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Economic impact of mastitis in dairy cows

Nielsen, Christel (2009). Economic impact of mastitis in dairy cows. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2009:29
ISBN 978-91-86195-76-2
[Doctoral thesis]

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This thesis aims to assess the economic loss associated with clinical (CM) and subclinical (SCM) mastitis under current Swedish farming conditions. Stochastic simulation was used to investigate the impact of mastitis on technical and economic results of a 150-cow dairy herd. The yearly avoidable cost of mastitis, assuming that the initial incidence (32 and 33 cases of CM and SCM per 100 cow-years, respectively) could be reduced by 50%, was estimated at €8 095. This figure corresponded to 5% of the economic net return for the herd given the initial incidence of mastitis. Expressed as an average per cow/year, the avoidable cost of mastitis was estimated at €54. The economic loss associated with mastitis could not be reduced by discarding milk with high somatic cell count, because this resulted in a substantial decrease of the volume of sold milk which was not offset by the increase in milk price. Cases of CM and SCM were on average associated with an average economic loss of €275 and €60, respectively. Reduced milk production constituted the major cost component of the economic loss caused by mastitis. The magnitude of yield loss associated with mastitis occurring in different stages of lactation was assessed using mixed linear models. The dataset was collected in a research herd between 1987 and 2004, and consisted of weekly test-day records sampled in 1200 lactations. The most extensive yield loss was estimated when CM developed in early lactation and when SCM (modelled by means of increased somatic cell count) occurred in late lactation. The 305-day yield loss associated with CM varied between 0 and 705 kg milk in primiparous cows and between 0 and 902 kg milk in multiparous cows, depending on lactation week at onset. Most cases of CM developed in the first week of lactation and resulted in a yield loss of 578 and 782 kg milk in primiparous and multiparous cows, respectively. Daily yield loss at an SCC of 500 000 cells/ml ranged from 0.7 to 2.0 kg milk in primiparous cows and from 1.1 to 3.7 kg milk in multiparous cows. The yield loss in an average 305-day lactation affected by SCM was 150 and 450 kg milk in primiparous and multiparous cows, respectively.

Authors/Creators:Nielsen, Christel
Title:Economic impact of mastitis in dairy cows
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2009
Number of Pages:81
ALLI Hagnestam, C., Emanuelson, U. and Berglund, B. (2007). Yield Losses Associated with Clinical Mastitis Occurring in Different Weeks of Lactation. Journal of Dairy Science 90(5), 2260-2270. II Hagnestam-Nielsen, C. and Østergaard, S. (2009). Economic Impact of Clinical Mastitis in a Dairy Herd Assessed by Stochastic Simulation using Different Methods to Model Yield Losses. Animal 3(2), 315-328. III Hagnestam-Nielsen, C., Emanuelson, U., Berglund, B. and Strandberg, E. (2009). Relationship Between Somatic Cell Count and Milk Yield in Different Stages of Lactation. Journal of Dairy Science, accepted, doi:10.3168/jds.2008-1719. IV Hagnestam-Nielsen, C., Emanuelson, U., Strandberg, E., Andersson, H.,Berglund, B. and Østergaard, S. Economic Consequences of Mastitis and Discarding Milk with High Somatic Cell Count (manuscript).
Place of Publication:Uppsala
ISBN for printed version:978-91-86195-76-2
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:dairy cows, mastitis, somatic cell count, disease control, milk yield, losses, costs, sweden
Keywords:dairy cow, mastitis, somatic cell count, yield loss, dairy herd, economic performance, discarding milk
Permanent URL:
ID Code:1968
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: Christel Nielsen
Deposited On:27 Mar 2009 00:00
Metadata Last Modified:02 Dec 2014 10:15

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