{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T02:14:38Z","timestamp":1791252878439,"version":"4.1.0"},"reference-count":50,"publisher":"American Society for Microbiology","issue":"15","license":[{"start":{"date-parts":[[2011,8,1]],"date-time":"2011-08-01T00:00:00Z","timestamp":1312156800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Appl Environ Microbiol"],"published-print":{"date-parts":[[2011,8]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            <jats:named-content content-type=\"genus-species\">Giardia lamblia<\/jats:named-content>\n            is an important waterborne pathogen and is among the most common intestinal parasites of humans worldwide. Its fecal-oral transmission leads to the presence of cysts of this pathogen in the environment, and so far, quantitative rapid screening methods are not available for various matrices, such as surface waters, wastewater, or food. Thus, it is necessary to establish methods that enable reliable rapid detection of a single cyst in 10 to 100 liters of drinking water. Conventional detection relies on cyst concentration, isolation, and confirmation by immunofluorescence microscopy (IFM), resulting in low recoveries and high detection limits. Many different immunomagnetic separation (IMS) procedures have been developed for separation and cyst purification, so far with variable but high losses of cysts. A method was developed that requires less than 100 min and consists of filtration, resuspension, IMS, and flow cytometric (FCM) detection. MACS MicroBeads were used for IMS, and a reliable flow cytometric detection approach was established employing 3 different parameters for discrimination from background signals, i.e., green and red fluorescence (resulting from the distinct pattern emitted by the fluorescein dye) and sideward scatter for size discrimination. With spiked samples, recoveries exceeding 90% were obtained, and false-positive results were never encountered for negative samples. Additionally, the method was applicable to naturally occurring cysts in wastewater and has the potential to be automated.\n          <\/jats:p>","DOI":"10.1128\/aem.00416-11","type":"journal-article","created":{"date-parts":[[2011,6,18]],"date-time":"2011-06-18T03:47:32Z","timestamp":1308368852000},"page":"5420-5427","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":32,"title":["Rapid Detection and Enumeration of Giardia lamblia Cysts in Water Samples by Immunomagnetic Separation and Flow Cytometric Analysis"],"prefix":"10.1128","volume":"77","author":[{"given":"Hans-Anton","family":"Keserue","sequence":"first","affiliation":[{"name":"Eawag, Swiss Federal Institute for Aquatic Science and Technology, \u00dcberlandstr. 133, P.O. Box 611, CH-8600 D\u00fcbendorf, Switzerland"},{"name":"Federal Office of Public Health (FOPH), Schwarzenburgstrasse 165, CH-3097 Liebefeld, Switzerland"},{"name":"Institute of Biogeochemistry and Pollutant Dynamics (IBP), ETH Z\u00fcrich, Universit\u00e4tsstrasse 16, 8092 Z\u00fcrich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans Peter","family":"F\u00fcchslin","sequence":"additional","affiliation":[{"name":"Eawag, Swiss Federal Institute for Aquatic Science and Technology, \u00dcberlandstr. 133, P.O. Box 611, CH-8600 D\u00fcbendorf, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Egli","sequence":"additional","affiliation":[{"name":"Eawag, Swiss Federal Institute for Aquatic Science and Technology, \u00dcberlandstr. 133, P.O. Box 611, CH-8600 D\u00fcbendorf, Switzerland"},{"name":"Institute of Biogeochemistry and Pollutant Dynamics (IBP), ETH Z\u00fcrich, Universit\u00e4tsstrasse 16, 8092 Z\u00fcrich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_3_2_2","unstructured":"Reference deleted."},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.2307\/3285681"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1462-5822.2001.00094.x"},{"key":"e_1_3_3_5_2","first-page":"430","article-title":"Giardia cysts in wastewater treatment plants in Italy","volume":"21","author":"Caccio S. M.","year":"2003","unstructured":"CaccioS. M. De GiacomoM. AulicinoF. A. PozioE.. 2003. Giardia cysts in wastewater treatment plants in Italy. Appl. Environ. Microbiol. 21:430\u2013437.","journal-title":"Appl. Environ. 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