ORBi: Theron Léonard - Mastitis risk indicators assessed through a germ specific epidemiological model in southern Belgium

Reference : Mastitis risk indicators assessed through a germ specific epidemiological model in south...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Veterinary medicine & animal health
	To cite this reference:	http://hdl.handle.net/2268/100144

Title :	Mastitis risk indicators assessed through a germ specific epidemiological model in southern Belgium
Language :	English
Author, co-author :	Theron, Léonard [Université de Liège - ULg > Département clinique des animaux de production (DCP) > Thériogenologie des animaux de production >]
	Sustronck, Bart [ > > ]
	Bertozzi, Carlo [ > > ]
	Hanzen, Christian [Université de Liège - ULg > Département clinique des animaux de production (DCP) > Thériogenologie des animaux de production >]
Publication date :	7-Sep-2011
Page number :	A1
On invitation :	No
Audience :	International
Event name :	6th European Congress of Bovine Health Management
Event date :	7-9 septembre 2011
Event organizer :	Société Belge de Buiatrie
Event place (city) :	Liege
Event country :	Belgique
Keywords :	[en] Mastitis ; Pathogens ; Risk factors ; Epidemiology ; Environment
Abstract :	[en] Bovine mastitis is the most prevalent pathology in dairy production; in order to identify herd related risk indicators, our study focused on germ-specific approach to refine known risk indicators between environmental or contagious epidemiologic models. We gathered clinical mastitis during 3 months in 21 walloon dairy farms representing 1630 Holstein cows (mean: 67; SD: 18). Farmers were interrogated by a questionnaire about their main practices and basic mastitis knowledge questions. Quarters and severity were recorded, sampled for bacteriology at day 0 and day 21 during 3 months. Individual cell counts were also recorded. Risk analysis included Odds ratio calculation (OR) and multivariate regression. The average prevalence of mastitis on the study was 3.25% (min 0.3%, max : 11.2%, SD : 2.8%) which is coherent with previous epidemiological studies in Wallonia. 124 quarters were sampled and non-negative bacteriology shown 45% of strictly environmental pathogens, 22% of strictly contagious pathogens and 33% of mix epidemiological model pathogens. Overall risk assessment revealed that cubicles free-stall herds shown mastitis lower incidence (OR = 0.49; IC95 [0.34-0.72]). Surprisingly, post-dipping appeared as an overall positive risk indicator for mastitis prevalence (OR =2.13; IC95 [2,13-3,39]). The germ specific approach revealed that Post-dipping was present in low incidence herds with contagious models (OR=0.29; IC95 [0.12-0.71]) and that the type of pathogen model is an interaction in post-dipping risk analysis (Breslow-Day test p<0.0001), whereas housing had no interaction with the model (p=0.33). In this way of categorizing variables, one is able to identify overall risk indicators or germ-specific model. This can lead to more accurate advices in farm consulting.
Funders :	Intervet-Schering Plough Animal Health
Name of the research project :	Mammipack
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/100144

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Open access	ECBHM THERON Mastitis risk indicators assessed through a germ specific approach2.pdf		Author preprint	171.37 kB	View/Open

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Open access	Mastitis_risk_indicatorsPOSTER_ECBHM.pdf		-	688.27 kB	View/Open

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