inoculum
of 106 cells of S. newport was added to each
flask (Fig. lb). This inhibition was measurable
over the 7-h test period when the number of
viable cells in the inoculum was between 105 and
108 per flask. The poly H serum failed to inhibit
''002 production if the inoculum was >108 cells
per flask. An inoculum of this size did not present
a problem as even pure cultures of Salmonella
in selective enrichment media did not exceed
3 x 108 viable cells per ml, giving a maximum
inoculum of