Chemicals and Dyslexia

I-What is Dyslexia?

Dyslexia is significant and durable deficit of the ability to write properly. This deficit cannot be explained by an evident cause. Dyslexia is a trouble to learn words and retain them that affect essentially boys. Troubles can appear despite not having any brain issues, social troubles, or even despite following a normal schooling process. Today, five to 15 percent of children are affected by dyslexia.

Dyslexia has been recognized as a scholar and learning developmental problem by the World Health Organization in 1991. Dyslexia is not a dangerous disease and children can overcome it with a lot of work and a lot of time.

B-Symptoms and Consequences


The symptoms of dyslexia are mostly related to learning, writing, and reading. It exists different types of dyslexia: visual, phonological, of surface, mixed, and of attention. In the visual one, the child cannot read some words because he does not see them and simply skips them. This type of dyslexia is close to the attention one. The phonological one is related to the sound of words and letters. The dyslexia of surface occurs when the child cannot differentiate the shape of letters (“b” and “d”). Finally, the mixed dyslexia is a mix of the phonological and the surface dyslexia.


The consequences of dyslexia are not as frightening as any other diseases affecting the brain such as autism. With dyslexia, the child might have trouble learning reading and writing, and might also lack attention. However, dyslexia can be overcome and a child may be able to catch up with non-dyslexia affected children with time and effort. Dyslexia is not a deadly disease and its symptoms vary depending on the child.

II-Chemicals Causing Dyslexia
List of Chemicals Causing Dyslexia

Names of Chemicals

Scientists are still working on proving the effects of some chemicals on the brain and their relation to dyslexia. Some chemicals due cause brain troubles and these troubles might be causing dyslexia. Manganese has an effect on the brain and diminishes brain functions and impairs motor skills. Some pesticides might cause cognitive delays. Lead is also a chemical involved in brain issues. Arsenic through drinking water has been linked to reduce cognitive functions in children.

Consequences on Health

The consequences on health vary depending on the amount of chemicals absorbed or breathed. If most of them cause brain troubles that could lead to dyslexia, the correlation has not been proven yet, and scientists are still debating.

B-Other diseases Caused by Dyslexia

Brain Issues Due to Chemicals

Other than dyslexia, chemicals cause diseases that are far more dangerous for the brain and health in general. For example, some chemicals are involved in the apparition of asthma. Others cause autism or even fatal intoxication and cancers such as lead, arsenic, pesticides.

The Danger of Chemicals

Chemicals are everywhere in our modern society. Producers of cereal, vegetables, or other produces use pesticides to protect their crops against insects and worms. Those pesticides find their way inside the food and therefore inside us. They can have a dangerous effect if absorbed in high quantity.

Some buildings are also made with hazardous materials like lead. Those materials, when breathed constantly, can have an effect on the lungs and lead to respiratory issues.

What is the Most hated insect?

Insects are living creature, which one side may have advantages but they are creatures that are hated most. There are like hundreds of insects that are really disgusting and dangerous too, but among all those, which is the most hated insect? Everyone will have different opinions, but according to some surveys the most hated insect all over the world is Mosquito.

Mosquito belongs to insecta class and they are the inhabitant of complete world. They have like dozens of kinds. Moreover they are universally hated and present everywhere in the world; from one corner to other. We have a deep review about mosquitoes and why they are universally hated.

First of all mosquitoes are one of the deadliest animals on the Earth. They can carry any type of virus with them which becomes the cause of spreading deadly diseases. These diseases includes Malaria, Encephalitis, Dengue Fever and Yellow fever. They can also carry earthworm which can be very dangerous for your pets especially dogs. The yearly deaths caused by mosquitoes rank at number one. A single insect can carry multiple viruses with them and once they bit you, the virus is transferred to your body.

