Beneficial and Harmful Bacteria
Many bacteria harm us by causing many diseases. On the other hand some bacteria are very useful.
Diseases Caused By Bacteria
- Vibrio cholerae - Cholera
- Salmonella typhi - Typhoid
- Clostridium tetani - Tetanus
- Corynebacterium diphtheriae - Diphtheria
- Mycobacterium tuberculosis - Tuberculosis
Beneficial Activities of Bacteria
Rhizobium
It is found in roots of legumes, like peas, grams, pulses, etc, where it fixes atmospheric nitrogen as ammonia, which is then converted into useful amino acid.
Azotobacter
It makes the soil fertile. It fixes atmospheric nitrogen in the soil.
Streptomyces
It produces Streptomycin antibiotic.
Lactobacillus
It ferments lactose (milk sugar) to lactic acid. This helps in setting of milk into curd.
Methanogenic bacteria
It helps in Sewage treatment.