CHAPTER XCVI 



THE DERMATOZOIASES 



Classification — Hexapode derma tites — Creeping eruption — Circinate creeping 

 eruption — Dermatitis macrogyrata — Chilopode derma tites — Acarine der- 

 matites — Copra itch — Grain itch — Scabies: — Nematode dermatites — 

 Cestode dermatites — References. 



CLASSIFICATION. 



The term ' dermatozoiasis/ in the widest sense of the word, means 

 any skin disease of animal origin, but it is usually restricted to 

 indicate those skin lesions which are caused by metazoan parasites. 

 Used in this restricted sense, dermatozoiasis includes: — 



I. Hexapode dermatites. 



11. Chilopode dermatites. 



III. Acarine dermatites. 



IV. Nematode dermatites. 

 V. Cestode dermatites. 



I. HEXAPODE DERMATITES. 



The Hexapode Dermatites include the lesions of the skin caused 

 by either the bites, the stings, or the presence of the larvae or the 

 pregnant female of various species of the Hexapoda. 



These hexapode dermatites may be divided into four classes: — 



1. Dermatites caused by bites of the adult. 



2. Dermatites caused by blistering fluids excreted by the 



adult. 



3. Dermatites caused by stings of the adult. 



4. Dermatites caused by the presence and bites of the larvae. 



5. Dermatites caused by the presence of the imago. 



Dermatites caused by Bites of the Adult. 



These lesions are most commonly due to bites of species of the 

 families Pediculidae (p. 753) ; Clinocoridae (p. 762) ; Anthocoridae 

 (p. 766) ; Reduviidae (p. 767) ; Aradidae (p. 770) ; CuHcidae (p. 774) ; 

 Psychodidae (p. 806) ; Simuliidae (p. 810), Tabanidae (p. 817) ; 

 Muscidae (p. 831), and by species of the orders Siphonaptera (p. 837) 

 and Hymenoptera in which comes the family Formicidae, or ants 

 (p. 222). 



2200 



