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Flashcards in Staphylococcus aureus Deck (40)
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1

What are the two types of patients?

Normal Patient

Patient with compromising or predisposing factors

2

Patients with compromising or predisposing factors are due to these 5 things?

Surgery or trauma

Immunoincompetence or immunosuppression

Diabetic

Alcoholism or drug use

Pregnancy

3

What are the two modes of infection acquisition? (two ways you acquire infectious disease)

Community acquired

Hospital acquired

4

What are the three geographic distribution and/or "work" environments?
(places to acquire infections?)

Insect vectors/ climate

Farm & ranch

Construction Work

5

Is Staphylococcus aureus gram + or gram -?

Gram +
Cocci in clusters

6

What causes about 90% of invasive tissue infections?

Staphylococcus aureus

7

True/ False
Staphylococcus aureus pyogenic

True

8

What is folliculitis?
What microbe causes this?

Infection of the hair follicle

Staphylococcus aureus

9

What is a furnuncle? What microbe causes this?

Deep seated infections (subcutaneous tissue involved) in and around the hair follicle.

Staphylococcus aureus

10

What is cellulitis? What microbe causes this?

Similar to folliculitis/boils in skin or tissues but spreads beneath the skin.
Staphylococcus aureus

11

What is impetigo? What microbe causes this?

Superficial skin infection characterized by small "blisters"/pustules followed by a thin crust over the area

Staphylococcus aureus

12

Staphylococcus aureus is the etiologic agent of?

Invasive tissue infections
Food poisoning
Toxic Shock Syndrome
Scalded Skin Syndrome
Septicemia/bacteremia
Bone and joint infections
Pneumonia/Lower Respiratory & Lung Abscess infections

13

Staphylococcus aureus can cause this especially after surgery or trauma often due to external contamination?

Wound and internal tissue infections (abscess)

14

Staphylococcus aureus can cause this due to numerous invasive enzymes and toxins.

Tissue damage. Some invasive infections can be very severe.

15

Staphylococcus aureus food poisoning is due to ingestion of this?

pre-formed heat-stable enterotoxin. Its an enterotoxin that affects the intestinal tract (types A,B,C, etc SEB).

16

What are the commonly affected foods of Staphylococcus aureus that causes food poisoning?

Cooked or processed meat (especially ham), salads, and cream filled desserts.

17

What are the clinical symptoms of food poisoning caused by Staphylococcus aureus

Nausea
Vomiting
Abdominal cramps
Watery diarrhea

18

Food poisoning symptoms of Staphylococcus aureus start within how many hours and last to about how many hours?

Starts within 1-6 hours and lasts from a few hours to about 24 hours.

19

True or False
Staphylococcus aureus growth on food produces no change in flavor or odor.

True

20

Food Poisoning:

What are the conditions Staphylococcus aureus (certain strains) will produce enterotoxin?

When growing at 28C or higher for 2 to 4 hours.

21

Certain strains of Staphylococcus aureus produce Toxic Shock Syndrome Toxins (TSST). The TSST toxin probably causes?

Massive and unregulated stimulation of the immune system.

22

TSST produces what symptoms?

Acute illness with:
High fever
Diffuse rash
Hypotension
Skin desquamation

23

What is TSST infection normally associated with?

Use of highly absorbent tampons (about 75% of cases) or with focal or surgical wound infections in men or non-menstruating women.

24

In TSST, how does the tampon cause infection?

Absorption of fluids causes change of microbial growth environment resulting in change or host-microbe dynamics.

25

True or False
TSST test for toxins is usually performed in routine microbiology labs.

False

26

What does Scalded Skin Syndrome cause in children under 5?

Toxic Epidermal Necrolysis (TEN)

27

Strains of scalded skin syndrome produce what kind of toxins? and they are destructive to?

Exfoliatin Toxins

Destructive to epithelial cells

28

What are the symptoms of Toxic Epidermal Necrolysis in children under 5?

Initially a localized red rash, often following conjunctivitis or upper respiratory tract infection.

Followed by large flaccid bullae.

29

The bullae of scalded skin syndrome do what?

Rupture and sheets of epidermis peel off to reveal moist, red, "scalded" dermis.

30

True or False
Bacteria are recovered from the bullae and not from the initial infection.

False