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Start Over Author "C. Paraud" Journal preventive veterinary medicine
2 results on '"C. Paraud"'

1. Cryptosporidium parvum infection and associated risk factors in dairy calves in western France

Author

M.C. Dupuy, I. Pors, M. Dumoulin, Christophe Chartier, C. Paraud, A. Delafosse, Groupement de Défense Sanitaire, Biologie, Epidémiologie et analyse de risque en Santé Animale (BIOEPAR), Institut National de la Recherche Agronomique (INRA), Oniris, UMR BioEpAR, PRES Université Nantes Angers Le Mans (UNAM), Laboratoire de Niort, and Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)

Subjects
Diarrhea, Veterinary medicine, Databases, Factual, 040301 veterinary sciences, [SDV]Life Sciences [q-bio], animal diseases, Western France, Cattle Diseases, Cryptosporidiosis, Biology, Article, 030308 mycology & parasitology, 0403 veterinary science, Feces, 03 medical and health sciences, Animal science, Food Animals, Surveys and Questionnaires, parasitic diseases, Prevalence, medicine, Animals, Dairy calves, Cryptosporidium parvum, 2. Zero hunger, 0303 health sciences, Mortality rate, Incidence (epidemiology), Oocysts, 04 agricultural and veterinary sciences, Odds ratio, biology.organism_classification, Breed, Animals, Suckling, Dairying, Risk factors, Multivariate Analysis, Colostrum, Cattle, Animal Science and Zoology, France, medicine.symptom
Abstract

International audience; This study was conducted to determine the prevalence and risk factors for Cryptosporidium infection in calf neonates on dairy farms in Normandy. Fecal samples were randomly collected between July 2010 and September 2011 from 968 calves (7-21 days old) on 97 farms. Up to 10 calves were selected and sampled per farm, and feces examined for oocysts by microscopy. C. parvum oocyst shedding was scored semi-quantitatively (0-5). A questionnaire about calf-level care and management was completed, and mortality rates were obtained from the French national registration database (BDNI). Bivariable and multivariable analyses of potential risk factors for C. parvum oocyst shedding were conducted using generalized estimating equation (GEE) models (family=Binomial).Overall, 402 out of 968 calves (41.5%) were positive for oocysts, and 25.1% of animals had a shedding score >2. Seven of the 97 farms (7%) were negative for oocysts in all fecal samples. At the time of collection, 375 calves (39%) had diarrhea, and its prevalence strongly correlated with the score for C. parvum oocyst shedding (p

Published
2015

2. Cryptosporidium parvum infection and associated risk factors in dairy calves in western France.

Author

Delafosse A, Chartier C, Dupuy MC, Dumoulin M, Pors I, and Paraud C

Subjects
Animals, Animals, Suckling, Cattle, Cattle Diseases mortality, Cryptosporidiosis mortality, Cryptosporidium parvum isolation & purification, Dairying, Databases, Factual, Diarrhea parasitology, Diarrhea veterinary, Feces parasitology, France epidemiology, Multivariate Analysis, Oocysts parasitology, Prevalence, Risk Factors, Surveys and Questionnaires, Cattle Diseases epidemiology, Cattle Diseases parasitology, Cryptosporidiosis epidemiology, Cryptosporidiosis parasitology
Abstract

This study was conducted to determine the prevalence and risk factors for Cryptosporidium infection in calf neonates on dairy farms in Normandy. Fecal samples were randomly collected between July 2010 and September 2011 from 968 calves (7-21 days old) on 97 farms. Up to 10 calves were selected and sampled per farm, and feces examined for oocysts by microscopy. C. parvum oocyst shedding was scored semi-quantitatively (0-5). A questionnaire about calf-level care and management was completed, and mortality rates were obtained from the French national registration database (BDNI). Bivariable and multivariable analyses of potential risk factors for C. parvum oocyst shedding were conducted using generalized estimating equation (GEE) models (family=Binomial).Overall, 402 out of 968 calves (41.5%) were positive for oocysts, and 25.1% of animals had a shedding score >2. Seven of the 97 farms (7%) were negative for oocysts in all fecal samples. At the time of collection, 375 calves (39%) had diarrhea, and its prevalence strongly correlated with the score for C. parvum oocyst shedding (p<0.0001). The mortality rate at 90 days was significantly greater for calves with high combined scores of diarrhea and shedding. Factors associated with the shedding of C. parvum were the Normande breed (odds ratio=1.49; 95% confidence interval (CI): 0.93-2.37), dispensing of colostrum using a bucket (odds ratio=1.37; 95% CI: 1.00-1.89), treatment with halofuginone (odds ratio=0.46; 95% CI: 0.19-1.15) and feeding with fermented milk (odds ratio=0.32; 95% CI: 0.17-0.63). C. parvum is widespread among calves under 21 days old in dairy herds of western France. Shedding of C. parvum is associated with a high incidence of diarrhea and increased risk of mortality in young calves. This study identified some associated calf-level factors, although further investigations are necessary to determine appropriate measures that farmers and veterinary practitioners should take to reduce the prevalence of C. parvum., (Copyright © 2015 Elsevier B.V. All rights reserved.)

Published
2015
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