REFERENCES 



1349 



The arsenical solution used as a dip is composed of the following 

 ingredients : — 



Sodium carbonate . . . . . . . . 24 pounds. 



Trioxide of arsenic .. .. .. .. 8 



Pine tar . . . . . . . . . . . . 2 gallons. 



Water . . . . . . . . . . to 500 



A galvanized tank is used containing 30 to 40 gallons of water, which is 

 brought to the boil. The sodium carbonate is now added and dissolved by- 

 stirring, and then the arsenic is dissolved in the same way. The fire is now 

 stopped and the pine tar added in a thin stream and thoroughly mixed by 

 stirring. The solution so formed is the stock, and can be diluted to 500 gallons 

 as required. 



, THE INTERMITTENT TICK FEVER OF WYOMING. 



Definition. — An intermittent fever due to the bite of Dermacentor ander- 

 soni. 



History and Geography. — This fever was described by Kieffer in 1907 as 

 being found at Fort D. A, Russell, in Wyoming, United States of America, 

 but his account so far has not been confirmed. 



etiology. — The fever comes on after the bite of D. andersoni — i.e., the same 

 tick which causes the spotted fever of the Rocky Mountains — but no specific 

 organism has so far been described. 



Symptomatology. — The incubation period varies from three to seven days, 

 after which the disease begins suddenly with a rigor, nausea, vomiting, and 

 pains in the joints and muscles. The temperature rises between 103° and 

 104° F., and continues high for twenty-four to forty-eight hours, after which 

 a remission of forty-eight hours occurs, and then another attack, and so on 

 for three to seven attacks. Less frequently the attack resembles typhoid, 

 with a ladder-like rising temperature and abdominal symptoms, but Widal's 

 reaction is absent. There is marked decrease of the erythrocytes and haemo- 

 globin, and a slight lymphocytosis, due to increase in the number of the large 

 mononuclear leucocytes. 



Treatment. — Hypodermic injections of arsenic in some form are recom- 

 mended as the best treatment for the disease. Salvarsan should be tried. 



REFERENCES. 



Anderson (1903). Spotted Fever (Tick Fever) of the Rocky Mountains. 



Hyg. Lab., U.S. Pub. Health and Mar. Hosp. Service, Wash., Bulletin 14. 

 Arkwright, Bacot and Duncan (1919). Transactions Soc. of Trop. Medicine. 

 Fricks (1916). United States Health Report, 31, 9, 516-521. 

 Hunter and Bishop (191 i). Bulletin 105 U.S.A. Department of Agriculture. 



Washington. 



Megaw {1917). Indian Medical Gazette. {A Case Hke Brill's Disease or Idaho 



Spotted Fever.) 

 Michie and Parsons (1916). Medical Record, 265-277, 

 RiCKETTs (1907). Transactions of the Chicago Pathological Society. 

 Ricketts (1909). Bulletin Johns Hopkins Hospital. 

 RiCKETTS (1909). Journal American Medical Association. 

 Ricketts (1909). Journal of Tropical Medicine. 

 Ricketts (1910). Journal of Tropical Medicine. 



Wilson and Chowning (1904). Studies in Piroplasmosis Hominis. Journal 



of Infectious Diseases, i. 31. 

 Wolbach (1916). Journal of Medical Research, 121-126 and 147-150. 



The intermittent Tick Fever of Wyoming. 



Kieffer (1907). Journal of American Medical Association, April 6. 



