O SPECIFIC POLYSACCHARIDE
\ˈə͡ʊ spəsˈɪfɪk pˌɒlɪsˈakɑːɹˌa͡ɪd], \ˈəʊ spəsˈɪfɪk pˌɒlɪsˈakɑːɹˌaɪd], \ˈəʊ s_p_ə_s_ˈɪ_f_ɪ_k p_ˌɒ_l_ɪ_s_ˈa_k_ɑː_ɹ_ˌaɪ_d]\
Definitions of O SPECIFIC POLYSACCHARIDE
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The lipopolysaccharide-protein somatic antigens, usually from gram-negative bacteria, important in the serological classification of enteric bacilli. The O-specific chains determine the specificity of the O antigens of a given serotype. O antigens are the immunodominant part of the lipopolysaccharide molecule in the intact bacterial cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
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- Preparations of pathogenic organisms or their derivatives made nontoxic and intended for active immunologic prophylaxis. They include deactivated toxins.