Grade 7
Course ContentCommon diseases
Habari Mwanafunzi! Let's Talk About Staying Healthy!
Have you ever missed a game of football with your friends or had to skip school because of a nagging cough or a troublesome tummy? We all have! These sicknesses that sometimes try to spoil our fun are called diseases. But here is the good news: knowledge is power! By understanding the common diseases around us here in Kenya, we can become champions of our own health. Let's dive in and learn how to keep ourselves, our families, and our communities strong and healthy!
What is a Disease? The Two Main Teams
Think of diseases as being on two different teams. Understanding which team a disease plays for helps us know how to fight it.
- Communicable Diseases: These are the "passing" diseases. They can spread from one person to another, like passing a ball. They are caused by tiny invaders called germs (like bacteria, viruses, and parasites).
- Non-Communicable Diseases (NCDs): These are the "personal" diseases. You can't catch them from someone who is sick. They are often related to our lifestyle – what we eat, how much we exercise, and our family history.
Team 1: The Common Communicable Diseases in Kenya
These are the ones we hear about most often. Let's unmask them!
Malaria: The Mosquito's Nasty Bite
We all know the buzz of a mosquito at night, especially in areas like the Coast or near Lake Victoria. But it's the female Anopheles mosquito that is the real troublemaker!
Story Time: Meet Juma from Kisumu. One evening, he started feeling very cold and was shivering, even with a warm blanket. Soon after, he developed a very high fever and a bad headache. His mother knew these signs and took him to the nearby clinic. The doctor confirmed it was malaria. Juma got his medicine and was told to always sleep under a treated mosquito net.
- Cause: A tiny parasite transmitted by the bite of an infected female Anopheles mosquito.
- Common Symptoms: High fever, chills and shivering, headache, muscle aches, and feeling very tired.
- Prevention is Key:
- Always sleep under an insecticide-treated mosquito net.
- Clear bushes and drain stagnant water around your home where mosquitoes breed.
- Wear long-sleeved clothing in the evenings.
Image Suggestion: A vibrant, hopeful photo of a Kenyan community health volunteer demonstrating to a young mother and her children how to properly tuck in a mosquito net around a bed in a simple, rural home. The atmosphere is sunny and educational.
Cholera & Typhoid: The "Tummy Troubles" Twins
These diseases are often spread through contaminated water and food. They can spread very quickly, especially after heavy rains or in crowded areas with poor sanitation.
- Cause: Bacteria that get into our bodies when we drink unclean water or eat food that has been washed with it or handled with dirty hands.
- Symptoms: Severe diarrhoea (often watery, like "rice water" for cholera), vomiting, stomach cramps, and dehydration (losing too much body water).
- Prevention Power: The solution is simple!
- Wash your hands with soap and clean water always, especially after using the latrine and before eating.
- Drink boiled or treated water. Never drink directly from the river!
- Cook food thoroughly and eat it while it is hot.
- Wash fruits and vegetables with clean water.
When someone has severe diarrhoea, they lose water and salts quickly. We can make a simple life-saving drink called Oral Rehydration Solution (ORS). Here’s how:
--- HOMEMADE ORS (Sugar-Salt Solution) ---
A simple formula to remember is "Chumvi-Sukari Solution".
Step 1: Find a clean 1-litre container (like a soda bottle).
Step 2: Wash your hands thoroughly with soap.
Step 3: Pour 1 litre of clean, boiled water into the container.
Step 4: Add 1 level teaspoon of SALT. (Kijiko kidogo cha chai cha chumvi).
Step 5: Add 8 level teaspoons of SUGAR. (Vijiko nane vidogo vya chai vya sukari).
Step 6: Stir or shake very well until both the salt and sugar dissolve.
Step 7: Give small sips to the sick person frequently.
This simple mixture can save a life by replacing lost fluids and salts!
Team 2: The Rising Non-Communicable Diseases (NCDs)
As our country develops, our lifestyles change. We ride boda bodas instead of walking, and sometimes we eat more processed foods. This has led to an increase in NCDs.
Diabetes & Hypertension (High Blood Pressure)
These are often called "lifestyle diseases" because our daily choices have a big impact on them.
- Diabetes (Ugonjwa wa Kisukari): This is when your body has trouble controlling the amount of sugar in your blood.
