Factors Contributing to Malaria Spread

What temperature range is suitable for the survival of the female Anopheles mosquito?

• 10 to 30 degrees Celsius

• 15 to 40 degrees Celsius

• 20 to 50 degrees Celsius

• 25 to 45 degrees Celsius

Answer explanation

The female Anopheles mosquito thrives in temperatures between 15 to 40 degrees Celsius, which supports their survival and reproduction. Other ranges are either too low or too high for their optimal living conditions.

Why do mosquitoes require shaded areas?

• To lay eggs

• To digest their blood meal

• To hide from predators

• To find mates

Answer explanation

Mosquitoes require shaded areas primarily to digest their blood meal. The shade helps them avoid overheating and dehydration, allowing them to process the nutrients effectively.

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. Unlike flowing rivers or ocean water, stagnant water allows mosquitoes to lay eggs and thrive, increasing malaria transmission risk.

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 of malaria?

• They have advanced healthcare facilities

• They are located in cold climates

• They have many pools of stagnant water and people close by

• They are isolated from human populations

Answer explanation

Shanty towns are at risk of malaria because they often have many pools of stagnant water, which are breeding grounds for mosquitoes, and people living in close proximity, facilitating the spread of the disease.

Which of the following is NOT a factor in the spread of malaria?

• High altitude

• Stagnant water

• Human population

• Warm temperatures

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. Human population density and warm temperatures also 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 conditions is NOT conducive to mosquito breeding?

• Stagnant water

• Shaded areas

• Cold temperatures

• Warm temperatures

Answer explanation

Cold temperatures are not conducive to mosquito breeding, as mosquitoes thrive in warm, stagnant environments. Stagnant water and shaded areas provide ideal breeding conditions, while cold temperatures hinder their development.

What role does human population density play in malaria transmission?

• It decreases the risk

• It has no effect

• It increases the risk

• It eliminates the risk

Answer explanation

Higher human population density increases the risk of malaria transmission due to closer proximity of hosts and vectors, facilitating the spread of the disease.