Page 192 - Primary Five Science

4. Vibrios

These are comma shaped bacteria. Example Vibrio cause chol-

era

Useful bacteria

1. Bacteria help in the rotting (decomposing) of materials.

2. Bacteria found in nodules on roots of legumes help to im-

prove soil fertility

3. Help in the breaking of volumes of faeces in latrines

4. Some are used in the making of vitamin B12 and K in the in-

testines

5. Some are used in making cheese and yoghurt by fermenting

milk

6. Harmless bacteria fight harmful bacteria in our bodies and

save us from diseases.
7. Some bacteria found in the alimentary canal break down

food molecules making them more digestible
8. Some bacteria are used to make medicine

9. Bacteria found in wetlands help absorb human wastes, mak-

ing water safer for re use and less