicitis

20

watery diarrhea

C. difficile
C. perfringens
ETEC
protozoa
V. cholerae
viruses (roto, noro, adeno)

21

pneumonia

group B strep
E. coli

22

pneumonia 4wk-18yr

Runts May Cough Chunky Sputum
RSV
mycoplasma
C. trachomatis (infants-3)
C. pnemoniae (school age)
S. pneumoniae

23

pneumonia 18-40

mycoplasma
C. pneumoniae
S. penumoniae

24

pneumonia 40-65

S. pneumonia
H. influenza
Anaerobes
viruses
mycoplasma

25

pneumonia 65+

S. pneumoniae
Influenza virus
anaerobes
H. influenza
gram neg rods

26

pneumonia in alcoholics/IV drug users

S. pneumonia
Klebsiella
S. aureus

27

Aspiration neumonia

anaerobes
Peptostreptococcus
fusobacterium
prevoella
bacteroides

28

atypical pneumonias

Mycoplasma
legionella
chlamydia

29

CF pneumonia

pesudomonas
S. aureus
S. pneumoniae

30

immunocompromised pneumonia

S. aureus
enteric gram neg rods
fungi
viruses
P. jirovecii

31

nosocomial pneumonia

S. aureus
psudomonas
enteric gram neg rods

32

post viral pneumonia

S. aureus
H. influenxa
S. pneumonia

33

meningitis 0-6mo

group B strep
E. coli
listeria

34

meningitis 6mo-6yr

S. pneumonia
N. meningitidis
H. influenza type B
Enteroviruses

35

meningitis 6-60yr

S. pneumoniae
N. meningitis (#1 in teens)
Enteroviruses
HSV

36

meningitis 60+

S. penumoniae
gram neg rods
listeria

37

Tx meningitis

ceftriaxone and vanco empirically add ampicillin if listeria suspected

38

what are the MCC of brain abscess

Virdans and S. aureus

39

osteomyelitis assumed causative agent

S. aureus

40

ostomyelitis if sexually active

N. gonorrhoeae, rare

41

osteomyelitis if sickle cell

salmonella and S. aureus

42

osteomyelitis if prosthetic joint

S. aureus and S. epidermidis

43

osteomyelitis if vertebrae involved

S. aureus, TB

44

osteomyelitis if cat/dog bite

pasteurella multocida

45

osteomyelitis if IV drug user

pseudomonas
candidia
S. aureus

46

top 3 causes of UTI

E. coli
S. saprophyticus
klebsiella

47

other causes of UTI

serratia (red pigment)
enterococus (often nosocomial and drug resistant)
proteus (motility -> swarming on agar, produces urease -> struvite stones)
psudomonas (blue/green, fruity odor)

48

bacterial vaginosis

gardenella
no inflammation
fishy odor
clue cells
pH >4.5
Tx with metronidazole

49

trichomoniasis vaginosis

inflammation-> strawberry cervix
frothy, foul smelling discharge
motile trichomonads
pH >4.5
Tx metronidazole and Tx sex partners

50

TORCHES

T-toxoplasma gondii
O- other
R-rubella
C-CMV
H-HIV/HSV2
Syphilis

51

toxoplasma gondii

cat feces or undercooked meat
mom asymptomatic
baby triad: chorioretinits, hydrocephalus, intracranial calcifications
+/- blueberry muffin rash

52

other

Group B strep, listeria, E. coli -> meningitis
Parvovirus B19 -> hydrops fetalis

53

Rubella

spread via respiratory droplets
mom: rash, lymphadeopathy, arthritis
baby triad: PDA, cataracts, deafness
+/- blueberry muffin rash

54

CMV

sexual contact, organ transplants
mom asymptomatic or mono
baby hearing loss, seizures, blueberry muffin rash, periventricular calcifications

55

HIV

sex contact, needlestick
mom- depends on CD4 count
baby: recurrent infections, chronic diarrhea

56

HSV2

skin or mucous membrane contact
mom usually asymptomatic, or lesions
baby encephalitis, herpetic lesions

57

syphilis

sexual contact
mom- normal syphili
baby- stillbirth, hydrops fetalis, notched teeth, saddle node, short maxilla, saber shins, CNVIII deafness

58

asplenic pt

encapsulated microbes especially SHiN:
S. pneumonia >> H. influenza > N. meningitidis

59

Brr rods in oral infection and sulfur granules

Actinomyces

60

Chronic granulomatous disease

Cat + microbes especially S. aureus

61

dog/cat bite

Pasturella multocida

62

facial nerve palsy

burrelia burgdorferi

63

funga infection in HIV

mucor or rhixophus

64

health care providor

HBV

65

neutropenic pt

candida
aspergillus

66

organ transplant recipient

CMV

67

PAS +

T. whipplei (whipple disease)

68

pediatric infection

H. influenza

69

Pneumonia in cystic fibrosis or burn victims

psudomonas

70

pus, empyema, abscess

S. aureus

71

rash on hands and feet

Coxsackie A
treponema palldium
rickettsia rickettsii

72

sepsis/menigitis new born

group B strep

73

surgical wound

S. aurues

74

traumatic open wound

C. perfringesn