VI. Say whether the following statements are true or false.

1. The virus named HIV-1 occurs mainly in Africa.

2. HIV-2 occurs throughout the world.

3. HIV destroys CD4 cells as fast as they are produced.

4. There are six periods in AIDS flow.

5. An infected person can transmit the virus to another person only if symptoms are present.

6. All people who have the virus know about it.

7. People who have the virus may look and feel completely well.

VII. Fill in the words from the list, then make sentences using the completed phrases.

key, eating, yeast, closely, transmit, share, weight, health-care, immu­nodeficiency, develop

1. __________ related

2. __________ role

3. __________ symptoms

4. __________ infections

5. __________ loss

6. __________ a virus

7. __________ needles

8. __________workers

9. __________utensils

10._________ syndrome

Antibiotics.

Антибіотики.

1. Обґрунтування доцільності профілактичних заходів щодо низки хвороб;

2. Аналіз, порівняння, систематизація й коментування одержаної інформації;

3. Вміння робити власні висновки.

Text 1

Read the text and correct the false statements.

1. Antibiotic is a kind of microbes.

2. Antibiotics damage all cells of the body.

3. The number of deaths that are caused by meningitis, pneumonia, and scarlet fever had declined before people began using antibiotics.

4. Antibiotics are not effective in treating infectious diseases in animals.

Antibiotics

Antibiotic is a drug produced by certain microbes. Antibiotic sub­stances are obtained from bacteria and fungi that live in the air, soil, and water. Most antibiotics are used by physicians to fight various diseases caused by harmful microbes. A few are used to treat certain cancers.

Antibiotics are selectively toxic — that is, they damage certain types of cells, but do not damage others. Many antibiotics are harmful to the cells of pathogenic (disease-causing) microbes, but they do not normally damage human cells. Physicians use these types of antibio­tics to treat a variety of bacterial diseases, including gonorrhea, syphi­lis, and tuberculosis, and infections caused by staphylococcal and streptococcal bacteria. A small number of antibiotics, however, were developed to attack human cells. Some of these are used to treat can­cer. They are selectively toxic mostly because they only damage cells that are in the process of dividing.

Antibiotics are sometimes called "wonder drugs" because they can cure many diseases that once were often fatal. The number of deaths that are caused by meningitis, pneumonia, and scarlet fever has de­clined drastically since people began using antibiotics.

Antibiotics are also used to treat infectious diseases in animals and to control bacteria and fungi that damage fruits and grains. Farmers sometimes add small amounts of antibiotics to livestock feed to stimu­late the animals growth.

Text 2

Read the text and choose the correct variant.

1. Antibiotics are used to treat viral/bacterial infections.

2. Limited-spectrum/broad-spectrum antibiotics fight G+ and G- in­fections.

3. Antibiotics that fight pathogenic fungi/G+ infections include ny­statin and griseofulvin.

4. Every/No broad-spectrum antibiotic is effective against all bacte­rial infections.

Дата добавления: 2015-10-31