Source:http://linkedlifedata.com/resource/umls/id/C0040555
MSH: Preparations of pathogenic organisms or their derivatives made nontoxic and intended for active immunologic prophylaxis. They include deactivated toxins. Anatoxin toxoids are distinct from anatoxins that are TROPANES found in CYANOBACTERIA.,CSP: toxin that has been treated (commonly with formaldehyde) so as to destroy its toxic property but retain its antigenicity, ie, its capability of stimulating the production of antitoxin antibodies and thus of producing an active immunity; anatoxin is a synonym.