Pathology
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Atlas of dermatopathology
Josef Feit, Hana Jedličková, Günter Burg, Luděk Matyska, Spasoje Radovanovic et al.
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+ Introduction
+ Literature
+ Support
+ Skin biopsy
+ Non-tumorous skin diseases
+ Skin tumors
+ Cysts of the skin and subcutis
+ Soft tissue lesions
+ Some lesions of the oral cavity
+ Dermatovenerology
+ Collection of histological slides by prof. Günter Burg
+ Collection of histological slides by prof. Werner Kempf
+ Collection of histological slides of dr. Ram Chandra Adhikari
Trombicula autumnalis, Harvest mite
Etiology

Eggs are laid in spring, larvae hatch after about two months, then wait in low vegetation. After attaching to (thin) skin of people or warm blooded animals they release digesting saliva and suck the digested tissue. They fall of after 4 days and finish their development cycle.

Clinical signs
  • larva attaches the skin, often near the follicle
  • small papules and pustules are formed, strong pruritus
  • excoriations are common
  • after stay in nature, especially in warm weather
Histology

Slight inflammation, necrosis of the tissue near the attachment.