- Making curd - Lacto bacillus is a bacterium that promotes the formation of curds
- Bacteria are also involved in making of cheese.
- Commercial use of micro organism - Yeast is used in the formation of alcohol and wine. Yeast converts the sugar into alcohol by a process called fermentation.
Antibiotics are medicines which kill the growth of disease causing micro organism.
When the disease causing microbes enter our body, the latter produces antibodies which protect us from diseases. This is how vaccines work.