Lecture 1.1.5 Diagnosing Bacterial Infections: Wound

What are the 3 primary sites of organisms on the skin?

Dry

Moist

Sebaceous

Which of the following organisms is located on dry, moist, and sebaceous skin?

A) S. hominis

B) C. acnes

C) S. mitis

D) S. warneri

B) C. acnes

Which of the following skin types is S. epidermis located?

A) Dry

B) Moist

C) Sebaceous

C) Sebaceous

True/False:

When obtaining a sample from a wound, contamination with skin flora is common.

True

True/False:

Swab is the most common and most recommended form of capturing an organism from the skin.

False

* Most common but not recommended due to risk of contamination

Which of the following involves spreading infection?

A) Cellulitis

B) Abscess

A) Cellulitis

Which of the following involves pus or liquid inside a wound?

A) Cellulitis

B) Abscess

B) Abscess

From which of the following wounds could a sample be obtained via needle aspiration?

A) Cellulitis

B) Abscess

A) Cellulitis

* Area injected with a small volume of normal saline and aspirated, then taken to lab for testing

True/False:

Using needle aspiration to obtain a sample from a cellulitis wound bring high yield.

False

* Low yield (only 10% of organisms identified)

From which of the following wounds could a sample be obtained via incision and drainage (I&D)?

A) Cellulitis

B) Abscess

B) Abscess

* This is the most common strategy for abscesses

* Pus is aspirated from the wound then taken to the lab for testing

True/False:

It is recommended that a swab be taken from the pus of an abscess, but only after incision and drainage is complete.

False

* Swab is NOT recommended

From which of the following is synovial fluid withdrawn?

A) Bone biopsy

B) Joint biopsy

B) Joint biopsy

List the following steps of open wound infection progression in the correct order.

- Skin breakage

- Colonization

- Progression of infection

- Contamination

- Skin breakage

- Contamination

- Colonization

- Progression of infection

Which of the following wounds undergo healing and regain of structural integrity of the tissue?

A) Acute wounds

B) Chronic wounds

A) Acute wounds

Which of the following is considered the gold standard method for culturing?

A) Swabbing

B) Tissue biopsy

C) Needle aspiration

D) All of the above

B) Tissue biopsy