З. И. Вайнштейн Л. С. Плебейская

-ence, -ance: occur, persist, exist, depend, enter, clear, appear; -ment:
impair, develop, move, establish, appoint, require; -able: favour, control, vary, depend, value, consider; -sion: invade, divide, conclude, decide, diffuse; -th: deep, grow, wide, strong, long, warm, dead; -ish: thin, fat, long, woman, yellow, thick; -ful: use, hope, pain, harm, rest, thank, help. ^IX.

IX. Answer the following questions:
1. What conditions are favourable for the growth and life of both aerobic and anaerobic microbes? 2. According to what are bacteria divided into groups? 3. To what limit do growing organisms increase in size when they multiply? 4. Due to what are minute virulent microorganisms destroyed when they invade the human organism? 5. In what case may local or general infection occur? 6. What can be revealed under the microscope in the alveoli of the lung of the man with lobar pneumonia? 7. Why may the lung

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Cycle IV. Microbiology

be considerably impaired while the disease persists? 8. What barriers do skin and mucous membranes form? 9. What is the role of leucocytes in the human body?

10. 
    Read and retell Text B.
    

Text B. Robert Koch

Robert Koch is a prominent German bacteriologist, the founder of modern microbiology. He was born in 1843, died in 1910. When Koch became a doctor, he carried on many experiments on mice (мышах) in a small laboratory. In 1882 Koch discovered tuberculosis bacilli. In his report made in the Berlin Physiological Society Koch described in detail the morphology of tuberculosis bacilli and the ways to reveal them. Due to his discovery Koch became known all over the world, in 1884 Koch published his book on cholera. This book included the investigations of his research work carried out during the cholera epidemic in Egypt and India. From the intestines of the men with cholera Koch isolated a small comma-shaped (в виде запятой) bacterium. He determined that these bacteria spread through drinking water. In 1905 Koch got the Nobel Prize for his important scientific discoveries.
LESSON 25
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