Final answer:
The material released from bacteria leading to shock and death in septicemia is the lipopolysaccharide of the Gram-negative outer membrane, particularly the lipid component. The correct option is A.
Step-by-step explanation:
The material that is released from bacteria which may lead to shock and death in septicemia is Components of Gram-negative outer membrane, specifically the lipopolysaccharide (LPS) which functions as an endotoxin.
During infections with Gram-negative bacteria, endotoxin can be released, particularly when the bacterial cell dies and the membrane disintegrates, or during bacterial cell division. The toxic properties of LPS are largely due to its lipid A component. High concentrations of endotoxin in the blood can cause an excessive inflammatory response that may lead to severe drops in blood pressure, multi-organ failure, and death.
Unlike endotoxin, exotoxins are protein molecules that are mainly produced by gram-positive bacteria and have specific modes of action on specific cells. Teichoic acid and Protein A are also components of Gram-positive bacteria but are not the toxins typically associated with septic shock in Gram-negative infections.
Therefore, the correct option is A.