Effects of subclinical Theileria orientalis Ikeda genotype infection on average daily gain ratios and a satisfactory rating in the breeding soundness exam in bull test stations in Virginia

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dc.contributor.authorGuynn, Sierra R.en
dc.contributor.authorCurrin, John F.en
dc.contributor.authorTodd, S. Michelleen
dc.contributor.authorGreiner, Scott P.en
dc.contributor.authorLahmers, Kevin K.en
dc.date.accessioned2024-12-16T14:17:32Zen
dc.date.available2024-12-16T14:17:32Zen
dc.date.issued2023-07-17en
dc.description.abstractTheileria orientalis Ikeda genotype is a tick borne hemoprotozo­an that typically causes economic losses in dairy and beef cattle in Australia, New Zealand and Japan. Acute clinical infections from T. orientalis Ikeda include anemia, icterus, ill-thrift and death. The acute phase of the infection has been associated with decreased libido in dairy bulls, decreased live weight gain in beef bulls and increased mortality in naïve adults and calves. A sequela to acute infections within a herd is persistent sub­clinical infections, which have been associated with decreased mean daily gain in suckling beef calves. In late 2017, T. orienta­lis Ikeda was detected in beef cattle from multiple counties in Virginia and was associated with anemia, weakness, late term abortions and death. As of 2022, T. orientalis Ikeda has been identified in beef cattle in 31 of 95 Virginia counties. Beef pro­duction, typically in naturally bred cow-calf operations, is the second largest agricultural commodity in Virginia. Central bull testing programs for performance evaluation and marketing of beef bulls has existed for over 60 years in Virginia. T. orienta­lis Ikeda was first detected at the Southwest bull test station in 2020 when screened at conclusion of the test. The objective of this study was to determine if subclinical infection with T. ori­entalis Ikeda affected the average daily gain (ADG) ratios of all bulls on test and the achievement of a satisfactory rating of the breeding soundness exam (BSE) for senior bulls.en
dc.format.extentPages 208-208en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.21423/aabppro20228681en
dc.identifier.issn1079-9737en
dc.identifier.issue55en
dc.identifier.orcidGreiner, Scott [0000-0002-0599-9891]en
dc.identifier.orcidLahmers, Kevin [0000-0002-5290-3426]en
dc.identifier.urihttps://hdl.handle.net/10919/123806en
dc.language.isoenen
dc.publisherTexas A&M University Librariesen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleEffects of subclinical <i>Theileria orientalis</i> Ikeda genotype infection on average daily gain ratios and a satisfactory rating in the breeding soundness exam in bull test stations in Virginiaen
dc.title.serialAmerican Association of Bovine Practitioners Conference Proceedingsen
dc.typeConference proceedingen
dc.typePresentationen
dc.type.dcmitypeTexten
pubs.organisational-groupVirginia Techen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciencesen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciences/School of Animal Sciencesen
pubs.organisational-groupVirginia Tech/Veterinary Medicineen
pubs.organisational-groupVirginia Tech/Veterinary Medicine/Biomedical Sciences and Pathobiologyen
pubs.organisational-groupVirginia Tech/Faculty of Health Sciencesen
pubs.organisational-groupVirginia Tech/All T&R Facultyen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen

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