Bacterial Infection in a Previously Uninfected House Cat Would Most

Question

Bacterial infection in a previously uninfected house cat would most quickly activate its
A) Toll-like receptors that bind to lipopolysaccharides.
B) memory cells to produce antibodies.
C) plasma cells to produce antigens.
D) cytotoxic T cells.
E) humoral immune responses.

Accepted Answer

Toll-like receptors (TLRs) are the first line of defense in the innate immune system and are responsible for detecting the presence of bacteria and initiating an inflammatory response. TLRs recognize various microbial components, including lipopolysaccharides (LPS), which are found on the surface of many bacterial species. Therefore, the most rapid response to a bacterial infection in a previously uninfected house cat would be the activation of TLRs that bind to LPS.