| Line 1: |
Line 1: |
| | *"True ulcer" occurs when connective tissue under epithelium is exposed i.e. stratum germinativum is breached and then lesion takes much longer to heal. | | *"True ulcer" occurs when connective tissue under epithelium is exposed i.e. stratum germinativum is breached and then lesion takes much longer to heal. |
| | ===[[Bovine Virus Diarrhoea Virus]]=== | | ===[[Bovine Virus Diarrhoea Virus]]=== |
| − | *'''Mucosal Disease''': erosive condition produces small multiple, cleanly punched out lesion in mouth
| |
| − | *[[Neutrophils - WikiBlood|Neutrophils]] invade the ulcer and if bacterial colonisation occurs, further excavation follows. Either:
| |
| − | ::#This lesion develops a granular base and becomes diphtheritic.
| |
| − | ::#If bacterial colonisation does not take place, healing occurs within fourteen days.
| |
| − | *Seen in most parts of mouth (or maybe on muzzle) e.g. dental pad, [[Cheeks - Anatomy & Physiology|cheeks]], sides of [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]]
| |
| − | *Lesions extend throughout gut with particularly big ulcers in small intestine over [[Peyer's Patches - Anatomy & Physiology|Peyers patches]]. Necrosis occurs in lymph nodes and [[Spleen - Anatomy & Physiology|spleen]]
| |
| | | | |
| − | ====<span id="BVDHistology">Histology</span>====
| |
| − | *No vesicular stage, prickle cells die off from surface resulting in layer of necrotic debris over epithelial layer
| |
| − | *Infection penetrates inward through stratum germinativum.
| |
| − | *Epithelium does not recover as animal does not recover
| |
| | | | |
| | ===[[Malignant Catarrhal Fever Virus]]=== | | ===[[Malignant Catarrhal Fever Virus]]=== |
| | [[Category:Oral Cavity and Gingiva - Pathology]] | | [[Category:Oral Cavity and Gingiva - Pathology]] |