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Abstract

The objective of this study was to evaluate management practices and environmental factors associated with cryptosporidiosis and giardiasis in preweaned heifer calves on US dairy operations. This study was conducted as part of the calf component of the National Animal Health Monitoring System's...

Author(s)
Urie, N. J.; Lombard, J. E.; Shivley, C. B.; Adams, A. E.; Kopral, C. A.; Santin, M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 10, pp 9199-9213
Abstract

To determine the species and distribution of Cryptosporidium in weaned beef calves in the United States, fecal specimens were collected from 819 cattle between 6 and 18 months of age from 49 operations in 20 states (Alabama, California, Colorado, Georgia, Idaho, Iowa, Kansas, Louisiana,...

Author(s)
Fayer, R.; Santín, M.; Dargatz, D.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 170, 3/4, pp 187-192
Abstract

A cross-sectional study was performed to evaluate the relationship between herd-level management and biosecurity practices in a sample of California's beef cow-calf operations, and the estimated within-herd prevalence of antibodies to Neospora caninum, Anaplasma marginale, and the persistent...

Author(s)
Hoar, B. R.; Bell, T. C.; Villanueva, V.; Davy, J.; Forero, L.; Maas, J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2008, 42, 2, pp 132-138
Abstract

Producers were surveyed and 1 323 cattles were sampled to describe the prevalence of 5 types of internal parasites in California's beef cattle and to identify management factors important to parasite control. Majority of cattles shredded parasite eggs/oocysts during spring. These were principally...

Author(s)
Drake, D. J.; Atwill, E. R.; Phillips, R.; Johnson, E.
Publisher
Division of Agriculture and Natural Resources, University of California, Oakland, USA
Citation
California Agriculture, 2001, 55, 2, pp 28-32
Abstract

Faecal samples collected from periparturient Holstein cows were examined by direct fluorescent antibody (DFA) and acid-fast (AF) assays for C. parvum oocysts. Faecal samples collected from calves every other day from age 7 to 21 days were also tested. Topsoil from close-up and maternity pens and...

Author(s)
Atwill, E. R.; Harp, J. A.; Jones, T.; Jardon, P. W.; Checel, S.; Zylstra, M.
Citation
American Journal of Veterinary Research, 1998, 59, 9, pp 1116-1121
Abstract

Faecal shedding of C. parvum was evaluated in 38 beef cow-calf herds (865 calves and 456 adults) from California between February and August 1995. Faecal specimens were examined for C. parvum oocysts using immunofluorescent microscopy. Associations between age, geographical region, month of...

Author(s)
Atwill, E. R.; Johnson, E.; Klingborg, D. J.; Veserat, G. M.; Markegard, G.; Jensen, W. A.; Pratt, D. W.; Delmas, R. E.; George, H. A.; Forero, L. C.; Philips, R. L.; Barry, S. J.; McDougald, N. K.; Gildersleeve, R. R.; Frost, W. E.
Citation
American Journal of Veterinary Research, 1999, 60, 4, pp 420-425
Abstract

134 Holstein calves on a dairy farm where cryptosporidiosis was endemic were randomly assigned to 1 of 3 treatment groups at birth. Calves in the vaccine group received an oral dose of C. parvum vaccine within several hours of birth. Calves in the bacteria group received an oral dose of lactic...

Author(s)
Harp, J. A.; Jardon, P.; Atwill, E. R.; Zylstra, M.; Checel, S.; Goff, J. P.; Simone, C. de
Citation
American Journal of Veterinary Research, 1996, 57, 11, pp 1586-1588
Abstract

Of the 405 calves enrolled between June 1992 and December 1994 on 2 California dairies (A and B), 30.6% (85/278) and 53.5% (68/127), respectively, were seropositive precolostrally to N. caninum, as determined by ELISA. Adult cow seroprevalence at calving was 36.0% (82/228) for dairy A, and 57.9%...

Author(s)
Paré, J.; Thurmond, M. C.; Hietala, S. K.
Citation
Canadian Journal of Veterinary Research, 1996, 60, 2, pp 133-139
Abstract

Cattle on 2 typically managed drylot dairy farms in California, USA, were serologically monitored from birth to 4 years of age to characterize congenital and postnatal Neospora caninum transmission. Of 456 calves enrolled, 284 were classified as N. caninum-negative and 172 were classified as N....

Author(s)
Hietala, S. K.; Thurmond, M. C.
Citation
International Journal for Parasitology, 1999, 29, 10, pp 1669-1676
Abstract

A total of 41 cows and their calves were used to evaluate the effect of midsummer treatment (August 3) with ivermectin (IVOMEC) in Oklahoma, USA. August-October weight gains in calves (119 lbs in 21 controls compared with 143 lbs in 20 treated animals) were significantly improved by treatment....

Author(s)
Smith, S. C.; Kelley, J. W.
Citation
Animal Science Research Report, Agricultural Experiment Station, Oklahoma State University, 1991, MP-134, pp 201-203

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