The Serum Diagnosis of Disease
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In our eReader you can find the full English version of the book. Read The Serum Diagnosis of Disease Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Serum Diagnosis of Disease
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My own results in 625 control cases were all negative except in a single instance ; a negro with pernicious anaemia showed a prompt reaction with a dilution ofl:10. The patient had no remembrance of any continued febrile disease. I never tested his blood a second time nor made any experiments with higher dilutions. I think the chances are that I made some slip in technique.
Johnston in " many hundred non-typhoid cases" has never yet seen a positive reaction under conditions where typhoid past o...r present could be excluded.
The six per cent of positive reactions reported in cases other than typhoid are to be explained, I believe, partly by er- rors of technique, and partly by the existence of foci of more or less " healed" typhoid infection within the body, which react to the test as foci of " healed" tuberculosis react to tuberculin.
On the whole I am convinced that a positive reaction always means typhoid infection past or present, provided the test is properly performed. But we must never forget, as we are too apt to do, that a positive serum reaction even in dilutions of 1 : 800 may mean only the leavings of past typhoid infection, since Widal has seen such a reaction eight years after infec- tion.
What to read after The Serum Diagnosis of Disease?
You can find similar books in the "Read Also" column, or choose other free books by Richard C Richard Clarke Cabot to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
My own results in 625 control cases were all negative except in a single instance ; a negro with pernicious anaemia showed a prompt reaction with a dilution ofl:10. The patient had no remembrance of any continued febrile disease. I never tested his blood a second time nor made any experiments with higher dilutions. I think the chances are that I made some slip in technique.
Johnston in " many hundred non-typhoid cases" has never yet seen a positive reaction under conditions where typhoid past o...r present could be excluded.
The six per cent of positive reactions reported in cases other than typhoid are to be explained, I believe, partly by er- rors of technique, and partly by the existence of foci of more or less " healed" typhoid infection within the body, which react to the test as foci of " healed" tuberculosis react to tuberculin.
On the whole I am convinced that a positive reaction always means typhoid infection past or present, provided the test is properly performed. But we must never forget, as we are too apt to do, that a positive serum reaction even in dilutions of 1 : 800 may mean only the leavings of past typhoid infection, since Widal has seen such a reaction eight years after infec- tion.
What to read after The Serum Diagnosis of Disease?
You can find similar books in the "Read Also" column, or choose other free books by Richard C Richard Clarke Cabot to read onlineMoreLess
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