[ A collection of microorganisms, pathogens; a collection of bacteria, fungi, protozoa and viruses; bacteria, fungi, protozoa and viruses, for the testing of substances; bacteria, fungi, protozoa and viruses, for the determination of the activity of chemical and biological substances in testing systems to influence the growth or activity of such bacteria, fungi, protozoa and viruses; bacteria, fungi, protozoa and viruses, for the study of biological systems and the relationship between the mi...