typhoid-paratyphoid A and B vaccine


ty·phoid-·par·a·ty·phoid A and B vac·cine

suspension of killed typhoid and paratyphoid A and B bacilli.
See also: typhoid vaccine. Synonym(s): T.A.B. vaccine

typhoid-paratyphoid A and B vaccine

An obsolete multivalent vaccine that was abandoned in favour of a monovalent typhoid (Salmonella typhi) vaccine, as the “paratyphoid” (Salmonella paratyphi A and S schottmuelleri, formerly S paratyphia) components proved ineffective.