Understanding Malaria: Causes and Solutions

What temperature range is suitable for the survival of the female Anopheles mosquito, which spreads malaria?

• 5 to 25 degrees Celsius

• 15 to 40 degrees Celsius

• 25 to 45 degrees Celsius

• 10 to 30 degrees Celsius

Answer explanation

The female Anopheles mosquito thrives in temperatures between 15 to 40 degrees Celsius, which is optimal for their survival and reproduction, making this the correct choice.

Why do mosquitoes require shaded areas?

• To lay eggs

• To digest their blood meal

• To find mates

• To avoid predators

Answer explanation

Mosquitoes require shaded areas primarily to digest their blood meal, as these environments help them avoid overheating and dehydration. While they may also seek shelter from predators, the main reason is for digestion.

What type of water body encourages the spread of malaria?

• Flowing rivers

• Stagnant water

• Ocean water

• Freshwater lakes

Answer explanation

Stagnant water provides ideal breeding conditions for mosquitoes, which are the primary vectors for malaria. In contrast, flowing rivers and ocean water do not support mosquito breeding as effectively.

What is necessary for mosquitoes to spread malaria?

• A large forest area

• A human population nearby

• A high altitude environment

• A dry climate

Answer explanation

For mosquitoes to spread malaria, a nearby human population is essential, as they are the primary hosts for the malaria parasite. Without humans, the transmission cycle cannot occur.

How has long-distance travel affected the spread of malaria?

• It has decreased the spread

• It has no effect on the spread

• It has increased the spread

• It has eliminated the spread

Answer explanation

Long-distance travel has increased the spread of malaria by facilitating the movement of infected individuals and mosquitoes to new areas, allowing the disease to reach regions previously unaffected.

Why are shanty towns particularly at risk for the spread of malaria?

• They have advanced healthcare facilities

• They are located in cold climates

• They have many pools of stagnant water and dense populations

• They are isolated from mosquito habitats

Answer explanation

Shanty towns are at high risk for malaria due to the presence of stagnant water, which serves as breeding grounds for mosquitoes, combined with dense populations that facilitate the rapid spread of the disease.

Which of the following is NOT a factor that contributes to the spread of malaria?

• High altitude

• Stagnant water

• Warm temperatures

• Human population

Answer explanation

High altitude is NOT a factor in the spread of malaria, as the disease-carrying mosquitoes thrive in warm, low-lying areas with stagnant water. Warm temperatures and human population density do contribute to malaria transmission.

What is the primary vector for malaria transmission?

• Tsetse fly

• Female Anopheles mosquito

• Housefly

• Sandfly

Answer explanation

The primary vector for malaria transmission is the female Anopheles mosquito. This mosquito species is responsible for carrying the Plasmodium parasites that cause malaria in humans.

Which of the following is a human factor that contributes to the spread of malaria?

• Presence of predators

• Urbanisation

• High altitude

• Cold climate

Answer explanation

Urbanisation creates stagnant water bodies, which serve as breeding grounds for mosquitoes, the primary vectors of malaria. This human factor significantly increases the risk of malaria transmission.

What is the role of stagnant water in the life cycle of mosquitoes?

• It provides a place for mosquitoes to hibernate

• It is where mosquitoes lay their eggs

• It is where mosquitoes find food

• It is where mosquitoes mate

Answer explanation

Stagnant water is crucial for mosquitoes as it serves as a breeding ground where they lay their eggs. Without such water sources, their life cycle cannot progress, making this option the correct answer.