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dc.contributor.authorTodd, C. G.
dc.contributor.authorMcGee, Mark
dc.contributor.authorTiernan, Katie
dc.contributor.authorCrosson, Paul
dc.contributor.authorO’Riordan, Edward G.
dc.contributor.authorMcClure, J.
dc.contributor.authorLorenz, Ingrid
dc.contributor.authorEarley, Bernadette
dc.date.accessioned2020-06-17T12:02:19Z
dc.date.available2020-06-17T12:02:19Z
dc.date.issued2018-07-25
dc.identifier.citationTodd, C., McGee, M., Tiernan, K., Crosson, P., O’Riordan, E., McClure, J., Lorenz, I. and Earley, B. An observational study on passive immunity in Irish suckler beef and dairy calves: Tests for failure of passive transfer of immunity and associations with health and performance. Preventive Veterinary Medicine, 2018, 159, 182-195. doi: https://dx.doi.org/10.1016/j.prevetmed.2018.07.014en_US
dc.identifier.urihttp://hdl.handle.net/11019/2010
dc.descriptionpeer-fundeden_US
dc.description.abstractThe study objectives were to: 1) evaluate the diagnostic performance of passive immunity tests for classification of failure of passive transfer (FPT) risk, based on their relationships with calf health and performance, and 2) describe the epidemiology of morbidity and mortality in suckler beef and dairy calves under Irish conditions. A total of 1392 suckler beef calves (n = 111 farms) and 2090 dairy calves (84 farms) were included in this observational study. Blood samples were collected by jugular venipuncture. Serum samples were analysed for total IgG concentration using an ELISA assay, total protein concentration by clinical analyser (TP – CA), globulin concentration, zinc sulphate turbidity (ZST) units, total solids percentage by Brix refractometer (TS – BRIX), and total protein concentration by digital refractometer (TP – DR). Crude and cause-specific morbidity, all-cause mortality, and standardised 205-day body weight (BW) were determined. Generalised linear mixed models were used to evaluate associations between suckler beef and dairy calves for morbidity, mortality, growth and passive immunity. Receiver operating characteristic (ROC) curves were constructed to determine optimal test cut-offs for classification of health and growth outcomes. Overall, 20% of suckler beef and 30% of dairy calves were treated for at least one disease event by 6 mo. of age. Suckler beef calves had greater odds of bovine respiratory disease (BRD; odds ratio (OR), 95% confidence interval (CI): 2.8, 1.2–6.5, P = 0.01), navel infection (5.1, 1.9–13.2, P < 0.001), and joint infection/lameness (3.2, 1.3–7.8, P = 0.01) during the first 6 mo. of life than dairy calves. In addition, from birth to 6 mo. of age, suckler beef calves had greater rates of navel infection (incidence rate ratio (IRR), 95% CI: 3.3, 1.3–8.4, P = 0.01), but decreased rates of diarrhoea (0.9, 0.2–0.9, P = 0.03) compared to dairy calves. Optimal test cut-offs for classification of morbidity and mortality outcomes in suckler beef calves ranged from 8 to 9 mg/ml ELISA, 56 to 61 g/l TP – CA, 26 to 40 g/l globulin, 12 to 18 ZST units, 8.4% TS – BRIX, and 5.3 to 6.3 g/dl TP – DR. Optimal test cut-offs for classification of morbidity and growth outcomes in dairy calves ranged from 10 to 12 mg/ml ELISA, 57 to 60 g/l TP – CA, 29 to 34 g/l globulin, 19 ZST units, 7.8 to 8.4% TS – BRIX, and 5.7 to 5.9 g/dl TP – DR.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofseriesPreventive Veterinary Medicine;Vol. 159
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectcalfen_US
dc.subjectdairyen_US
dc.subjectsuckler beefen_US
dc.subjectmorbidityen_US
dc.subjectpassive immunityen_US
dc.subjectmortalityen_US
dc.titleAn observational study on passive immunity in Irish suckler beef and dairy calves: Tests for failure of passive transfer of immunity and associations with health and performanceen_US
dc.typeArticleen_US
dc.embargo.terms2019-07-25en_US
dc.identifier.doihttps://dx.doi.org/10.1016/j.prevetmed.2018.07.014
dc.contributor.sponsorDepartment of Agriculture, Food and the Marineen_US
dc.contributor.sponsorGrantNumber11/S/131en_US
refterms.dateFOA2019-07-25T00:00:00Z


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