SUPPLEMENT 7 I 5 



Treatment consists in the removal of the parasites from the skin 

 with a needle or a small sharp knife and the application of a bandage. 

 Rubbing the feet with copaiba or Peru balsam, sprinkling them with 

 insect powder, or washing them with bay rum (Berger 1 ) acts as a 

 prophylactic or removes the irritation of the skin produced by the 

 parasites. 



Myiasis. 



Under the name of myiasis we designate the complex symptoms 

 which parasitic dipterous larvae give rise to in man (Braun), and we 

 conceive under the term myiasis externa (dermatosa s. cutanea) all 

 lesions of the human integument caused by fly larvae and of the 

 cavities covered with mucosa therewith connected, such as the 

 external auditory meatus, the oro-nasal cavity, the urethra and vagina. 

 The occurrence of dipterous larvae in the digestive tract is named 

 myiasis intestinalia or interna. 



Myiasis externa. 



The larvae of a species of fly belonging to the Mnscidce, Lucilia 

 macellaria, 2 are found in relative frequency in the nose, especially 

 in America and India. 3 Riley 4 has stated that the screw-worm of 

 Central America and of the United States is nothing else than the 

 larva of Lucilia niacellaria, and also that the Brazilian fly named 

 " berna " may be no other than Lucilia macellaria. Their offspring 

 may set up inflammatory disturbances in the soft tissues of man. This 

 fly has a wide distribution, from the Argentine Republic to Canada, 

 also in the British portions of the East Indies, where the disease is 

 named " peenash." This word is derived from the Sanskrit, and is 

 said to be a collective name for all diseases of the nose. Lahory 5 

 states that within a period of nine years ninety-one cases of " peenash" 

 occurred in Allyghar, two of these ending fatally. Lucilia macellaria 

 is not at all timid but bold, like the house-flies and blue-bottles, 

 its relatives. It not only lives at no great distance from human 

 dwellings, and forces its way into villas and country houses, but even 

 attacks its victims without awaking them from their sleep. Although 

 this species shows a certain preference for nasal cavities affected with 

 catarrh or pus (v. Frantzius 6 ), and also the external auditory meatus, 



1 Berger, Therap. Monatsk., April, 1907. 



'-' \Chrysomyia macellaria, p. 587. F. V. T.] 



3 \C. macellaria, Fabricius, the screw- worm fly, is found in tropical America and the 

 West Indies. The genus is restricted to America. The species from India is a Pycnosoma. 

 F. V. T.] 



4 Riley, American Naturalist, 1883, xvii. 



5 Lahory, Edin. Med. fourn., 1856. 



6 v. Frantzius, Virchow's Archiv, 1868, xliii. 



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