Rocky Mountain Spotted Fever |
Common terms and phrases
agglutinate ASHBURN bacterium Bitter Root Valley blood Board of Health body brown stripes Bull capitulum Chicago Press chipmunk chitinous clinical Contrib coxa Dermacentor andersoni dilutions dorsal eggs enlarged erythrocytes fastigium feeding female tick fever of Montana genital aperature Govt grooves ground squirrel Citellus guinea pigs haemorrhages Health and Mar Health and Mar.-Hosp Health and Marine-Hospital Health Rep host Idaho incubation period varying infected ticks infected zone larval male mammals Marine-Hospital Service MILITARY SURGEONS millimetres Montana Montana and Idaho Mountain spotted fever necrosis occurs Oreg Oregon oviposition pair of legs Piroplasma Hominis Portland posterior rabbit Ricketts rock squirrel Rocky Mountain spotted Science scrotum scutum Sentinel serum so-called spotted fever species Spotted fever tick squirrel Citellus columbianus stigmal plates susceptible temperature throughout the disease tion transmission of Rocky transmit the disease U. S. Dept U. S. Pub Univ usually Valley of Montana virus Wash Wilson and Chowning Wood zoological investigation
Popular passages
Page 8 - an acute, endemic, non-contagious, but probably infectious, febrile disease, characterized clinically by a continuous moderately high fever, severe arthritic and muscular pains, and • a profuse petechial or purpural eruption in the skin, appearing first on the ankles, wrists and forehead, but rapidly spreading to all parts of the body.
Page 14 - ... may be thus summarized: 1. The appearance of the disease is coincident with the period of activity of the wood tick. 2. The disappearance of the disease is coincident with the disappearance of the wood tick. 3. The limitation of the disease in a certain locality suggests the conveyance of the germ to man by a temporary parasite "traveling slowly and not widely and which Is not carried far by the wind. The tick answers this description.
Page 15 - ... infective as long as they live and will bite. From the foregoing it may be deduced that the tick is the disseminator of the casual agent of the disease in nature. As a final and clinching proof, McCalla (35) removed a tick from a man suffering with the disease and, with their consent, infected a man and woman by its bite. Since it has been proven that the disease exists in ticks in nature, it is to be expected that the distribution of the disease is the same as the distribution of the dermancentor....
Page 21 - ... certain ovoid intracorpuscular bodies in both fresh and stained blood taken from persons suffering with spotted fever. Anderson (i, 2, 3) agreed with them that this organism, which they named "piroplasma hominis," was "very probably the .cause of spotted (tick) fever." Ashburn (5) and Stiles (65-67) failed to confirm this view and the latter stated that "indications are not lacking, that at least some of the stages of the supposed piroplasma hominis consist in reality of vacuoles, blood platlets,...
Page 17 - The noneengorged female is about the same size as the male, 5 by 2/5 mm. The body is oval and broader posteriorly than anteriorly. The scutum extends as far back as the third pair of legs and is marked like the corresponding portion of the scutum of the male. There is a dorsal marginal groove and three longitudinal grooves. Eleven festoons on the posterior margin. The genital aperature on the ventral surface is opposite the second coxa, and from it the genital grooves run backward, diverging laterally...
Page 7 - Bradbury (75). •Personal letter. Data regarding the prevalence of Rocky Mountain spotted fever in the known infected localities is very sparse except in Montana and Idaho. In the latter state, Dr. Edward E. Maxey of Boise, collected data on 380 cases which occurred during 1908. The following table shows the occurrence of the disease in the Bitter Root Valley from 1885 to 1911, inclusive, representing data collected by Wilson and Chowning, Anderson, Stiles and McClintic: Human Cases of Rocky Mountain...
Page 5 - ... prevalence, intimate association with wood ticks, and variation in severity in different localities combine to make it one of the most interesting and intricate disease problems which have arisen in our generation. It has a peculiar interest, because apparently it is confined to the American continent, and it has therefore been considered appropriate to present a brief review of the progress in the study of the disease and to indicate the lines along which investigative and eradicative work should...
Page 11 - ... Prognosis. In the Idaho cases the prognosis seems to be very favorable, as a rule the case fatality rate averaging less than 4 per cent. The disease is far more lethal in Montana, and there the case fatality rate averages close to 75 per cent, although in some years it has fallen as low as 33.3 per cent. Death may occur as early as the third or as late as the eighteenth day of the disease. In general, if the patient survive the tenth day, the prognosis is far more favorable. Continuously high...
Page 6 - Col., Deputy Surg. Gen., retired) Marshall W. Wood, MC, USA Boise, Idaho, read a paper entitled "Some observations on the so-called spotted fever of Idaho" (32), before the Oregon State Medical Society, that the disease began to attract any widespread attention. This lucid paper expresses the opinion that spotted fever is a specific disease and gives an accurate description of its clinical manifestations. In 1902, the then newly organized Montana State Board of Health selected for its first task...