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Bacte Lec (Lesson 2) > Composition Of Microbial Flora At Different Body Sites > Flashcards

Composition Of Microbial Flora At Different Body Sites Flashcards

1
Q

What’s the reason behind the low incidence infection of micriobial flora?

A

Becuase of the immune response of the body (immunocompetent)

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2
Q

When we say immunocompromised patients, we are what?

A

Easily get infections from microbial flora.

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3
Q

What are the mechanisms of the skin that inhibit the microbial flora to invade?

A

Fatty acids and lipid secretion
Excretion of lysozyme of Sweat glands
Desquamation of epithelium

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4
Q

Most microbial flora in skin found in ____.

A
  • Most superficial layers of cells
  • upper parts of the hair follicles
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5
Q

T or 9
99.9% of bacteria will be eliminated in the skin if we scrub or wash our body.

A

False- 90%

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6
Q

The composition of the flora in skin depends on the activity of the___.

A

sebaceous or sweat glands

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7
Q

Organisms concentrate the most in moist area like.

A

Perineum
Armpit/axillae
Groin

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8
Q

They are usually found in moist areas such as axillae or between toes.

A

Aerobic diptheroids

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9
Q

These microbial flora reside in hair follicles and colonize the sebaceous gland.

A

Staphylococcus epidermidis
Propionibacterium spp.

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10
Q

T or F
The presence of skin bacteria supports the growth of other pathogenic spp.

A

False - they inhibit the other pathogens.

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11
Q

Why do apocrine glands produce amine/foul odor?

A

Because the secretes subs. were metabolized by the bacteria, which causes bad odor.

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12
Q

T or F
Staphylococcus epidermidis can be inhibited through lipids and fatty acids.

A

False- this species is resistant

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13
Q

They are common microbial flora found in the skin except:
A. Staphylococcus spp.
B. Streptococcus spp.
C. Clostridium spp.
D. Candida spp.

A

B. Streptococcus spp.

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14
Q

What microbial flora dominates the mouth?

A

Streptococcus spp.

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15
Q

Where does the flora usually bind inside the mouth?
A. Tongue
B. Teeth surface
C. Buccal mucosa
D. Tonsils

A

B. Teeth surface
C. Buccal mucosa

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16
Q

T or F
Plaquein teeth contain 10^11 streptococci per gram

A

True

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17
Q

What is/are the results of plaque?

A

Results in low oxidation-reduction potential, which fermentation occurs and produce lactic acid that causes cavity.

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18
Q

Respiratory tract is divide into two parts.

A

Upper Respiratory tract
Lower Respiratory tract

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19
Q

Upoer Respiratory tract is composed of what?

A

mouth, nasopharynx, orapharynx, and larynx.

20
Q

The lower respiratory tract consists of what?

A

Trachea, bronchi, pulmonary parenchyma

21
Q

The organs that are protected by the action of ciliary epithelial

A

Trachea, bronchi ,lungs

22
Q

the upper respiratory tract is usually dominant by:

A

Viridans streptococci

23
Q

Viridans of strep. Found in respiratory tract.

A

Common:
Streptococcus mitis
Streptococcus mutans
Streptococcus milleri

Streptococcus sanguis
Moraxella catarrhalis
Neisseria spp.
Diptheroids

24
Q

Obligates anaerobes reside in ____ where an anaerobic environment support them to live.

A

Gingival crevices

25
Q

Example of opportunistic pathogen

A

S. Aureus

26
Q

What are the additional species of flora can be found in nasopharynx?

A

Haemophilus influenzae
Streptococcus pneumoniae
Neisseria meningitis

27
Q

T or F
Individual who are hospitalized for several days may become colonized in the upper RT by gram-positive bacteria.

A

False- gram negative like enterobacteriaceae

28
Q

The oropharynx usually contains a viridans group. what are they?

A

Strep. mitis
Strep. mutans
Strep. milleri
Strep. sanguis
Strep. salivarius

29
Q

Aside from the viridans group found in oropharynx, what are the others??

A

Diptheroids, Moraxella catarrhalis

30
Q

Comprises the esophagus, stomach, small intestine, and colon.

A

Gastrointestinal tract

31
Q

T or F
Microbial flora usually multiplies in the esophagus and stomach.

A

False

32
Q

What components protect the stomach?

A
  • Gastric juice, which has HCL with 1 pH
  • some acids and enzyme
33
Q

What microorganisms ca survive inside the stomach?

A
  • Spore forming bacteria
  • cysts of parasites
  • Helicobacter pylori
34
Q

T or F
Stomach totally kills all bacteria.

A

False- it only minimizes the microbial flora tha reach to intestine

35
Q

T or F
Obligate anaerobes make up 90% of microbial flora in large intestine.

A

True

36
Q

T or F
Small intestines contain few organisms came from the stomach.

A

False- it came from colon

37
Q

What organisms is/are usually present in the large intestine?
A. Gram negative bacilli
B. Gram negative cocci
C. Yeast
D. P. aeruginosa

A

B,C,D

38
Q

The gastrointestinal tract population may be altered by ____.

A

Antibiotics

39
Q

T or F
When a particular population of microorganisms eradicated antibiotics, other members of indigenous flora are able to proliferate.

A

True

40
Q

The alteration of GIT can cause severe
A. Necrotizing enterocolitis(C. difficile)
B. Diarrhea (C. albicans, S. aureus)
C. Both
D. None of the above

A

C.

41
Q

All are common microorganisms found in GIT except what?
A. Staphylococcus spp.
B. Clostridium spp.
C. Fusobacterium spp.
D. Eubacterium spp.

A

All aswers are correct

42
Q

T or F
Kidney,bladder, and fallopian tubes are normally free of microorganisms.

A

True

43
Q

Microbial flora found in the urethra usually came from what?

A

Skin

44
Q

T or F
The composition of the vaginal flora is consistent with hormonal changes and age.

A

True

45
Q

Before puberty and postmenopausal, the women vaginal consist of what microorganisms?

A

Yeast
Gram negative bacilli
Gram points cocci

46
Q

Which statement is/are true about microbial flora during pregnancy?
A. The pregnant woman has high estrogen promotes to glycogen production in vaginal epithelial cells.
B. High-level glycogen can be prone in vaginal infection.
C. Lactobacilli metabolized the glycogen to maintain the pH low.
D. Low pH encourages the production of aaerobic gram - bacilli, gram + cocci, lactobacilli

A

All answers are correct

47
Q

All are common microorganisms foun in Genitourinary tract except:
A. Lactobacillus spp.
B. Clostridium spp.
C. Candida albicans
D. Enterobacteriaceae

A

C and D

Bacte Lec (Lesson 2) (6 decks)

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