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pathophysiology of acute upper respiratory infection

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pathophysiology of acute upper respiratory infection Powered By Docstoc
					PATHOPHYSIOLOGY
Bacteria and Viruses

Direct hand to hand contact

Droplet

Enters tothe nose by inhaling

Immune defenses

Hair lining filters and trap some pathogens

Potential invaders

Traps in upper respiratory tract which coats by mucus

Junction of the posterior nose to pharynx

Impinge on the back of the throat

Transport pathogens up to the pharynx

Inflammatory response to immune system

Swelling
A

Erythema
B

Increase mucus secretion

fever
E

C

D

C A B

D

cough

colds

E

Adenoids and tonsils contain immune cell that respond to pathogens

Humoral immunity and cellular immunity acts to reduce infections throughout the entire respiratory tract

Suboptimal humoral and phagocytic immune system Pathogens resist destruction by a variety of mechanism

Production of toxins proteases

Initial nasopharyngeal infection may spread to adjacent stuvtures

sinusitis

rhinitis

laryngitis

pharyngitis


				
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posted:1/27/2010
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