FA - Micro - Systems (2016) Flashcards Preview

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Flashcards in FA - Micro - Systems (2016) Deck (25):
1

Bugs affecting unvaccinated children - Meningitis:

1. H.influenza type B ==> Microbe colonizes nasopharynx.
2. Poliovirus ==> Can also lead to myalgia + Paralysis.

2

Bugs affecting unvaccinated children - Respiratory - Epiglottitis:

1. Fever with dysphagia.
2. Drooling.
3. Difficulty breathing due to edematous "cherry-red" epiglottis.
4. "THUMBPRINT SIGN" on X-RAY.

3

Epiglottitis is caused by ...?

H.influenza type B (also capable of causing epiglottitis in FULLY IMMUNIZED children).

4

Bugs affecting unvaccinated children - Pharyngitis:

Grayish oropharyngeal exudate ==> Pseudomembranes may OBSTRUCT airway.
+ PAINFUL throat.

5

Pharyngitis is caused by ...?

C.diphtheriae ==> Elaborates toxin that causes NECROSIS in:
1. Pharynx.
2. Cardiac.
3. CNS tissue.

6

Nosocomial infections - 2 MCC:

1. E.coli ==> UTI.
2. S.aureus ==> Wound infection.

7

Nosocomial infections - Risk factor - Antibiotic use:

C.difficile ==> Watery diarrhea + Leukocytosis.

8

Nosocomial infections - Aspiration (2o to altered mental status, old age):

1. Polymicrobial.
2. Gram(-).
3. Often anaerobes.

9

Nosocomial infections - Aspiration - Unique signs/symptoms:

Right LOWER lobe OR right UPPER/MIDDLE lobe (patient recumbent).
==> PURULENT MALODOROUS SPUTUM.

10

Nosocomial infections - Decubitus ulcers, surgical wounds, drains - Pathogen:

1. S.aureus (incl. MRSA).
2. Gram(-) ANAEROBES ==> Bacteroides + Prevotella + Fusobacterium.

11

Nosocomial infections - Intravascular catheters - Pathogen:

1. S.aureus (incl. MRSA).
2. S.epidermidis (long term).
3. Enterobacter.

12

Nosocomial infections - Intravascular catheters - Unique signs/symptoms:

1. Erythema.
2. Induration.
3. Tenderness.
4. Drainage from access sites.

13

Nosocomial infections - Mechanical ventilation, endotracheal entubation - Pathogen:

LATE ONSET ==>
1. P.aeruginosa.
2. Klebsiella.
3. Acinetobacter.
4. S.aureus.

14

Nosocomial infections - Mechanical ventilation, endotracheal intubation - Unique signs/symptoms:

1. Nea infiltrate on CXR.
2. Incr. sputum producton.
3. Sweet odor ==> Pseudomonas.

15

Nosocomial infections - Renal dialysis unit:

HBV.

16

Nosocomial infections - Urinary catheterization - Pathogen:

1. E.coli.
2. Klebsiella.
3. Proteus spp.

17

Nosocomial infections - Water aerosols - Pathogen:

Legionella.

18

Nosocomial infections - Water aerosols - Unique signs/symptoms:

1. Signs of pneumonia.
2. GI symptoms (nausea, vomiting).
3. Neurologic abnormalities.

19

Infections causing brain abscess - MC:

1. Viridans streptococci.
2. S.aureus.

20

Infections causing brain abscess - If dental infection or extraction PRECEDES abscess, ...?

ORAL ANAEROBES COMMONLY INVOLVED.

21

Infections causing brain abscess - Multiple abscesses are usually from ...?

BACTEREMIA.

22

Infections causing brain abscess - Single lesions from contiguous sites:

1. Otitis media + Mastoiditis ==> Temporal lobe + Cerebellum.
2. Sinusitis OR dental infection ==> Frontal lobe.

23

Infections causing brain abscess - Reactivation in AIDS?

TOXOPLASMA.

24

Bugs causing food poisoning - C.botulinum:

TOXINS ==> Improperly canned foods.
SPORES ==> Raw honey.

25

Bugs affecting unvaccinated children - Dermatologic - Rash:

1. RUBELLA ==> Beginning at HEAD and moving DOWN with POST-AURICULAR lymphadenopathy.
2. MEASLES ==> Beginning at HEAD and moving down; rash PRECEDED by cough, coryza, conjunctivitis, and Koplik spots on buccal mucosa.