Buffered Peptone Water ISO is used for pre-enriching damaged Salmonella spp. from various food sources. With the EZ-Media Dry Bag format, the entire medium preparation method takes less than 30 minutes. Just add deionized water through the “in” port and gently massage the bag to mix. There are 15 dry media bags per case. All Actero™ Universal Enrichment Media are standard, high quality formulations and ISO compliant.