CBSE Class 5 EVS NCERT Solutions: Chapter 8 A Treat For Mosquitoes

Yes, I know a friend who had malaria. To find out if they had malaria, a doctor performed a blood test. The results of this blood test confirmed the presence of malaria in their body.

When my friend had malaria, they experienced several problems. The most significant issue was a high fever, which came in waves, causing bouts of shivering. This illness also made them feel very weak and drained of energy.

Besides malaria, mosquito bites can cause several other serious diseases. Some of these include:

1. Dengue
2. Chikungunya
3. Filaria

Malaria is generally more common during the rainy season. This is because the rainy season provides an ideal environment for mosquitoes to breed. The increased rainfall leads to more stagnant water, such as puddles and collected rainwater, which serve as breeding grounds for mosquito larvae.

In my house, we use mosquito repellants to protect ourselves from mosquito bites.

After asking my friends, I found out that they use a variety of methods, including:

1. Mosquito repellants, which come in different forms like coils, liquids, and mats.
2. Applying mosquito repellant cream directly on the skin.
3. Using mosquito nets, especially while sleeping.
4. Installing wire mesh on windows and doors to prevent mosquitoes from entering.
5. Keeping the surroundings clean and free from potential breeding sites.
6. Regularly removing any stagnant water from pots, coolers, or other containers around their homes.

To determine if the person has malaria from the blood test report, we need to look for specific terms. The report clearly states that "malarial parasite was found in the blood." The presence of malarial parasites is the definitive indicator that the person is suffering from malaria.

According to Aarti's blood report, the minimum haemoglobin level required in the blood is 12 gm/dl. This is the standard benchmark for healthy haemoglobin levels.

Aarti's haemoglobin level increased by 2.5 gm/dl. This represents a significant improvement, approximately a 30% increase from her previous level. It took about three months for her haemoglobin to reach this improved level, indicating a gradual recovery process.

The newspaper report highlights that anaemia causes significant problems for children, affecting both their physical and mental well-being. It states that children suffering from anaemia do not grow properly and have low energy levels. This lack of energy and proper growth can negatively impact their ability to concentrate and study effectively.

Yes, my mother had to undergo a blood test about six months ago. The reason for the blood test was that she was suffering from a persistent fever, and the doctor wanted to diagnose the cause of her illness.

The blood test report revealed that my mother was suffering from malaria. This diagnosis helped the doctors to start the appropriate treatment for her condition.

Yes, my school organized a health check-up camp about three months ago. During the check-up, the doctor examined me and informed me that I was fit and healthy. This indicated that I did not have any immediate health concerns.

I asked my father about food items rich in iron. He told me that several green leafy vegetables are excellent sources of iron. Examples include spinach, lettuce, and cabbage. These foods are important for maintaining healthy blood levels and preventing anaemia.

Yes, I have seen posters similar to the one described, often displayed in public places such as near my school or in community areas. These posters are usually put up to raise awareness about health issues.

Such posters and advertisements in newspapers are typically put up or sponsored by the government, specifically by health departments or public awareness organizations. Their aim is to inform the public about important health matters and preventive measures.

The poster contains several important points aimed at preventing mosquito-related diseases and controlling mosquito populations. Key messages include:

1. A warning to be aware of mosquitoes, as they transmit serious diseases like malaria, dengue, and chikungunya.
2. Instructions not to allow water to stagnate in the surroundings, as this is where mosquitoes breed.
3. Emphasis on keeping the environment clean to eliminate potential breeding grounds for mosquitoes.
4. A suggestion to put fish in ponds, as fish consume mosquito larvae.
5. Recommendation to use mosquito nets to protect against bites.
6. Advice to spray kerosene oil on stagnant water surfaces to prevent mosquito eggs from hatching and growing.

Pictures of a tank, cooler, and pits are shown in the poster because these are common places where water can collect and stagnate around homes and in communities. Such stagnant water provides an ideal breeding ground for mosquitoes, allowing them to lay eggs and multiply. Highlighting these areas serves as a reminder to check and empty them regularly to prevent mosquito breeding.

The poster suggests putting fish in tanks because fish are natural predators of mosquito larvae. The fish eat the mosquito larvae that live in the water, thereby helping to control the mosquito population and prevent them from growing into adult mosquitoes that can spread diseases.

When a thin film of oil is spread on the surface of stagnant water, it prevents the water from mixing with the air. This oil layer blocks the supply of oxygen to the mosquito eggs and larvae that are submerged in the water. Without sufficient oxygen, the eggs and larvae cannot survive, and they eventually die, thus preventing the development of adult mosquitoes.