Natural defense mechanisms against infection
1. Skin: intact multilayered surface
shedding of outer layer of skin cells
ssebum
2. Mouth: intact multilayered mucosa
saliva
3. Eye: Tearing and blinking
4. Respiratory Tract: Cilia lining the upper airway coated by mucus
Macrophages
5. Urinary Tract: Flushing action of the urine floor intact
multilayered epithelium
6. Gastrointestinal tract: Acidity of gastric secretions rapid
peristalsis in small intestine
7. Vagina: At puberty normal flora causing vaginal secretions to achieve and low ph
8. Intact multilayered surface (first line of defense): skin a- provides
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, barrier to microorganisms and antibacterial
activity- cuts, abraisions, puncture wounds , areas of maceration
9. Shedding of outer layer of the skin cells: skin a- Removes
organisms that adhere to outer layers of the skin
f- failure to bathe regularly, improper handwashing techniques
10. sebum: (skin)
a- contains fatty acids that kill some bacteria
f- excessive bathing
11. intact multilayered mucosa: (mouth) (a-
Provides mechanical barrier to organisms
f- lacerations, trauma , extracted teeth
12. saliva: (mouth)
a- washes away particles containing microorganisms and contains microbial inhibitors ex lysozyme
f- poor oral hygiene, dehydration
13. Tearing and blinking: (eye)
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1. Skin: intact multilayered surface
shedding of outer layer of skin cells
ssebum
2. Mouth: intact multilayered mucosa
saliva
3. Eye: Tearing and blinking
4. Respiratory Tract: Cilia lining the upper airway coated by mucus
Macrophages
5. Urinary Tract: Flushing action of the urine floor intact
multilayered epithelium
6. Gastrointestinal tract: Acidity of gastric secretions rapid
peristalsis in small intestine
7. Vagina: At puberty normal flora causing vaginal secretions to achieve and low ph
8. Intact multilayered surface (first line of defense): skin a- provides
1/
7
, barrier to microorganisms and antibacterial
activity- cuts, abraisions, puncture wounds , areas of maceration
9. Shedding of outer layer of the skin cells: skin a- Removes
organisms that adhere to outer layers of the skin
f- failure to bathe regularly, improper handwashing techniques
10. sebum: (skin)
a- contains fatty acids that kill some bacteria
f- excessive bathing
11. intact multilayered mucosa: (mouth) (a-
Provides mechanical barrier to organisms
f- lacerations, trauma , extracted teeth
12. saliva: (mouth)
a- washes away particles containing microorganisms and contains microbial inhibitors ex lysozyme
f- poor oral hygiene, dehydration
13. Tearing and blinking: (eye)
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