c5

Question 1

is the study of the relationships between microorganisms and their environment.

Answer 1

Microbial Ecology

Question 2

are organisms that are relatively of fixed types and are regularly found in a given area of the body at a given age

Answer 2

Resident flora

Question 2

are those that inhabit the skin and mucous membrane temporarily for hours, days, or weeks and are derived from the environment.

Answer 2

Transient flora

Question 3

is the part of the human body that is in constant contact with the environment, making it the most exposed to microorganisms.

Answer 3

Skin

Question 4

There are certain factors that eliminate non-resident flora from the skin, namely:

Answer 4

(1) lysozyme in the skin;
(2) acidic pH of the skin due to sweat;
(3) free fatty acids in sebaceous secretions; and
(4) the constant sloughing off of the skin.

Question 5

This is a major skin inhabitant, comprising approximately 90% of resident aerobic flora.

Answer 5

Staphylococcus epidermidis

Question 6

This is most commonly found in nose and perineum; in the nose, number varies with age (greater in newborns than in adults).

Answer 6

Staphylococcus aureus

Question 7

are most common in areas rich in sebaceous glands.

Answer 7

Anaerobic diphtheroids (Propionibacterium acnes)

Question 8

Gram-negative Bacilli (Enterobacter, Klebsiella, Escherichia coli, and Proteus spp.) These are seen in moist intertriginous areas such as toe

Answer 8

toe webs and axilla.