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Year : 2011
Tome : 162
Volume : 12
Pages : 563-573
Title : Pulmonary rhodococcosis in foals: risk factors related to horse husbandry in France
Authors : J. TAPPREST, C. LAUGIER, C. SEVIN, N. FOUCHER, F. DUQUESNE, M. HENRY-AMAR
Summary : The current case-control study was designed to highlight Rhodococcus equi pneumonia risk factors linked to the farm structure and husbandry practices in Basse-Normandie and to compare these results with those obtained from research in other countries. Data from 93 farms (29 endemically affected farms and 69 unaffected farms) were collected and compared by univariate analysis then conditional logistic regression analysis. In rhodococcosis affected farms, a global analysis model evidenced 4 main risk factors (reaching or ex- ceeding of the maximal broodmare capacity, late births (in May and/or June), the shared use of medical (ultrasound and/or insemination) facilities by both transient and resident mares and the potential foal exposure to dust). The in- fluence of exceeding maximal broodmare capacity may confirm the recognized impact of animal population on the possible R. equi infection. Fostering early foalings has been an usual recommendation for prevention of R. equi. The shared use of medical facilities reflects animal mixing and may be related to the contagious aspect of R. equi pneumonia. Potential foal exposition to dust, doubtless correlated to the concept of an infectious challenge by virulent R. equi in the air, seems to be the preponderant risk factor here. Further studies are needed to quantify the virulent R. equi aerosol forms in the foal environ- ment in affected and control farms in order to propose some prophylactic ef- ficient measures.
Keywords : Rhodococcosis, Rhodococcus equi, foal, epi- demiological study, univariate analysis, multivariate analysis, risk factor, France
Correspondence : J. TAPPREST
Adress : Laboratoire de Pathologie Equine, Anses-Dozul, RD 675, 14430 Goustranville, FRANCE - Corresponding author: jackie.tapprest@anses.fr
Link : pdf

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