7.1 Infections on surfaces

Question 1

What viruses can be found naturally on the skin?

Answer 1

Papilloma virus

Herpes simplex

Question 2

Give an example of a Gram positive bacteria found on the skin?

Answer 2

Staphylococcus aureus

Question 3

Give an example of Gram negative bacteria found on the skin

Answer 3

Enterobacteriaceae

Question 4

What is the main bacteria present in the eye?

Answer 4

Coagulase negative staphlococci

Question 5

What is the main bacteria found in the nostril?

Answer 5

S. aureus

Question 6

What is the main bacteria found in the stomach?

Answer 6

Helicobacter pylori

Question 7

What is the main bacteria found in the urethra?

Answer 7

Enterobacteriaceae

Question 8

What is the main bacteria found in the vagina?

Answer 8

Lactobacilli

Question 9

What is a microbiota?

Answer 9

Microorganisms carried on the skin and mucosal surfaces which are harmless or beneficial.

Question 10

Give 3 examples of external surface infections

Answer 10

UTIs
Gastroenteritis
Conjunctivitis

Question 11

Give three examples of internal surface infections

Answer 11

Endocarditis
Septic arthritis
Empyema

Question 12

Give three prostetic surfaces which can carry infections

Answer 12

Intravascular lines
Prosthetic joints
Cardiac valves

Question 13

What is the bacterial cause of most prostheic joint infections?

Answer 13

S. aureus

Question 14

How to pathogens adhere to surfaces?

Answer 14

Pilli or fimbriae

Question 15

What is a biofilm?

Answer 15

A 3D matrix of bacteria which can cover a surface

Question 16

Why are biofilms dangerous to humans?

Answer 16

Antibacterials may struggle to penetrate biofilms to remove the bacteria.
The bacteria also have a lower metabolic rate so the medications will take longer to work.

Question 17

How can surface infections be treated?

Answer 17

Antibacterials
Remove prosthetic material
Surgery to remove affected tissue