The standardization of tuberculin / C.C. Okell and H.J. Parish.

  • Okell, C. C. (Charles Cyril), 1888-1939.
Date:
[1927?]
Catalogue details

Licence: In copyright

Credit: The standardization of tuberculin / C.C. Okell and H.J. Parish. Source: Wellcome Collection.

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    Table IIActual and Estimated Values of Samples of Tuberculin Tested by the von Pirquet Method. (S = Standard Tuberculin.) Number of Number of Estimated animals animals values. used. readable. Sample. Correct values. V w X Y Z A, Cl r>! E, Ex Gi Hx Ji Ki Li 70 100 i 80 < s i 50 . < s < s < s = s* \ 20 . =S < 8 =8 < S i 27*5 35 i 10 25 j 16-6 33-3 i 50 33-3 j 0 25 i 50 25 1 90 90 i 50 70 / 50 25 ] 25 12 i 0 50 } 100 50 I 5 9 7 6 5 5 5 7 4 4 7 5 5 5 5 Total 49 * Readings on individual guinea-pigs. 40 CHART I. STANDARDISATION OF TUBERCULIN - SUBCUTANEOU5 TEST. PERCENTAQE MORTALITY IN RELATION TO DOSE. THE. FIQUR.ES IN BRACKETS SHOW THE NUMBER. OF ANIMALS INJECTED WITH EACH DOSE