- Hypertension (Presha): This is when the force of blood pushing against your artery walls is consistently too high. It's often called the "silent killer" because it may have no symptoms.
What can we do? It's all about balance!
- Eat a Balanced Diet: Your plate should be a rainbow! Instead of just a mountain of ugali, balance it with plenty of sukuma wiki (kales), mboga (vegetables), and some beans or ndengu (green grams). Reduce your intake of sugary drinks, cakes, and fatty foods.
- Stay Active: Walk to school, play football, dance! Aim for at least 30 minutes of activity most days of the week.
- Avoid a lot of salt: Too much salt can lead to high blood pressure. Taste your food before adding extra salt.
Image Suggestion: A top-down view of a colorful, healthy Kenyan meal on a simple plate. It features a modest portion of ugali, a large serving of bright green sukuma wiki, a scoop of brown bean stew (githeri), and a fresh slice of mango or pineapple on the side.
Breaking the Chain of Infection!
For communicable diseases to spread, a chain of events must happen. If we break just one link in the chain, we can stop the disease! Think of it like this:
(1) Germ (2) Hiding Place (3) Way Out
(Virus/Bacteria) -> (Sick Person/Water) -> (Cough/Faeces)
^ |
| V
(6) New Person (5) Way In (4) How it Travels
(Susceptible Host)<-- (Mouth/Nose) <--------- (Hands/Air/Water)
HOW TO BREAK IT:
- At (4): Wash your hands! Boil your water!
- At (3): Cover your mouth when you cough!
- At (6): Get vaccinated to become strong against germs!
Your Health is in Your Hands!
Wow, we have learned so much! Remember, being healthy is a team effort, and you are the most valuable player on your team. By making smart, simple choices every day—like washing your hands, eating balanced meals, sleeping under a net, and staying active—you are not just protecting yourself, but also your family and your entire community. You are a health champion in the making!
Habari Yako, Health Champion! Let's Uncover the Secrets of Common Diseases!
Have you ever had to miss a fun day of playing kati or had to stay home from school because of a nagging cough, a hot fever, or a troublesome running stomach? We all have! These unwelcome visitors are what we call diseases. But don't worry! Understanding them is the first big step to defeating them. Today, we're going to become disease detectives and learn how to keep ourselves and our families healthy and strong. Twende kazi! (Let's get to work!)
What Are These "Diseases" Anyway?
Think of your body as a well-oiled machine. A disease is simply when a part of that machine isn't working correctly, making you feel sick. In Kenya, just like in the rest of the world, we can group most common diseases into two big families.
- Communicable Diseases: These are the social ones! They can travel from one person to another, from an animal to a person, or even from contaminated water.
- Non-Communicable Diseases (NCDs): These are the personal ones. You can't "catch" them from a friend. They are often related to our lifestyle – what we eat, how much we exercise, and our habits.
Family 1: Communicable Diseases (Magonjwa ya Kuambukiza)
These are the diseases that spread. Let’s look at some that are common in our communities.
1. Malaria: The Mosquito's Unwanted Gift
We all know the buzz of a mosquito at night! Malaria is spread by the bite of a specific female mosquito, the Anopheles mosquito, which carries a tiny parasite. These mosquitoes love breeding in stagnant (still) water, like puddles after it rains, in old car tyres, or in uncovered water drums (mitungi).
Image Suggestion: A vibrant, hopeful illustration of a Kenyan family sleeping peacefully and safely under a blue, treated mosquito net in a simple, clean room. The moonlight streams through a window, highlighting the protective net.
2. Cholera and Typhoid: The Tummy Troublemakers
These diseases are often caused by eating food or drinking water that is contaminated with germs. This can happen if someone doesn't wash their hands with soap after using the latrine or if flies land on our food after sitting on waste.
How Germs Travel (The 'F' Path):
Faeces (Waste)
|
+----> Fluids (Water) ---+
| +----> Fingers --------+
| +----> Flies ----------+----> Food --> New Person
| +----> Fields (Soil) --+
3. The Common Cold & Flu (Homa ya Mafua)
This is probably the most common sickness! It's caused by a virus that spreads through tiny droplets when someone who is sick coughs or sneezes. That's why your teacher and parents always tell you to cover your mouth!
Family 2: Non-Communicable Diseases (NCDs)
These diseases are different. They develop over time and are linked to our lifestyle. They are becoming more common in Kenya as our diets and habits change.
