A substance or antibody that counteracts or neutralizes endotoxins, which are harmful substances released by certain bacteria.
From anti- + endotoxin (from endo-, meaning inside, + toxin). This medical term emerged with modern bacteriology to describe immune responses.
When bacteria die, they release endotoxins that can cause dangerous inflammation—doctors use antiendotoxin treatments to help prevent septic shock, especially in critical care units treating severe infections.
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