Matching disease control methods to transmission routes

Steps:

• Identify TB as airborne bacterial infection spread by respiratory droplets, controlled via contact tracing to isolate cases.
• Recognize malaria as mosquito-borne parasitic disease, prevented by destroying the vector (mosquitoes) with insecticides or nets.
• Note cholera as waterborne bacterial infection from contaminated sources, controlled by chlorinating water to kill pathogens.
• Compare options to match these methods accurately.

Why C is correct:

• Contact tracing isolates TB contacts per infection control protocols; vector destruction targets malaria's mosquito transmission; chlorination disinfects cholera's fecal-oral route via water treatment standards.

Why the others are wrong:

• A: TB uses BCG vaccination, not just vaccination alone; malaria lacks vaccination and isn't waterborne; cholera spreads via water, not vaccination.
• B: TB isn't waterborne, so no chlorination; cholera vector is not destroyed like insects but via sanitation.
• D: TB has no vector; malaria uses vector control, not vaccination; cholera isn't traced like contacts but sanitized.

Final answer: C