Answer :
The 4 main areas of biological contamination are chemical, microbial, physical, and allergenic.
Microbiological contamination refers to the non-intended or accidental introduction of infectious material like bacterium, yeast, mould, fungi, virus, prions, protozoa or their toxins and by-products.
Physical contamination happens once a object enters food at some stage of the assembly or preparation method. Physical objects in food is a choking hazard and infrequently introduce biological contaminants likewise.
Biological contaminants embrace bacterium, viruses, animal dander and cat secretion, house dust, mites, cockroaches, and pollen. There ar several sources of those pollutants. By dominant the ratio level in a very home, the expansion of some sources of biologicals is decreased .
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