Definicija: A culture that contains only one microbial species.
Vir definicije: http://cancerweb.ncl.ac.uk
Vir - besedilo: 31992L0069 Commission Directive 92/69/EEC of 31 July 1992 adapting to technical progress for the seventeenth time Council Directive 67/548/EEC on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances
Vir - besedilo: 31992L0069 Direktiva Komisije 92/69/EGS z dne 31. julija 1992 o sedemnajsti prilagoditvi tehničnemu napredku Direktive Sveta 67/548/EGS o približevanju zakonov in drugih predpisov v zvezi z razvrščanjem, pakiranjem in označevanjem nevarnih snovi, C.3, Dodatek 1
Vir - besedilo: Mikrobiološki slovar, Slovensko mikrobiološko društvo, 1994