Recovery of Giardia cysts from water
1983; Elsevier BV; Volume: 17; Issue: 11 Linguagem: Inglês
10.1016/0043-1354(83)90031-3
ISSN1879-2448
AutoresBob Holman, Floyd J. Frost, Byron Plan, Karen Fukutaki, Walter Jakubowski,
Tópico(s)Energy and Environmental Systems
ResumoMethods for the recovery of Giardia cysts from large volume (1900 l.) water samples were experimentally examined in the laboratory and applied to 22 surface water supplies around Washington state. Orlon yarn-wound filters (7 and 1 μm porosity) were compared, with higher cyst recovery rates observed for 1 μm filters. For each experiment, half the recovered material was processed through a series of screens while the other half was processed through an algae (Foerst) centrifuge. Both methods recovered cysts from 1900 l. water samples containing as few as 6000 cysts, with higher recovery rates observed for the algae centrifuge. Cysts were recovered more often from surface water sources implicated in outbreaks (3 of 4) than from sources not implicated in known outbreaks (2 of 18).
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