1. Diabetes: The Sugar Problem
This is when the body has trouble controlling the amount of sugar in the blood. While some types are genetic, Type 2 Diabetes is often linked to being overweight and not eating a balanced diet. Eating too many sugary snacks, sodas, and processed foods instead of traditional foods like githeri, fresh vegetables (mboga), and fruits can increase the risk.
2. Hypertension: High Blood Pressure
This is when the force of blood pushing against the walls of your arteries is too high. It's often called the "silent killer" because it may not have obvious symptoms. It can be caused by eating too much salty food, not being physically active, and being overweight.
Let's Do Some Health Math: Calculating Body Mass Index (BMI)
BMI is a simple tool to see if your weight is in a healthy range for your height. It’s a good indicator for risks related to NCDs. Let's learn how to calculate it!
**The Formula:**
BMI = Weight (in Kilograms) / (Height (in Meters) * Height (in Meters))
**Let's try an example:**
Imagine a student named Juma weighs 45 kg and is 1.5 meters tall.
Step 1: Calculate Height Squared
1.5 m * 1.5 m = 2.25 m²
Step 2: Divide Weight by Height Squared
45 kg / 2.25 m² = 20
**Result:**
Juma's BMI is 20. This falls within the healthy range (18.5 - 24.9). Well done, Juma!
Breaking the Chain of Infection
For a communicable disease to spread, it needs a complete chain of events. If we break just one link in the chain, we can stop the disease! Our main goal in prevention is to be a "chain breaker."
[Infectious Agent]-->[Reservoir]-->[Portal of Exit]-->[Mode of Transmission]-->[Portal of Entry]-->[Susceptible Host]
(The Germ) (Where it (How it (How it (How it (The Next
Lives) Leaves) Travels) Enters) Person)
Example: Common Cold
[Virus]-->[Sick Person]-->[Cough/Sneeze]-->[Droplets in Air]-->[Nose/Mouth]-->[A Healthy Person]
Be a Health Champion: Kinga ni Bora Kuliko Tiba!
Our wise Swahili proverb says, "Prevention is better than cure!" It's easier to stay healthy than to get better when you're sick. Here’s how you can be a Health Champion in your home and school:
- Wash Your Hands: Use soap (sabuni) and running water, especially after using the toilet and before eating. This is your superpower against germs!
- Drink Safe Water: Always drink water that has been boiled or treated. Don't drink directly from the river or dam.
- Sleep Under a Mosquito Net: Make sure your family sleeps under a treated insecticide net every single night to prevent malaria.
- Eat a Rainbow: Eat a balanced diet with lots of local vegetables, fruits, and whole grains. Cut down on sugary and fatty snacks.
- Keep Your Environment Clean: Help clear bushes around your home, drain stagnant water, and dispose of rubbish properly to stop mosquitoes and flies from breeding.
A Quick Story: Akinyi the Wise and David the DaringAkinyi and David were neighbours and best friends. After a long day of playing, they were very thirsty. David, being daring, ran to the nearby stream and drank the cool water directly. Akinyi, remembering her health education lesson, went home, took water from their safe storage container, and drank it. The next day, David had a terrible stomach ache and had to miss school. Akinyi was healthy and full of energy. She learned a valuable lesson: being wise about your health is more important than being daring!
You've Got This!
Understanding common diseases isn't about being scared; it's about being empowered! By making small, smart choices every day, you can protect yourself, your family, and your community. You are now a certified Disease Detective and a Health Champion. Go out there and spread knowledge, not germs!
Habari, Health Champions! Let's Become Disease Detectives!
Have you ever had to miss a fun plan with your friends, a family sherehe, or even an important football match because you suddenly felt sick with a fever or a running stomach? It's the worst! But what if I told you that you have the power to become a detective and a hero in your own health story? Today, we are going to investigate some of the most common diseases in our beautiful Kenya, understand how they spread, and learn the simple, powerful secrets to keep them away. Let's get started!
What is a Disease, Anyway? The Two Main Teams
Think of your body as a super-efficient machine. A disease is like a spanner in the works – something that stops your body from working correctly. In Health Education, we group diseases into two main teams:
- Communicable Diseases: These are the "catching" diseases. You can get them from another person, an insect, or from contaminated food and water. They are caused by tiny invaders like bacteria, viruses, or parasites.
