Lesson 3 ·Class 9 · Diseases : Cause and Control · Respond
Preventing Communicable Disease
The route in decides the way out.
Every control measure works by blocking one specific route. Choose the measure that fits.
Handled 0/4
Situation 1 of 4
💧 Cholera cases are rising in a settlement. Which single measure will do most to stop it?
Free play — read each situation and choose what you would do; each choice explains itself. Switch to when you're ready to test yourself.
First identify the route — water, air, vector, or wound — then block that route. The wrong measure is usually one that blocks a different one.
What this lesson covers
Challenges to clear
- Choose correctly in all four cases.
- Answer the rusty-nail case correctly.
The task
Every control measure works by blocking one specific route. Choose the measure that fits.
What this lesson covers
- Cholera cases are rising in a settlement. Which single measure will do most to stop it? Best choice: Ensure a safe, chlorinated water supply and proper sanitation — Cholera is water-borne. Cutting the faecal-oral route stops transmission at its source.
- A family member is diagnosed with tuberculosis. What matters most for the rest of the household? Best choice: Ensure the patient completes the full course of treatment, and keep rooms well ventilated — Treating the patient makes them non-infectious, and ventilation disperses droplets. Stopping the course early breeds drug-resistant TB.
- A child cuts a foot on a rusty nail in a field. What is the correct response? Best choice: Clean the wound thoroughly and get medical advice about a tetanus injection — Clostridium tetani thrives in deep, dirty wounds with little oxygen. Cleaning plus antitoxin or a booster is the standard response.
- Dengue is spreading in a neighbourhood after the rains. What should residents do first? Best choice: Empty every container of standing water around their homes — Aedes breeds in small collections of clean, still water — flower pots, coolers, tyres, tanks. Removing them removes the mosquito.
Hint
First identify the route — water, air, vector, or wound — then block that route. The wrong measure is usually one that blocks a different one.