“…Typically, the term ‘biological fluids’ is taken as a synonym to ‘body fluids’ or ‘biofluids’ that correspond to liquids originating from inside the bodies of living people, such as urine, blood, saliva, sweat, cerebrospinal fluid, mucus, etc. However, this concept can be extended to include water washouts and aqueous extracts of the homogenates of various organs and tissues of animals (Kutyshenko et al, 2007; Kutyshenko et al, 2008a; Kutyshenko et al, 2008b) and plants (Molchanov et al, 2012). Addition of these somewhat artificial biological fluids leads to the noticeable increase in the variability of experimental material suitable for comprehensive analysis and produces substantial information related not only to the organs under study, but also to the interactions of these organs with the remaining organism and with specific microorganisms.…”