Q. Described Microbiology of Air?

Ans. You would realize that air, by nature, does not contain a natural flora of microorganisms. All that comes into air is by accident and is usually present on the suspended solid materials or in moisture droplet. Microorganisms get into the air or dust or a lint or dry soil, droplets of moisture from coughing, sneezing or talking, sporutalins moulds on walls, ceilings, floors, foods and ingredients. Thus, the air of a dairy plant may contain bacteriophages or at least the bacterial cultures used in the plant. The microorganisms in air have no opportunity for growth, but they merely persist on air and the kinds which are most resistant to desiccation, will live the largest. Mould spores, because of their small size, are resistant to drying and are usually present in the air. Cocci are more numerously found than rod shaped bacteria. Yeasts are also found more in air. It is obvious hat dust or sprays of various materials are carried up into the air, the microorganism's characteristic of those suspended materials will be present.