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Acta Veterinaria Hungarica
Authors:
Attila Dobos
,
György Gábor
,
Enikő Wehmann
,
Béla Dénes
,
Bettina Póth-Szebenyi
,
Áron B. Kovács
, and
Miklós Gyuranecz

( Diskin and Morris, 2008 ). The aim of this study was to examine the effect of C. burnetii seropositivity by ELISA and complement fixation test (CFT) on early pregnancy and fetal losses in dairy cows between days 29 and 70 of gestation in some Hungarian

Open access
Acta Veterinaria Hungarica
Authors:
Viktor Jurkovich
,
Barbara Bognár
,
Krisztián Balogh
,
Mária Kovács-Weber
,
Kinga Fornyos
,
Rubina Tünde Szabó
,
Péter Kovács
,
László Könyves
, and
Miklós Mézes

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.

Open access

The heart rate variability (HRV) parameters of dairy cows were monitored during parlour (PARL) and the later installed automatic (AMS) milking on a small-scale commercial dairy farm in Hungary. The aim of the study was to assess stress in relation to the type of milking and the frequency of human interaction. Parlour milking involved regular moving and crowding of the animals with frequent human interaction, which were much less frequent in automatic milking. The first phase of the study was conducted prior to the changeover [n = 27] and the second two months afterwards [n = 19 (of the cows from the first phase)]. Heart rate (HR) was recorded by the Polar RS800 CX recording system. HRV parameters indicative of sympathovagal balance were calculated for periods of lying and standing in the barn, waiting before milking and milking, respectively. Morning and evening faecal glucocorticoid concentrations were also measured. Fear of humans was tested by an avoidance distance test. Baseline HRV parameters showed no difference (P > 0.05) between the two systems. In the periods before, during and after milking a higher sympathetic tone was detected in cows in the PARL phase. Mean faecal glucocorticoid concentrations were higher at the time of parlour milking. The avoidance distance did not differ between the two phases. The results suggest that automatic milking might be less stressful for cows than parlour milking, possibly due to the shorter duration of restraint after milking and the less frequent human interaction.

Open access
Acta Veterinaria Hungarica
Authors:
Zoltán Szelényi
,
Dorottya Győri
,
Szabolcs Boldizsár
,
Levente Kovács
,
Attila Répási
,
László Molnár
, and
Ottó Szenci

The aim of this study was to examine the effect of twin pregnancy, fetal laterality, the number of corpora lutea (CL) and cavitary CL on pregnancy losses in Holstein-Friesian cows with a positive pregnancy diagnosis based on ultrasonography between days 29–42 after AI. Pregnancy was confirmed by transrectal palpation between days 57–70 after AI and at the time of drying-off as well. Twin pregnancy rate was 8.4% at the time of the early pregnancy examination. Pregnancy loss did not differ between singleton- and twin-carrying animals either between days 57–70 of gestation or at drying-off. More losses occurred in singletons between days 29–42 and 57–70 in cows with cavitary than in cows with noncavitary CL (12.1% vs. 3.6%; P < 0.05) and in cows with double CL than in cows with single CL (7.3% vs. 3.6% %; P < 0.05). Between days 57–70 of gestation and drying-off this difference was still significant (20.7% vs. 3.7%; P < 0.001), while it was non-significant between cows with one CL (5.7%) vs. double CL (3.7%). Cavity occurrence was not affected by hormone therapy prior to AI (either PGF2α or OvSynch; 4.4% vs. 5.4%, respectively); however, the number of CL was reduced by the treatments (11.6 vs. 19.6%; P < 0.0005). In twin pregnancies there was no difference in the pregnancy losses between bilateral and unilateral pregnancies at any time point. The length of gestation was 278.2 ± 10.5 (singleton) and 267.4 ± 31.2 (twin) days, respectively (P < 0.01). The stillbirth ratio was higher in twin carriers than in singleton carriers (19.5% vs. 5.3%; P < 0.001).

Open access
Acta Veterinaria Hungarica
Authors:
Tamás Tóth
,
Zsolt Abonyi-Tóth
,
Ferenc Pajor
,
Róbert Kocsis
,
Alexandra Juhász
,
János Tőzsér
, and
Péter Póti

The length of the streak canal and the area of the teat end were studied by ultrasound during the dry period in 40 Holstein-Friesian cows. In the first week, the values of these teat parameters decreased significantly (P < 0.05) and this did not change significantly until the middle of the dry period. In the last month of gestation, the length of the streak canal was significantly reduced (P < 0.05), while the area of the teat end did not decrease significantly (P > 0.05). At each of the five examination times, a very strong positive correlation (r = 0.85-0.94) was found between the two teat parameters. In healthy cows, the streak canal and the area of teat end, both of which are part of the udder’s defence system, can regenerate sufficiently during the dry period, minimising the risk of contamination through the streak canal and the development of mastitis. If the regeneration of this defence system fails, the chances of infection through the streak canal increase.

Open access

Introduction The transition period, from three weeks prepartum to three weeks postpartum, is the most challenging time for a dairy cow ( Grummer, 1995 ). During this time, there is a marked decrease in dry matter intake ( Bertics et al., 1992

Open access

Introduction The transition period (from 3 weeks prepartum to 3 weeks postpartum) is considered the most important time for the dairy cow ( Grummer, 1995 ; Drackley, 1999 ). Dairy cows face a sharp increase in energy demand after calving due to

Open access

infects the placenta and then it may spread to the fetus via the amniotic-oral or haematogenous route ( Agerholm, 2013 ). The retention of fetal membranes is a common problem in periparturient dairy cows, but its exact aetiology has not been fully

Open access
Acta Veterinaria Hungarica
Authors:
Róbert Kocsis
,
Judit Süle
,
Péter Nagy
,
Judit Gál
,
Emília Tardy
,
Gábor Császár
, and
Bence Rácz

observed between 2011 and 2020. The reason for this is related to a decrease in the number of dairy farms in Hungary. The number of dairy farms included in this study was 984 in 2011 and 797 in 2020. As the number of dairy cows is constantly growing in

Open access