This video presents the procedure for prepatation of the host bacteria working culture stock and the bacteriophage control aliquots as culture reference materials for enumeration of somatic coliphages.

Recorded in the laboratories of the MARS group in the department of Genetics, Microbiology and Statistics, Faculty of Biology of University of Barcelona. Funded by the MARS group, the Water Research Institute of the University of Barcelona and the Environmental Laboratory, City of Santa Cruz (California, USA).