title: Effects of subclinical Mycobacterium avium ssp. paratuberculosis infection on some physiological parameters, health status and production in dairy cows.
abstract: Milk yield, milk ingredients, health and other, production-related parameters of subclinically infected, Mycobacterium avium ssp. paratuberculosis (MAP-) shedding (positive faecal PCR, n = 20) and non-shedding (negative faecal PCR, n = 10) dairy cows were compared in the period from 10 days prepartum to 120 days postpartum. Body condition, rumen fill and faeces scores were lower in the MAP-shedding cows. There was no significant difference in plasma or urine metabolic parameters between the groups. Milk yield and lactose content tended to be lower (P = 0.074 and 0.077, respectively), somatic cell count tended to be higher (P = 0.097), while milk fat content was significantly higher (P = 0.006) in MAP-shedding cows than in the controls. Milk protein content did not differ between the groups. All other health and production parameters [number of reproductive tract treatments, number of udder treatments, number of artificial inseminations (AIs), calving interval, and service period] were significantly better in the control group. It is concluded that MAP infection, even in a subclinical form, has a significant impact on some production and health parameters of dairy cows.
authors.affiliation: Department of Animal Hygiene, Herd Health and Veterinary Ethology, University of Veterinary Medicine, István utca 2, , H-1078 Budapest , Hungary.
authors.forename: Viktor
authors.initials: V
authors.lastname: Jurkovich
authors.affiliation: Department of Animal Hygiene, Herd Health and Veterinary Ethology, University of Veterinary Medicine, István utca 2, , H-1078 Budapest , Hungary.
authors.forename: Barbara
authors.initials: B
authors.lastname: Bognár
authors.affiliation: Department of Nutrition, Faculty of Agricultural and Environmental Sciences, Szent István University , Gödöllő , Hungary.
authors.forename: Krisztián
authors.initials: K
authors.lastname: Balogh
authors.affiliation: Institute of Animal Husbandry, Faculty of Agricultural and Environmental Science, Szent István University , Gödöllő , Hungary.
authors.forename: Mária
authors.initials: M
authors.lastname: Kovács-Weber
authors.affiliation: M.A.H Food-Control Ltd., Vet-Control Laboratory , Budapest , Hungary.
authors.forename: Kinga
authors.initials: K
authors.lastname: Fornyos
authors.affiliation: Institute of Animal Husbandry, Faculty of Agricultural and Environmental Science, Szent István University , Gödöllő , Hungary.
authors.forename: Rubina Tünde
authors.initials: RT
authors.lastname: Szabó
authors.affiliation: Department of Animal Hygiene, Herd Health and Veterinary Ethology, University of Veterinary Medicine, István utca 2, , H-1078 Budapest , Hungary.
authors.forename: Péter
authors.initials: P
authors.lastname: Kovács
authors.affiliation: Department of Animal Hygiene, Herd Health and Veterinary Ethology, University of Veterinary Medicine, István utca 2, , H-1078 Budapest , Hungary.
authors.forename: László
authors.initials: L
authors.lastname: Könyves
authors.affiliation: Department of Nutrition, Faculty of Agricultural and Environmental Sciences, Szent István University , Gödöllő , Hungary.
authors.forename: Miklós
authors.initials: M
authors.lastname: Mézes
mesh_terms: D000818:Animals; D016022:Case-Control Studies; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology* / Q000473:pathology; D005260:Female; D007774:Lactation / Q000502:physiology*; D007785:Lactose / Q000737:chemistry; D008892:Milk; D008894:Milk Proteins / Q000032:analysis; D016927:Mycobacterium avium subsp. paratuberculosis; D010283:Paratuberculosis / Q000473:pathology*; D049590:Postpartum Period; D011247:Pregnancy; D012307:Risk Factors
chemical_list: D008894:Milk Proteins; D007785:Lactose
keywords: Paratuberculosis; dairy cow; metabolic parameters; milk yield; reproduction