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Flashcards in Micro "Most Commons" Deck (37)
1

Most common bugs that mimic appendicitis

Yersinia enterocolitica
Nontyphoidal Salmonella
Campylobacter jejuni

2

7 most common causes of bloody diarrhea

Campylobacter
Salmonella
Shigella
EHEC
EIEC
Yersinia enterocolitica
Entamoeba histolytica

3

6 most common causes of watery diarrhea

ETEC
Vibrio cholerae
C. difficile
C. perfringens
Protozoa
Viruses

4

Most common causes of pneumonia in neonates (< 4 weeks)

Group B strep
E. coli

5

Most common causes of pneumonia in children (4 weeks - 18 years)

Viruses (RSV)
Mycoplasma
Chlamydia trachomatis (infants-3 years)
C. pneumoniae (school aged children)
S. pneumoniae

6

Most common causes of pneumonia in adults (18-40 years)

Mycoplasma
C. pneumoniae
S. pneumoniae

7

Most common causes of pneumonia in adults (40-65 years)

S. pneumoniae
H. influenzae
Anaerobes
Viruses
Mycoplasma

8

Most common causes of pneumonia in elderly

S. pneumoniae
Influenza virus
Anaerobes
H. influenzae
Gram-negative rods

9

Most common causes of nosocomial pneumonia

Staph
Enteric gram-negative rods

10

Most common causes of pneumonia in immunocompromised

Staph
Enteric gram-negative rods
Fungi
Viruses
Pneumocystis jirovecii - with HIV

11

Most common causes of aspiration pneumonia

Anaerobes

12

Most common causes of pneumonia in alcoholics and IV drug users

S. pneumoniae
Klebsiella
Staph

13

Most common causes of pneumonia in cystic fibrosis

Pseudomonas
S. aureus
S. pneumoniae

14

Most common causes of postviral pneumonia

Staph
H. influenzae
S. pneumoniae

15

Most common causes of atypical pneumonia

Mycoplasma
Legionella
Chlamydia

16

Most common causes of meningitis in newborns (0-6 months)

Group B strep
E. coli
Listeria

17

Most common causes of meningitis in children (6 months-6 years)

S.pneumoniae
N.meningitidis
H. influenzae type B
Enteroviruses

18

Most common causes of meningitis in 6-60 year olds

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

19

Most common causes of meningitis in 60 year old +

S. pneumoniae
Gram negative rods
Listeria

20

Most common causes of viral meningitis

Enteroviruses (esp. coxsackievirus)
HSV-2 (HSV-1=encephalitis)
HIV
West Nile virus
VZV

21

Most common causes of meningitis in HIV patients

Cryptococcus
CMV
Toxoplasmosis (brain abscess)
JC virus (PML)

22

Most common causes of osteomyelitis given no other information

S. aureus

23

Most common causes of osteomyelitis in sexually active

N. gonorrhoeae (rare), septic arthritis more common

24

Most common causes of osteomyelitis in diabetics and IV drug users

Pseudomonas
Serratia

25

Most common causes of osteomyelitis in sickle cell

Salmonella

26

Most common causes of osteomyelitis in prosthetic replacement

S. aureus
S. epidermidis

27

Most common causes of osteomyelitis in vertebral disease

M. tuberculosis (Pott's disease)

28

Most common causes of osteomyelitis with cat and dog bites or scratches

Pasteurella multocida

29

Most common cause of UTI

E. coli

30

2nd most common cause of community acquired UTI in sexually active women

Staph saprophyticus

31

3rd leading cause of UTI

Klebsiella pneumoniae

32

Most common causes of PID

Chlamydia trachomatis
Neisseria gonorhoaea

33

Most common bacterial STD in the U.S.

Chlamydia trachomatis

34

Most common cause of rash in unimmunized children

Rubella: begins at head and moves down with postauricular lymphadenopathy

Measles: begins at head and moves down, rash preceded by cough, coryza, conjunctivitis, photophobia and Koplik spots

35

Most common cause of meningitis in unimmunized children

H. influenzae type B
Poliovirus

36

Most common causes of pharyngitis in unimmunized children

Corynebacterium diptheriae

37

Most common causes of epiglottis in unimmunized children

H. influenzae type B