Difference between revisions of "Parasitic skin infections - Pathology"

Local reaction depends on host hypersensitivity and tick's secretions
Grossly:
- Focal erosions, erythema, crusted ulcers, sometimes alopecia and nodules
Microscopically:
- Epidermal and dermal necrosis
- Perivascular of diffuse inflammation and necrotic margins
- Eosinophils, macrophages and lymphocytes in exudate
- May form granulomas containing collagenous fibres and lymphoid follicles within dermis

@@ Line 56: / Line 56: @@
 ===[[Trombiculidiasis]]===
-==Protozoa==
+==[[Protozoal Dermatosis]]==
-*Cutaneous infection may become a part of systemic infection
-*Mostly caused by [[Protozoa|''Leishmania'']]
-*Transmitted by [[Insecta|sandflies]]
-*Occurs in dogs, cats and rodents (also humans)
-*Grossly in dog:
-**Generalised alopecia
-**Silvery white scales
-**Nodules and ulcers if more severe
-**Mainly on muzzle, ears and eyes where flies feed
-*Microscopically:
-**[[Skin Glossary - Pathology|Hyperkeratosis, parakeratosis, crusts]]
-**Granulomatous nodules in dermis
-**Macrophages, some lymphocytes and plasma cells - periadnexal pattern, may affect sebaceous glands
-**Organisms may be found extra or intracellularly
 ==Ticks==

Revision as of 10:45, 30 June 2010