DRACUNCULUS MEDINENSIS 



389 



weeks later the larvae will become mature in Cyclops, so that infection 

 of Cyclops is taking place in July or August, and from then to June 

 about ten months elapse, giving the period of development in man. 



Pathology. The initial induration is accompanied by itching. 

 Urticarial eruptions are described in Dahomey and Mauretani? 

 accompanied by fever, rigors, blood-shot conjunctiva, and prostration 

 resembling fungus poisoning. Symptoms last for one to two days, 

 later the worms appear on the surface. 



If the worm is ruptured in an attempt to extract it, disastrous 

 results may occur through the escape of the larvce into the tissues : 



FIG. 280. Cyclops virescens, ?. 8, Female, ventral view, x 120; 9, anterior antennae 

 x 240; 10, urosome and last thoracic segment, x 240; n, foot of first pair, X 320; 

 12, 15, 16, foot of second, third and fourth pairs, x 240; 14, foot of fifth pair, x 440; 13, 

 last thoracic segment and first segment of urosome of male, x 240. 



fever, inflammation, abscess, sloughing, ankylosis, even death from 

 sepsis. Eosinophilia is often marked, n to 13 or even 50 per cent. 



Extraction. (i) The native method consists in rolling the worm 

 round a stick ; i in. to 2 in. are extracted each day, the process 

 taking about a fortnight ; (2) Emily used injections of i in 1,000 

 sublimate into the swelling or into the worm itself fixed by a ligature. 



