In order for microorganisms to grow and reproduce, a source of energy, nutrients and certain environmental conditions are needed. In the laboratory condition, these requirements are met by a culture medium. This is basically an aqueous solution or an agar medium to which all the necessary nutrients have been added. Depending on the type and combination of nutrients, different categories of media can be made. UFC Biotech Inc. offers a broad range of media formulations that are used in clinical diagnostics, food, environment, cosmetic, dairy, water and pharmaceutical industries. UFC Biotech supplies these culture media in petri dishes and glass tubes in the form of agar media or broths that are used to detect and identify pathogenic microorganisms, such as E. coli, Salmonella. These microbial media can be complex or defined or selective/differential media. A complex media which supports most heterotrophic organisms are rich in nutrients, with water soluble extracts of plant or animal tissue (e.g., enzymatically digested animal proteins such as peptone and tryptone), with an added sugar as the main carbon and energy source. The combination of extracts and sugar creates a medium which is rich in minerals and organic nutrients, but since the exact composition is unknown, the medium is called complex. Defined media supports specific heterotrophs and are composed of pure ingredients whose exact chemical composition known. Also it contains a sugar as the carbon and energy source, an inorganic nitrogen source, various mineral salts and if necessary growth factors. The selective (suppress unwanted microbes, or encourage desired microbes) /differential media (distinguish colonies of specific microbes from others) are based on either of the two categories above and supplemented with growth-promoting or growth-inhibiting additives to achieve selectivity/differentiation. For example the additives may be species- or organism-selective such as cyclohexamide which inhibits all eucaryotic growth and is typically used to prevent fungal growth in mixed cultures.