Multiple tube MPN
Costs
Large quantities of culture media and glassware and large autoclave Capital costs fairly high
Accuracy
Statistically based estimate Possibly large errors especially at low levels
Field use
Needs static base
Suspended matter
May be used for turbid samples
Convenience
Large amount of material to be prepared prior to analysis and disposed of after incubation
Incubation times
Up to 48 h or 72 h
EEV 640 Env. analysis 1/52