Aids to microscopic diagnosis : bacterial and parasitic diseases / by Ernest Blake Knox.

  • Knox, Ernest Blake, 1874-1927.
Date:
1909
Catalogue details

Licence: In copyright

Credit: Aids to microscopic diagnosis : bacterial and parasitic diseases / by Ernest Blake Knox. Source: Wellcome Collection.

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    SP1R0CH JET JE 19 sev ere bilious type 70 per cent., ancl of the ordinary type from nil to 12 per cent. Serum diagnosis will give some idea as to the probability of relapse. Treatment is on general lines. Quinine has most effect. African Relapsing Fever, or Tick Fever (Spirochseta duttoni). This is a widespread disease in Central Africa, ranging from the Congo to German East Africa. The spiio- chaeta was first found in Uganda by Greig and Nabario in 1903. Dutton and Todd worked at it later on the Congo, the former dying while carrying out his inves- tigations. Microscopic Diagnosis, etc.—This is made from the blood in the same way as relapsing fever. The spirochteta is indistinguishable from 5. obermeien, but is said to be slightly longer, the spirals to be wider, and the flagella to be more diffuse. The disease is milder (mortality 30 per cent.), shorter, and its attacks less frequent than ordinary relapsing fever. S. duttoni is spread by the bite of the African tick (Ornitliodorus moubata) to man, and from tick to tick as far as the third generation. According to recent work by Colonel Sir William Leishman, R.A.M.C., the infection probably spreads indefinitely. The disease can be reproduced by inocu- lating infected blood into monkeys, rats, etc. Immunity conferred by the spirochmta of tick fever does not confer immunity to diseases produced by other varieties of spirochasta. Syphilis (Treponema pallidum, vel Spirochseta pallida, vel Spironema pallidum). This protozoa, foreshadowed by Donne in 1837, was definitely isolated and described by Schaudinn and Hoff- mann in 1905, and is now regarded as the specific organism of syphilis. An important feature linking it to
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