Microbio Laboratory

                        ......Complete Microbiology

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Microbiological Testing of Health, Beauty, Personal Care, Cosmetic Products

Microorganisms in cosmetics may cause biological  or chemical change in the product and can  harm cosmetic, health, beauty, and personal care products. Cosmetics do not need to be sterile, but their preservative system must  able to take care of harmful microbial contamination that can damage the products.


Products are tested by the following methods:

  • Aerobic Plate Count
  • This test determines the total number of aerobic bacteria per ml or gram of the  product. This test gives you total count of bacteria present.

It is a 48 to 72 hour test. This is a routine test, ordered on each lot of manufactured  products.

  • Yeast and Mold Count


This test determines the total number of yeast and fungi per ml or gram of the  product. It is carried out for five days.

  • Enrichment Method for Specific Pathogen Screening


This testing is carried out to assure that the harmful bacteria are not present  not even in very low numbers. Therefore, the product is enriched by growing in the enrichment broth  so pathogenic bacteria, if present in very low number, will be able to multiply and be detected.


  • Staphylococcus aureus Test
  • E coli test
  • Pseudomonas test


  • Microbial Identification

Organisms are isolated from a product and if  it is required  to know which organisms they are,  the Microbial Identification Test of their products is done. Isolates are identified starting with observing their morphology ,Gram stained and observed. This gives an initial clue about whether they are gram negative or gram positive. which are then identified  if  necessary .