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pseudoreaction
pseudoreaction n.
Brit. 
/ˈs(j)uːdə(ʊ)rɪˌakʃn/
, /ˈs(j)uːdə(ʊ)rɪˌakʃn/U.S. /ˈsudoʊriˌækʃ(ə)n/
a false positive response to a test or stimulus; (Medicine) a hypersensitivity response to diphtheria toxin or toxoid in the Schiff test./ˈsudoʊriˌækʃ(ə)n/ΘΚΠ
the world > health and disease > healing > diagnosis or prognosis > tests > [noun] > reactions to tests
red reflex1864
jaw-jerk1886
pseudoreaction1897
Weil–Felix reaction1919
Schultz–Charlton1922
Kolmer–Wassermann1925
Prausnitz–Küstner1929
1897 Amer. Jrnl. Med. Sci. 113 296 With serum a longer time may be allowed for the development of the reaction, as pseudo-reactions are less likely to occur.
1928 L. E. H. Whitby Med. Bacteriol. xxiii. 238 A reaction occurs in both arms, that on the control being a pseudo~reaction whereas that on the test arm is a combination of a pseudo and a positive reaction.
1988 Q. N. Myrvik & R. S. Weiser Fund. Med. Bacteriol. & Mycol. (ed. 2) xv. 243 Allergic inflammation will develop at both sites within 12 to 18 hours... This reaction in immune individuals is the so-called ‘pseudoreaction’.
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