Question

QUESTION 23 As a result of this structure, large amounts of LPS bind to macrophages causing them to release excessive amounts of inflammatory cytokines. The LPS and cytokines bind to neutrophils causing extracellular killing and tissue destruction and, when systemic, can lead to SIRS. This is used as a virulence factor by Neisseria meningitidis, E.coli, Salmonella, Shigella, and Enterobacter. This best describes what? A Gram-positive cell wall A Gram-negative cell wall. An acid-fast cell wall. A bacterial cytoplasmic membrane.

Answer 1

Gram negative bacteria because gram negative bacteria contain lipopolysaccharide (Lps) which binds to the toll like receptor present on dendritic cells or other cells (antigen presenting cells) ehich then express cytokines or other inflammatory molecules which is used by other cells and make immune response.

Gram positive bacteria don't have lps on their cell wall.

Thank you