206 Insects and Disease 



Nash, J. C. T. The ^Etiology of Summer Diarrhea. Lancet, 

 164, 1903, p. 330. Believes house-fly carries this disease be- 

 cause the two appear and disappear together. 



Robertson, A. Flies as Carriers of Contagion in Yaws. Jour. 

 Trop. Med. & Hyg., ri, 1908, No. 14, p. 213. As a result 

 of examinations the author concludes that the house-fly is 

 capable of carrying the virus of yaws. 



Sandilands, J. E. Epidemic Diarrhea and the Bacterial Con- 

 trol of Food. Jour. Hyg., 6, 1906, pp. 77-92. Believes that 

 house-flies convey these diseases from the excrement of in- 

 fected infants. 



Sib thorpe, E. H. Cholera and Flies. Brit. Med. Jour., Sept., 

 1896, p. 700. Flies considered scavengers, think they thus 

 help abate the disease. 



Smith, T. The House-fly as an Agent in Dissemination of In- 

 fectious Diseases. Amer. Jour. Pub. Hyg., Aug., 1908, 

 pp. 312-317. Points out that flies on account of their habits, 

 are dangerous sources of contamination. 



Smith, Theobald. The House-fly at the Bar. Merchants' 

 Assn., New York, 1909, pp. 1-48. Letters from various 

 authorities giving their opinion; quotations from various 

 authors. Bibliography. 



Veeder, M. A. Flies as Spreaders of Sickness in Camps. Med. 

 Record, 54, 1898, pp. 429-430. Flies feed on typhoid excreta 

 and pass to food. Cultures made from fly tracks and excreta 

 show many bacteria present. 



Veeder, M. A. The Relative Importance of Flies and Water 

 Supply in Spreading Disease. Med. Record, 55, 1899, pp. 10- 

 12. Reasons for believing that flies spread disease in many 

 instances. Burial of infected typhoid material no protection 

 but a menace. 



Dangers from Flies. E. P. W. Nature, Vol. 29, pp. 482-483. 

 Review of an article by Dr. B. Grassi in regard to flies and 

 various diseases. Opthalmia is discussed. Flies may ingest 



