Effect of pathogen-specific clinical mastitis on milk yield in dairy cows

Journal of Dairy Science
Y T GröhnY H Schukken

Abstract

Our objective was to estimate the effects of the first occurrence of pathogen-specific clinical mastitis (CM) on milk yield in 3071 dairy cows in 2 New York State farms. The pathogens studied were Streptococcus spp.,Staphylococcus aureus, Staphylococcus spp., Escherichia coli, Klebsiella spp., Arcanobacterium pyogenes, other pathogens grouped together, and "no pathogen isolated." Data were collected from October 1999 to July 2001. Milk samples were collected from cows showing signs of CM and were sent to the Quality Milk Production Services laboratory at Cornell University for microbiological culture. The SAS statistical procedure PROC MIXED, with an autoregressive covariance structure, was used to quantify the effect of CM and several other control variables (herd, calving season, parity, month of lactation, J-5 vaccination status, and other diseases) on weekly milk yield. Separate models were fitted for primipara and multipara, because of the different shapes of their lactation curves. To observe effects of mastitis, milk weights were divided into several periods both pre- and postdiagnosis, according to when they were measured in relation to disease occurrence. Another category contained cows without the type of CM being mod...Continue Reading

References

Feb 1, 1991·Journal of Dairy Science·H A DeluykerA S Azari
Jun 1, 1989·Journal of Dairy Science·J S HoganB L Brockett
Nov 1, 1993·The Veterinary Clinics of North America. Food Animal Practice·P M SearsH R Han
Nov 1, 1993·The Veterinary Clinics of North America. Food Animal Practice·J K Shearer, R J Harmon
Mar 9, 1999·Journal of Dairy Science·P J Rajala-SchultzC E McCulloch
Jul 1, 1999·Journal of Dairy Science·P J Rajala-SchultzC L Guard
Aug 30, 2002·Veterinary Research·Belgacem DjabriHenri Seegers
Feb 9, 2005·Preventive Veterinary Medicine·Y de HaasR F Veerkamp
Jan 1, 2011·Animal : an International Journal of Animal Bioscience·A Sadeghi-SefidmazgiP R Amer

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Citations

Dec 2, 2010·The Journal of Dairy Research·Fredrik AndersenYrjo T Gröhn
Sep 24, 2011·The Journal of Dairy Research·Päivi J Rajala-SchultzFred J Degraves
Oct 4, 2012·Animal : an International Journal of Animal Bioscience·T PritchardE Wall
Oct 12, 2007·Journal of Clinical Microbiology·Marcos A MunozRuth N Zadoks
Mar 3, 2011·Genetics, Selection, Evolution : GSE·Johann C Detilleux
Nov 23, 2006·Acta Veterinaria Scandinavica·Piret KalmusKalle Kask
May 3, 2007·The Veterinary Quarterly·T HalasaH Hogeveen
Apr 12, 2016·Journal of Dairy Science·Aili WangAndrea M Dietrich
Jun 14, 2017·Animal Health Research Reviews·Thabiso E MotaungToi J Tsilo
Jun 22, 2006·Veterinary Microbiology·Belgin DoganY H Schukken
Sep 3, 2014·PloS One·Milka P PodderKapil Tahlan
Feb 27, 2017·Preventive Veterinary Medicine·Abraham Mekibeb GetanehHenk Hogeveen
Jan 4, 2017·Journal of Dairy Science·S K KvideraL H Baumgard
Feb 7, 2017·The Journal of Veterinary Medical Science·Dai IshiyamaKazuhiro Kawai
Feb 6, 2018·Journal of Dairy Science·S Ali NaqviHerman W Barkema
Sep 18, 2017·Journal of Dairy Science·Liam Polsky, Marina A G von Keyserlingk
Sep 22, 2010·Journal of Dairy Science·S McDougallC Prosser
Nov 18, 2005·Journal of Dairy Science·S ØstergaardI C Klaas
Jul 7, 2014·Journal of Dairy Science·L Oliveira, P L Ruegg
Mar 12, 2018·Journal of Dairy Science·Hossein JamaliSimon Dufour
Sep 19, 2009·Journal of Dairy Science·B-M ThorbergK Persson Waller

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