Diagnosing intramammary infections: evaluating expert opinions on the definition of intramammary infection using conjoint analysis

Journal of Dairy Science
S AndersenMastitis Research Workers' Conference

Abstract

The primary purpose of this study was to develop a set of criteria to serve as a pseudo-gold standard for what constitutes an intramammary infection using data from 3 consecutive quarter milk samples taken 1 wk apart. Data from lactating cows in 90 dairy herds in 4 Canadian provinces were used to generate the data sets (profiles) used in the conjoint analysis to elicit expert opinions on the topic. The experts were selected from the participants (n=23) in the 2007 Mastitis Research Workers' Conference in Minneapolis and from a series of mastitis laboratory courses for bovine practitioners (n=25) in the Netherlands. Three-week udder quarter profiles with specific combinations of somatic cell count, bacterial species isolated, and plate colony count were selected and included in the conjoint analysis based on the desire to achieve even distributions in the categories of 6 constructed variables. The participants were presented with 3 sets of cards with 20 cards in each set. On each card, they were asked to assign a probability of infection on the middle day (test day) in the 3-wk profile. Depending on the set of cards, they were asked only to be concerned with the probability of infection with coagulase-negative staphylococci, Esc...Continue Reading

References

Apr 5, 2001·Journal of Dairy Science·R N ZadoksY H Schukken
Aug 30, 2002·Veterinary Research·Belgacem DjabriHenri Seegers
Oct 15, 2003·Veterinary Research·Ynte H SchukkenRuben N Gonzalez

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Citations

Apr 6, 2012·The Veterinary Quarterly·Gerrit KoopTine van Werven
Jun 28, 2011·Journal of Dairy Science·C Pinzón-Sánchez, P L Ruegg
Aug 23, 2011·Journal of Dairy Science·C B Malek dos ReisM V Santos
Dec 25, 2010·Journal of Dairy Science·I R DohooUNKNOWN Mastitis Research Workers' Conference
Dec 29, 2012·Preventive Veterinary Medicine·L L GustafsonM D Remmenga
Jan 21, 2014·Preventive Veterinary Medicine·Claudina VissioAlejandro José Larriestra
Mar 1, 2012·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Jennifer B WalkerFred J DeGraves
Apr 5, 2020·Animals : an Open Access Journal From MDPI·Alfonso ZecconiLucio Zanini
Aug 21, 2018·Journal of Dairy Science·A-M HeikkiläS Taponen
Apr 2, 2020·Journal of Dairy Science·F N SouzaA M M P Della Libera
Oct 17, 2020·Veterinary World·S M Mostafizur Rahaman SumonMd Taohidul Islam
Nov 29, 2020·Journal of Dairy Science·Saranya G NarayanaHerman W Barkema
Jun 12, 2017·Research in Veterinary Science·P B A SimõesR N Zadoks

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