Microbes In Human Welfare

Micro-organisms such as Lactobacillus an others commonly called Lactic Acid Bacteria grow in milk and convert it to curd. It also improves its nutritional quality by increasing vitamin- .

A mere impurities make domestic sewage unfit for human use. These impurities include suspended solids (e.g., sand, silt and clay), colloidal material (e. g., Faecal matter, bacteria, cloth and paper fibres) and dissolved materials e.g., nutrients (nitrate, ammonia, phosphate, sodium, calcium, etc.).

Aspergillus niger (a fungus) is used in commercial production of citric acid. Acetobacter acetic (a bacterium) produces acetic acid, Clostridium butylicum (a bacterium used for butryic acid and Lactobacillus (a bacteria) produces lactic acid.

Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a lot buster for removing clots from the blood vessels of patients who suffered from myocardial infraction leading to heart attack.

Yeast like Saccharomyces cerevissae is used for fermenting malted cereals and fruits juices to produce ethanol commercially.

Statins produced by the yeast Monascus purpureus have been commercially used as blood-cholesterol lowering agents. It is involved in competitive inhibition of the enzyme responsible for the synthesis of cholesterol.