TY - JOUR
T1 - Environmental load of Cryptosporidium parvum oocysts from cattle manure in feedlots from the central and western Uited Sates
AU - Atwill, Edward R
AU - Pereira, Maria Das Gracas C
AU - Herrera Alonso, L.
AU - Elmi, Cyrus
AU - Epperson, William B.
AU - Smith, Robert
AU - Riggs, Walter
AU - Carpenter, Linda V.
AU - Dargatz, David A.
AU - Hoar, Bruce
PY - 2006/1
Y1 - 2006/1
N2 - The first step in assessing the risk of water contamination by Cryptosporidium parvum oocysts from feedlot cattle (Bos taurus) production systems is to quantify the number of C. parvum oocysts present in the fecal material deposited by feedlot cattle. Our primary objective for this project was to estimate the daily environmental load of C. parvum oocysts in fecal material deposited by feedlot cattle from across the central and western USA. Our secondary goal was to genotype isolates of C. parvum from feedlot cattle to help facilitate proper identification of mammalian sources of waterborne C. parvum. Based on 5274 fecal samples from 22 feedlots in seven states (California, Washington, Colorado, Oklahoma, Texas, Nebraska, and South Dakota), we estimated a point prevalence of C. parvum of 0.99 to 1.08% in fecal material from feedlot pens from a wide range of climates and a diverse range of feedlot management systems. On average, fresh fecal material from throughout feedlot systems (recent arrivals to nearing slaughter) contained about 1.3 to 3.6 oocysts/g feces, which roughly translates to about 2.8 × 104 to 1.4 × 105 oocysts/animal per day.
AB - The first step in assessing the risk of water contamination by Cryptosporidium parvum oocysts from feedlot cattle (Bos taurus) production systems is to quantify the number of C. parvum oocysts present in the fecal material deposited by feedlot cattle. Our primary objective for this project was to estimate the daily environmental load of C. parvum oocysts in fecal material deposited by feedlot cattle from across the central and western USA. Our secondary goal was to genotype isolates of C. parvum from feedlot cattle to help facilitate proper identification of mammalian sources of waterborne C. parvum. Based on 5274 fecal samples from 22 feedlots in seven states (California, Washington, Colorado, Oklahoma, Texas, Nebraska, and South Dakota), we estimated a point prevalence of C. parvum of 0.99 to 1.08% in fecal material from feedlot pens from a wide range of climates and a diverse range of feedlot management systems. On average, fresh fecal material from throughout feedlot systems (recent arrivals to nearing slaughter) contained about 1.3 to 3.6 oocysts/g feces, which roughly translates to about 2.8 × 104 to 1.4 × 105 oocysts/animal per day.
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U2 - 10.2134/jeq2005.0099
DO - 10.2134/jeq2005.0099
M3 - Article
C2 - 16391291
AN - SCOPUS:31844444665
VL - 35
SP - 200
EP - 206
JO - Journal of Environmental Quality
JF - Journal of Environmental Quality
SN - 0047-2425
IS - 1
ER -