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Since 1947, Hach Company has manufactured and distributed analytical instruments, test kits, and reagents for testing the quality of water and aqueous solutions, with products for lab, process, and field.
Pathoscreen Medium is a product that tests the quality of water in terms of the presence of certain bacteria: Salmonella, Citrobacter, Proteus, Edwardsiella, and some species of Klebsiella in drinking water, surface water, and recreational waters.
===Construction, operations and maintenance===
The pathoscreen medium comes in pillows (like sachets) with enough powder to test 100ml of water. The sample water is put in sterilized bottles, and the contents of PathoScreen Medium powder pillow is added and left for 24 hours. The change in colour indicates the safety of the water. For more details read the attached document.
In the time that the powder is working, the sample should be stored at a temperature between 25 and 35 degrees Celsius.
===Costs===The cost of the field kit, including enough media for 100 presence-absence tests using 20 mL sample, or 20 MPN tests. Reusable glass vials, and foil-pillowed media, increases shelflifeshelf life, varies per location and nearest available distributor. To order it go to [http://www.akvohach.org hach com Hach website].
===Manuals, videos, and links===* [http://www.sopachach.orgcom/tikipathoscreen-field-download_file.phptest-kit/product?fileIdid=1194 Analytical Procedure Pathoscreen 7640249603 PathoScreen Field Test Kit] <br>* Hach: [http://www.hach.com/fmmimghachquick.search-quick.search.jsa?/CODE%3AL7015547%7C1 keywords=indicator+organisms Indicator Organisms] and or the [http://www.hach.comhome page].