DERMATOPHILIASIS {JIGGER) 221 1 



plumbi (3ii.), tincture of opium (3i.) diluted with 8 ounces of water, 

 or of dressing soaked in 0-5 iper [cent, of Iresorcin, may cause^a flight 

 improvement. 



Fig. 867. — Dermatitis Macrogyrata. 



5. Dermatites caused by the Presence of the Imago. 



At times the impregnated jfemale insect burrows into the skin 

 while the eggs mature. 



A good example of this is Dermatophilus penetrans Guerin, 1838. 



D3rmatophiliasis (Jigger). 

 Synonyms. — Nigua (Honduras), Chique (Salvador), Chica (Colum- 

 bia), Bicho, Tunga (Brazil), Pique (Argentine), Chique (French 

 Colonies) . 



Definition, — Dermatophiliasis is the invasion of the skin and 

 subcuta.neous tissue by the pregnant female jigger [Dermatophilus 

 penetrans) . 



Remarks. — The home of the jigger is in tropical America, from 

 23° N. to 28° S., but it and its wanderings over the world have been 

 sufficiently described on p. 862. At present it is found in South 

 America, West and East Africa, Madagascar, Uganda, India, and, it 

 is said, China. 



Pathology. — The pregnant female jigger pierces the skin obliquely 

 near the nails and between the toes, but it may occur in any part 

 of the foot, and even on the arms, scrotum, and face. All but the 

 last two segments are embedded in the skin. These last segments 

 plug the orifice and discharge the eggs. 



