{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T02:55:58Z","timestamp":1784170558453,"version":"3.55.0"},"reference-count":29,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2010,1,5]],"date-time":"2010-01-05T00:00:00Z","timestamp":1262649600000},"content-version":"vor","delay-in-days":3536,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["beva.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Equine Veterinary Journal"],"published-print":{"date-parts":[[2000,5]]},"abstract":"<jats:title>Summary<\/jats:title>\n                  <jats:p>\n                    Faecal specimens from 305 horses and mules used as packstock at one of 17 commercial or governmental (National Park Service, US Forest Service) operations were examined for\n                    <jats:italic>Giardia duodenalis<\/jats:italic>\n                    and\n                    <jats:italic>Cryptosporidium parvum<\/jats:italic>\n                    using immunofluorescent microscopy. Fourteen packstock (4.6%) were shedding\n                    <jats:italic>G. duodenalis<\/jats:italic>\n                    cysts, with herd\u2010level prevalences ranging 0\u201322%. Number of packstock in the corral, size of corral and density of packstock in the corral were associated with the odds of shedding\n                    <jats:italic>G. duodenalis<\/jats:italic>\n                    cysts. None of the horses had detectable\n                    <jats:italic>C. parvum<\/jats:italic>\n                    oocysts. Assuming a sensitivity of at least 43% and a specificity of 100% for our assay, the estimated maximum true prevalence of shedding of\n                    <jats:italic>C. parvum<\/jats:italic>\n                    for packstock would be \u2264 2.3% of the population. These data suggest that faecal dispersal of\n                    <jats:italic>C. parvum<\/jats:italic>\n                    on back country watersheds is unlikely with packstock.\n                  <\/jats:p>","DOI":"10.2746\/042516400776563545","type":"journal-article","created":{"date-parts":[[2007,4,12]],"date-time":"2007-04-12T19:03:27Z","timestamp":1176404607000},"page":"247-252","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Cross\u2010sectional study of faecal shedding of\n                    <i>Giardia duodenalis<\/i>\n                    and\n                    <i>Cryptosporidium parvum<\/i>\n                    among packstock in the Sierra Nevada Range"],"prefix":"10.1111","volume":"32","author":[{"given":"E. R.","family":"Atwill","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N. 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