Diseases

Topic: Diseases

EQ: What are infectious diseases?

Does anyone know what a virus is? Or what Bacteria is? (hands up)

Quick Write: 2mins

Count your words

Diseases

Year 9 Science

A Virus is.... (write this)

A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce many thousands of identical copies of the original virus at an extraordinary rate. Unlike most living things, viruses do not have cells that divide; new viruses are assembled in the infected host cell. But unlike still simpler infectious agents, viruses contain genes, which gives them the ability to mutate and evolve. Over 5,000 species of viruses have been discovered.

This is why i tell you to cover your mouth when you sneeze...

A sneeze travels an average of 5mts!!

In each direction!!

What is bacteria?

Bacteria (singular: bacterium) constitute a large domain of microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals.

Please copy

What is E Coli.....

Do you remember last lesson when we shook hands with each other?

And we discussed hand washing etc?

E coli (Escherichia coli) Is a bacterium commonly found in the intestines of humans and other animals, some strains of which can cause severe food poisoning.

Eye Infection: There’s a reason children are asked to stay at home if they have an eye infection. Viruses and bacteria cause eye infections such as conjunctivitis and trachoma. The fluid that comes from the infected eye can be easily wiped off by someone’s hand and if they don’t wash their hands properly they can infect someone else.

Washing your hands properly doesn’t take any rocket science. Make sure you wash your hands in running water, add anti-bacterial soap, rub your hands for at least 20 seconds, rinse and then dry. Prevent the spread of disease and ask others to do the same.

Quick write,

What is a disease?

1. Draw up a table in your books, 3 columns and 10 rows

Disease Symptoms Prevention

Malaria

Tetanus

Diarrhea

Typhoid fever

Yellow fever

Meningitis

Cholera

Sexually transmitted diseases

Common cold

Hepititis A&B

What is a disease?

1. I will hand out a slip of paper to each person in the class.

2. you must read this slip to yourself

3. Then shake hands with a group member and act out your symptoms

eg. if i had ' The common Cold' I might cough and sneeze during my introduction. The person ive introduced myself to must try to guess what disease i have.

Fill in your table using the slips of paper to help

A disease is an illness that affects a person, animal, or plant: a condition that prevents the body or mind from working normally.

http://dailyvitamina.com/13457/handshakes/

Five Diseases Contracted Through Handshakes

Have you ever shaken someone’s hand and it is sweaty? The first thing you think is why is this person’s hand so sweaty? It’s gross, but at least you know that if you shake someone’s sweaty hand, that you have to go and wash it.But, even though most hands don’t sweat too much, there are germs and there are diseases that you can contract through handshakes, such as:

shaking hands,diseases by shaking dirty hands

Diarrhea: A mixture of bacteria, viruses and parasites can cause diarrhea and if a person doesn’t wash their hands when they use the bathroom, they can pass on that virus or bacteria to another person.

HPV: The Human Papilloma Virus Infection can cause genital warts, which can lead to cancer of the cervix. The virus is located in the warts and hands and there have been studies that the disease can spread through a simple handshake.Genital Herpes: This is a sexually transmitted disease that causes genital pain and sores. The sores contain the virus and if the person infected touches them and then touches other parts of their body or other people, it can spread easily.

Hepatitis A: This is an infection of the liver and it usually spreads through contaminated food, water, and fingers containing the virus. The virus is spread through feces and when people don’t wash their hands, they can transmit the disease very easily.

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