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A volumetric method for assessing Giardia inactivation
Author(s) -
Haas Charles N.,
Hornberger Joel C.,
Anmangandla Uma,
Heath Mark,
Jacangelo Joseph G.
Publication year - 1994
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1994.tb06157.x
Subject(s) - giardia , equivalence (formal languages) , yield (engineering) , biological system , computer science , biochemical engineering , environmental science , biology , mathematics , materials science , microbiology and biotechnology , engineering , discrete mathematics , metallurgy
Based on these tests, the results of the proposed volumetric method—which has the advantage of reducing labor requirements—were indistinguishable from those of the standard method. Because the standard method of determining Giardia inactivation in disinfection tests—which involves counting dead and living organisms—can be extremely tedious, an alternative method, whereby the concentration of only viable trophozoites is estimated, is being sought. This article describes the development of such a volumetric method and its verification by comparing the results obtained with the standard and volumetric methods. This work demonstrates that the two methods yield equivalent results—at least for the disinfectants and waters examined. Whether this equivalence operates for larger‐scale concentration techniques and for different waters, disinfectants, and organisms remains open to further research.