- Non-Communicable Diseases (NCDs): These are diseases you can't "catch" from someone else. They often develop over time due to our lifestyle (what we eat, how much we exercise), our genes, and our environment.
The Unwanted Visitors: Common Communicable Diseases in Kenya
Let's meet some of the most common "unwanted visitors" in our communities and learn how to show them the door!
1. Malaria: The Mosquito's Nasty Bite
This is one of the most well-known diseases in Kenya, especially in warmer, humid areas. It is caused by a tiny parasite that is transmitted through the bite of an infected female Anopheles mosquito. These mosquitoes love breeding in stagnant, still water – like puddles after rain, in old tires, or in uncovered water containers.
- Symptoms: High fever, chills and sweating, headache, and body aches.
- Prevention is Key: The best way to fight malaria is to prevent mosquito bites! Sleep under a treated mosquito net EVERY night. Also, help clear bushes around your home and get rid of any stagnant water.
Image Suggestion: A warm, vibrant digital painting of a Kenyan family in their home at dusk. The mother is carefully tucking a treated mosquito net around the bed where two young children are sleeping peacefully. The mood is safe and caring.
2. Cholera & Typhoid: The Tummy Troubles
These diseases are cousins in the world of tummy problems. They are caused by bacteria and spread through contaminated food and water. Think about the water from the river or a vendor selling food with unwashed hands.
- Symptoms: Severe diarrhoea, vomiting, stomach cramps, and dehydration.
- Prevention is Key: The "Wash, Cook, Peel" rule is your superpower here! Always wash your hands with soap and running water, especially after using the toilet and before eating. Drink boiled or treated water, and make sure your food is cooked thoroughly and eaten while hot.
Real-World Story: Amina, a student from Kisumu, went on a school trip. She was very thirsty and drank some water directly from a stream because it looked clean. A day later, she fell very ill with cholera and had to be rushed to the hospital. Her story reminds us that even clear-looking water can carry dangerous germs. Always be safe!
Breaking the Chain of Infection!
Communicable diseases spread in a cycle called the "Chain of Infection". If we can break any link in this chain, we can stop the disease! Our prevention methods are the tools we use to break it.
+-------------------+ +-----------------+
| Infectious Agent |------>| Reservoir |
| (e.g., Bacteria) | | (e.g., A Person)|
+-------------------+ +-----------------+
^ |
| | (Portal of Exit, e.g., a cough)
| v
+-------------------+ +-----------------+
| Susceptible Host |<------| Transmission |
| (e.g., You!) | | (e.g., The Air) |
+-------------------+ +-----------------+
^ |
| | (Portal of Entry, e.g., breathing in)
+---------------------------+
Health Maths: Let's Calculate Body Mass Index (BMI)
To keep an eye on our risk for some non-communicable diseases, we can use a simple tool called the Body Mass Index (BMI). It's a measure that uses your height and weight to work out if your weight is healthy. Let's calculate it for a hypothetical student, Juma.
The formula is: BMI = Weight (in kg) / (Height (in m) * Height (in m))
Step 1: Get the data.
- Juma's Weight: 55 kg
- Juma's Height: 1.60 meters
Step 2: Calculate the height squared.
- 1.60 m * 1.60 m = 2.56 m²
Step 3: Divide the weight by the height squared.
- BMI = 55 kg / 2.56 m²
- BMI = 21.48
Step 4: Interpret the result.
- A BMI between 18.5 and 24.9 is considered a healthy weight.
- Juma's BMI of 21.48 is in the healthy range. Well done, Juma!
Knowing your BMI can help you make good choices about your diet and exercise to stay healthy for life!
Image Suggestion: A bright, colourful infographic designed for students. It shows the BMI formula with cartoon-style illustrations of a weighing scale and a height chart. Below it, a simple colour-coded chart shows the BMI categories (Underweight, Healthy, Overweight) with friendly, encouraging icons.
You Are the Health Hero!
See? You don't need a cape to be a health hero. Your power comes from knowledge and simple actions. By washing your hands, sleeping under a net, drinking clean water, and making healthy food choices, you are building a shield that protects you, your family, and your community from common diseases.
Go on, be a Health Champion! Share what you've learned today and help create a healthier Kenya for everyone.
Pro Tip
Take your own short notes while going through the topics.