because fastidious organisms require specific nutrients that can not be supplied to them in the chemically defined medium therfore dont grow as well
An enriched medium
Blood agar is enriched medium which are complex media to which an extra nutrient source (such as blood in this case) is added to encourage the growth of fastidious heterotrophs.
The best conditions for cultivating streptococci is a bacterium that is fastidious. It likes complex medium containing blood cultivating at 37 degrees Celsius.
undefined
it depends on the organism.
An enriched medium
No because fastidious organisms, or organisms that have highly elaborate and specific nutritional needs, do not grow on a general purpose medium because they require the addition of one or more growth-supporting substances, enrichments such as additional plant or animal extracts, vitamins, or blood.
Blood agar is enriched medium which are complex media to which an extra nutrient source (such as blood in this case) is added to encourage the growth of fastidious heterotrophs.
Blood Agar, and trypticase soy agar grows semi fastidious
It's complex because the constituent elements of the medium (enzymatic digests of casein and soybean) are present in an undefined amount, and an amount which will vary from batch to batch. Contrast this to a chemically defined medium which will always contain the exact amount of constituent.
The term respiration denotes the exchange of the respiratory gases (oxygen and carbon dioxide) between the organism and the medium in which it lives and between the cells of the body and the tissue fluid that bathes them.
A medium
A complete medium has all the nutrition that is required by a particular strain of an organism. A minimal medium only has the nutrition required by wild types of organism strains.
Oxidative
The best conditions for cultivating streptococci is a bacterium that is fastidious. It likes complex medium containing blood cultivating at 37 degrees Celsius.
undefined
Refractive index of the medium is defined as the ratio of the velocity of light in vacuum to that in the medium. No unit for refractive index.