Secondly, you might know that only female mosquitoes would bite humans and animals. Male mosquitoes find their food from nectars of flowers. The reason for this behaviour is because female mosquitoes need to lays eggs and they have to take blood meal for this. Moreover mosquitoes eat almost anything from juices to nectar to human blood. Their life span is enough to create misery for mankind. Female mosquito lives from 2 to 100 days and male lives from 10 days to 20 days. Mosquitoes are on one side the most hated insect and on other hand they are most irritating one also. People usually feel annoyed by the sound they produce near ears. One another important thing that we should know that only we; the humans are not their primary targets. Their prey includes birds and herbivorous mammals. Mosquitoes are also prolific creatures and one female mosquitoes may produce 1,000 to 3,000 off springs during her life time. Thus they produce enough troubles for us in their life. One should keep precautionary measures to save themselves from the venomous attach of mosquitoes. Mosquito nets should be used, medicines and sprays should be spread across the living areas. All damp areas should be either filled or covered, as mosquitoes have their nests in damp and wet places. Lastly if mosquitoes are most hated and dangerous creatures, still we can stop them from interfering into our lives.

Asthma and Pesticides

I-What is Asthma?

Asthma is known for being a chronic respiratory problem that affects the bronchitis. When someone suffers from asthma, the bronchitis contract and the respiratory tube gets tighter, leaving less space for the air to go through. Asthma has multiple causes and symptoms, and has few consequences on health.

A-Causes and Symptoms

The causes of asthma are multiple and vary depending on the patient. It exists a genetic component to the disease. It is possible that the disease be transmitted from one parent to a child, however it is still impossible to predict if a child will inherit the asthma problem.
Most of the time, asthma is triggered by allergies. A patient could be allergic to dust, pollen, or it can also be caused by an effort that requires an extra work on breathing such as running, exercising, or walking long distances.
The symptoms of asthma are high-pitch breathing due to tight bronchitis, coughing, hard time to breathe during an effort, and a feeling of compression on the thorax.

B-Consequences on Health

The consequences of asthma on a patient’s health depend on how strong the issue is and how it is triggered. If the asthma comes from allergy, it is easily controllable by simply avoiding what causes the allergies. If it is caused by effort, the patient can work on it by exercising more frequently. Having asthma does not stop people from practicing a sport, unless the asthma crises are extremely strong and respiration is almost impossible. However, many athletes are or were asthmatic and they overcome the issue.

II-What are Pesticides?

A-The Role of Pesticides

Pesticides are chemical products used in agriculture to protect plants, fruits, and vegetables from insects and other organisms susceptible to affect the produces by destroying them.
It exists three different forms of pesticides: Herbicides used to fight bad grass, fungicidesto protect against fungus, and finally insecticides to keep insects away.

B-The Toxicity of Pesticides

Pesticides only work because they are made out of chemicals. Those chemicals include one or multiple active agents, a molecule that has a bad effect on the plant. Even though a diluent is added to the mixture to decrease the effect of the active agent, pesticides are still highly toxic.

III-The Relationship Between Asthma and Pesticides

A-The Danger of Pesticides

Because they are made of toxic produces, pesticides have a dangerous effect on health. Misuse or over use of a pesticides can lead to health problems especially among children that are more fragile and can easily contract a disease.  It is hard to know exactly the effect of pesticides on health, but some dangers are already known. For example, even a small exposition to it can trigger complications on the organism, such as infertility for men. Cancers, but can also gravely affect fetuses
It is important to strictly follow the rules when using pesticides in the garden or the fields.

B-Can Pesticides Cause Asthma?

Pesticides can trigger many health issues, including asthma. It is believed that a long exposure to pesticides can cause bronchial hyper-reactivity and asthma. A small exposition to pesticides can lead to a light intoxication. A light intoxication from pesticides has for symptoms an irritation of nasal ways and the throat, which are both symptoms of asthma.
Exposure to pesticides may increase the risk of developing asthma. It can also exacerbate an existing asthmatic condition or even trigger asthma crises by increasing bronchial hyper-responsiveness. Exposure to pesticides is a danger for health and can not only cause asthma, but also many other diseases.