Question

Which of the following cell types is least effective against extracellular bacterial pathogens?

Options

• B-cells

• Cytotoxic T-cells

• Helper T-cells

• Macrophages

Answer 1

Cytotoxic T-cells

Explanation:

Cytotoxic T-cells mainly target and kill infected host cells, especially those harboring intracellular pathogens like viruses, and are less effective against extracellular bacteria. In contrast, B-cells, Helper T-cells, and Macrophages play significant roles in humoral immunity, activation, and phagocytosis of extracellular bacteria respectively.