WIDAL'S SERUM-TEST
\wˈɪdə͡lz sˈɛɹəmtˈɛst], \wˈɪdəlz sˈɛɹəmtˈɛst], \w_ˈɪ_d_əl_z s_ˈɛ_ɹ_ə_m_t_ˈɛ_s_t]\
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A test for typhoid fever made by adding one part of blood-serum from a suspected case to ten parts of a bouillon-culture of typhoid bacilli. If the person has typhoid a reaction occurs, consisting of gradual loss of motility in the bacilli after their coagulation into groups.
By Willam Alexander Newman Dorland
