Microorganisms serves various medicinal purposes which include:
(i)The production of antibiotics such as penicillin and Streptomycin with the help of certain bacteria and fungus, which is used to treat microbial diseases in animals and plants.
(ii) The production of vaccines which enhances the growth of antibodies in animal and human body, which fight against the infections and disease causing microbes.
(iii) Lactobacillus acidophilus, a bacteria present in human intestines, digests the food and fight against disease causing microbes.
(iv) Chlorella, a type of algae, which is rich in proteins and nutrients, is used as a food supplement.