Abstract
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 Giardia duodenalis and Cryptosporidium parvum using immunofluorescent microscopy. Fourteen packstock (4.6%) were shedding G. duodenalis cysts, with herd-level prevalences ranging 0-22%. Number of packstock in the corral, size of corral and density of packstock in the corral were associated with the odds of shedding G. duodenalis cysts. None of the horses had detectable C. parvum oocysts. Assuming a sensitivity of at least 43% and a specificity of 100% for our assay, the estimated maximum true prevalence of shedding of C. parvum for packstock would be ≤ 2.3% of the population. These data suggest that faecal dispersal of C. parvum on back country watersheds is unlikely with packstock.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 247-252 |
| Number of pages | 6 |
| Journal | Equine Veterinary Journal |
| Volume | 32 |
| Issue number | 3 |
| State | Published - May 2000 |
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Keywords
- Cross-sectional
- Cryptosporidium parvum
- Giardia
- Horse
ASJC Scopus subject areas
- veterinary(all)
Cite this
Cross-sectional study of faecal shedding of Giardia duodenalis and Cryptosporidium parvum among packstock in the Sierra Nevada Range. / Atwill, Edward R; McDougald, N. K.; Perea, L.
In: Equine Veterinary Journal, Vol. 32, No. 3, 05.2000, p. 247-252.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cross-sectional study of faecal shedding of Giardia duodenalis and Cryptosporidium parvum among packstock in the Sierra Nevada Range
AU - Atwill, Edward R
AU - McDougald, N. K.
AU - Perea, L.
PY - 2000/5
Y1 - 2000/5
N2 - 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 Giardia duodenalis and Cryptosporidium parvum using immunofluorescent microscopy. Fourteen packstock (4.6%) were shedding G. duodenalis cysts, with herd-level prevalences ranging 0-22%. Number of packstock in the corral, size of corral and density of packstock in the corral were associated with the odds of shedding G. duodenalis cysts. None of the horses had detectable C. parvum oocysts. Assuming a sensitivity of at least 43% and a specificity of 100% for our assay, the estimated maximum true prevalence of shedding of C. parvum for packstock would be ≤ 2.3% of the population. These data suggest that faecal dispersal of C. parvum on back country watersheds is unlikely with packstock.
AB - 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 Giardia duodenalis and Cryptosporidium parvum using immunofluorescent microscopy. Fourteen packstock (4.6%) were shedding G. duodenalis cysts, with herd-level prevalences ranging 0-22%. Number of packstock in the corral, size of corral and density of packstock in the corral were associated with the odds of shedding G. duodenalis cysts. None of the horses had detectable C. parvum oocysts. Assuming a sensitivity of at least 43% and a specificity of 100% for our assay, the estimated maximum true prevalence of shedding of C. parvum for packstock would be ≤ 2.3% of the population. These data suggest that faecal dispersal of C. parvum on back country watersheds is unlikely with packstock.
KW - Cross-sectional
KW - Cryptosporidium parvum
KW - Giardia
KW - Horse
UR - http://www.scopus.com/inward/record.url?scp=0034186068&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034186068&partnerID=8YFLogxK
M3 - Article
C2 - 10836481
AN - SCOPUS:0034186068
VL - 32
SP - 247
EP - 252
JO - Equine veterinary journal. Supplement
JF - Equine veterinary journal. Supplement
SN - 2042-3306
IS - 3
ER -