Changes

** Is particularly seen in viral conditions of epithelial tissue.

** Is particularly seen in viral conditions of epithelial tissue.

* [[Oral Cavity - Cavity & Gingiva#Foot and Mouth disease|Foot and Mouth Disease]] is the best example.

* [[Oral Cavity - Cavity & Gingiva#Foot and Mouth disease|Foot and Mouth Disease]] is the best example.

** The virus attacks the stratum spinosum of the epithelium of the tongue and feet.  

the virus attacks the stratum spinosum of the epithelium of

*** Affected cells are balloon up with water containing the replicating virus.  

the tongue and feet. The affected cells are ballooned up

*** Cells swell until they burst.

with water containing the replicating virus. The cells swell

**** The fluid they contained in the cells then forms microvesicles (blisters) in this layer of the epithelium.

until they burst and the fluid they contain forms

***** May later burst, shedding vast quantities of the virus. W

microvesicles (blisters) in this layer of the epithelium

***** When it bursts, the edges of the erosion look ragged, but within weeks the germinal epithelium at the base of the erosion regenerates the epithelium, leaving no trace of a scar.

which may later burst, shedding vast quantities of the

virus. When it bursts, the edges of the erosion look

ragged, but within weeks the germinal epithelium at the

base of the erosion regenerates the epithelium, leaving no

trace of a scar.

====Vacuolar Degeneration====

====Vacuolar Degeneration====