Water movements after an intraruminal water load in pregnant and lactating Sardi sheep

Benlamlih, S.; Oukessou, M.

doi:10.1051/rnd:19900208

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…After infusion of 3 H 2 O into the rumen of hydrated lactating ewes (Benlamlih and Oukessou, 1990), 24-h dehydrated goats (Holtenius, 1986), or 48-h dehydrated sheep (Dahlborn and Holtenius, 1990), approximately 70% of the 3 H 2 O activity (expressed as percentage of the equilibration value) could be measured in plasma within the first hour after infusion. After 4 h, the equilibration is nearly completed (Benlamlih and Oukessou, 1990;Dahlborn and Holtenius, 1990). Wheelock et al (1965) demonstrated that the freezing point of blood (FP blood ) and FP milk increased steadily over 2.5 h when a 24-h-water-restricted Friesian cow (20 to 25 kg of milk/d) had a sudden intake of 50 kg of water.…”

Section: Introductionmentioning

confidence: 99%

Changes in Freezing Point of Blood and Milk During Dehydration and Rehydration in Lactating Cows

Bjerg¹,

Rasmussen²,

Nielsen

2005

Journal of Dairy Science

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We studied the influence of short-term changes in water intake in 4 lactating Holstein cows on diurnal fluctuation of packed cell volume (PCV), freezing point of blood (FPblood), freezing point of milk (FPmilk), and the relationship between changes in FPblood and FPmilk. The experiment lasted 108 h and was divided into 3 periods: 1) control (38 h); 2) dehydration/rehydration with 4 consecutive 12-h sequences: 8 h without water, 0.5-h access to water, 1.5 h without water, and 2-h access to water; and (3) 22 h for reconstitution. Cows were milked at 12-h intervals. Blood was sampled from the jugular vein hourly throughout the experiment, and at 0, 15, 30, 60, 90, 120, 150, 180, 210, and 240 min after initiated rehydration following the 8-h dehydration sequences. Intakes of free water and water in feed were recorded every hour. The PCV was negatively affected by water intake within the hour before sampling. Dehydration lowered FPblood steadily, whereas FPblood increased by 0.024 degrees C within 30 min following a large water intake in the rehydration period. The FPblood was not significantly influenced by actual water intake, but was highly correlated with the available water pool at time of blood sampling. The FPmilk correlated positively with the FPblood collected 1 h before milk sampling, indicating a delay in the transfer of water from plasma to milk. In summary, FPblood and FPmilk decrease during dehydration and increase during rehydration. Rehydration following a long dehydration period caused an increase in FPmilk within 1 h, but not above the initial level for FPmilk of the cow.

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Section: Introductionmentioning

confidence: 99%

Changes in Freezing Point of Blood and Milk During Dehydration and Rehydration in Lactating Cows

Bjerg¹,

Rasmussen²,

Nielsen

2005

Journal of Dairy Science

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Comparison among the effects of oral, intraperitoneal and intravenous fluid-loading on kidney function and drinking in goats

Silanikove

1994

Comparative Biochemistry and Physiology Part A: Physiology

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Pharmacokinetics, bioavailability and dosage regimen of sulphadiazine (SDZ) in camels (Camelus dromedarius)

Kumar¹,

Ap²,

Kapoor³

et al. 1998

Vet Pharm & Therapeutics

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The pharmacokinetics of sulphadiazine (SDZ) (100 mg/kg, body weight) were investigated in six camels (Camelus dromedarius) after intravenous (i.v.) and oral (p.o.) administration. Following i.v. administration, the overall elimination rate constant (beta) was 0.029 +/- 0.001/h and the half-life (t1/2beta) was 23.14 +/- 1.06 h. The apparent volume of distribution (Vd(area)) was 0.790 +/- 0.075 L/kg and the total body clearance (ClB) was 23.29 +/- 2.50 mL/h/kg. After p.o. administration, SDZ reached a peak plasma concentration (Cmax(cal.)) of 62.93 +/- 2.79 microg/mL at a post injection time of (Tmax(cal.)) 22.98 +/- 0.83 h. The elimination half-life was 19.79 +/- 1.22 h, not significantly different from that obtained by the i.v. route. The mean absorption rate constant (Ka) was 0.056 +/- 0.002 h(-1) and the mean absorption half-life (t1/2Ka) was 12.33 +/- 0.37 h. The mean availability (F) of sulphadiazine was 88.2 +/- 6.2%. To achieve and maintain therapeutically satisfactory plasma SDZ levels of > or = 50 microg/mL, the priming and maintenance doses would be 80 mg/kg and 40 mg/kg intravenously and 90 mg/kg and 45 mg/kg orally, respectively, to be repeated at 24 h intervals.

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Water movements after an intraruminal water load in pregnant and lactating Sardi sheep

Cited by 3 publications

References 3 publications

Changes in Freezing Point of Blood and Milk During Dehydration and Rehydration in Lactating Cows

Changes in Freezing Point of Blood and Milk During Dehydration and Rehydration in Lactating Cows

Comparison among the effects of oral, intraperitoneal and intravenous fluid-loading on kidney function and drinking in goats

Pharmacokinetics, bioavailability and dosage regimen of sulphadiazine (SDZ) in camels (Camelus dromedarius)

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