Bovine respiratory disease complex is a major cause of illness in dairy calves. The diagnosis of active infection of the lower respiratory tract is challenging on daily basis in the absence of accurate clinical signs. Clinical scoring systems such as the Californian scoring system, are appealing but were developed without considering the imperfection of reference standard tests used for case definition. This study used a Bayesian latent class model to update Californian prediction rules. The results of clinical examination and ultrasound findings of 608 pre weaned dairy calves were used. A model accounting for imperfect accuracy of thoracic ultrasound examination was used to obtain updated weights for the clinical signs included in the Californian scoring system. There were 20 points (95% Bayesian credible intervals: 11-29) for abnormal breathing pattern, 16 points (95% BCI: 4-29) for ear drop/head tilt, 16 points (95% BCI: 9-25) for cough, 10 points (95% BCI: 3-18) for the presence of nasal discharge, 7 points (95% BCI:-1 to 8) for rectal temperature a >= 39.2 degrees C, and -1 points (95% BCI: -9 to 8) for the presence of ocular discharge. The optimal cut-offs were determined using the misclassification cost-term term (MCT) approach with different possible scenarios of expected prevalence and different plausible ratio of false negative costs/false positive costs. The predicted probabilities of active infection of the lower respiratory tract were also obtained using posterior densities of the main logistic regression model. Depending on the context, cut-off varying from 9 to 16 can minimized the MCT. The optimal cut-off decreased when expected prevalence of disease and false negative/false positive ratio increased.
机构:
Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Zagazig Univ, Fac Vet Med, Zagazig, EgyptUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Abdallah, A.
;
Hewson, J.
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Univ Guelph, Ontario Vet Coll, Dept Clin Studies, Guelph, ON, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Hewson, J.
;
Francoz, D.
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Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Francoz, D.
;
Selim, H.
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Zagazig Univ, Fac Vet Med, Zagazig, EgyptUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Selim, H.
;
Buczinski, S.
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Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Aly, Sharif S.
;
Love, William J.
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Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Love, William J.
;
Williams, Deniece R.
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Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Williams, Deniece R.
;
Lehenbauer, Terry W.
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机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Lehenbauer, Terry W.
;
Van Eenennaam, Alison
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h-index: 0
机构:
Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Van Eenennaam, Alison
;
Drake, Christiana
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h-index: 0
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Univ Calif Davis, Dept Stat, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Drake, Christiana
;
Kass, Philip H.
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Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Kass, Philip H.
;
Farver, Thomas B.
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Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
机构:
Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Buczinski, S.
;
Borris, M. E.
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Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Vankleek Hill Vet Serv, Vankleek Hill, ON, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Borris, M. E.
;
Dubuc, J.
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h-index: 0
机构:
Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
机构:
Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Zagazig Univ, Fac Vet Med, Zagazig, EgyptUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Abdallah, A.
;
Hewson, J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Guelph, Ontario Vet Coll, Dept Clin Studies, Guelph, ON, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Hewson, J.
;
Francoz, D.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Francoz, D.
;
Selim, H.
论文数: 0引用数: 0
h-index: 0
机构:
Zagazig Univ, Fac Vet Med, Zagazig, EgyptUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
Selim, H.
;
Buczinski, S.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, CanadaUniv Montreal, Dept Sci Clin, Fac Med Vet, St Hyacinthe, PQ, Canada
机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Aly, Sharif S.
;
Love, William J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Love, William J.
;
Williams, Deniece R.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Williams, Deniece R.
;
Lehenbauer, Terry W.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Lehenbauer, Terry W.
;
Van Eenennaam, Alison
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Van Eenennaam, Alison
;
Drake, Christiana
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Dept Stat, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Drake, Christiana
;
Kass, Philip H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
Kass, Philip H.
;
Farver, Thomas B.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USAUniv Calif Davis, Sch Vet Med, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
机构:
Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Buczinski, S.
;
Borris, M. E.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Vankleek Hill Vet Serv, Vankleek Hill, ON, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada
Borris, M. E.
;
Dubuc, J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, CanadaUniv Montreal, Fac Med Vet, Dept Sci Clin, St Hyacinthe, PQ J2S 2M2, Canada