Question

Useful and harmful bacteria

Answer 1

Answer:

Examples of helpful bacteria are E. Coli (when used for the digestion process), Streptomyces, and Rhizobium. Examples of harmful bacteria are E. Coli (when contaminating food), Listeriosis, and Salmonella.

Answer 2

$\huge\mathfrak{Useful \: Bacteria}$

• Most of the bacteria act as a decomposer. They breakdown large molecules into simple molecules or minerals.

$\mathfrak{Examples \: of \: useful \: bacteria}$

1. Lactobacillus : It helps in curdling of milk.
2. Azotobacter : It helps to fix nitrogen for plants.
3. Streptomyces : It is used in antibiotics production such as streptomycin.
4. Methanogens : These are used for the production of methane (biogas) gas from dung.

$\huge\mathfrak{Harmful \: Bacteria}$

• These includes disease causing bacteria. They causes various diseases like typhoid, cholera, tentans, tuberculosis, etc.

$\mathfrak{Example \: of \: harmful \: bacteria}$

1. Samonella typhyi : It is a causative organism of typhoid.
2. Vibrio cholerae : It causes cholera Mycobacterium.
3. Tuberculosis : It causes tuberculosis Clostridium.
4. tetani : It causes tetanus.