Organic phosphate poisoning of sheep in Skull Valley, Utah   总被引：2，自引：0，他引：2  

K R Van Kampen  L F James  J Rasmussen  R H Huffaker  M O Fawcett 《Journal of the American Veterinary Medical Association》1969,154(6):623-630

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Food restriction and development of thermoregulation in Muscovy ducklings (Cairina moschata)     

M. A. S. Harun  M. van Kampen  R. J. Veeneklaas  G. H. Huisman  G. H. Visser 《British poultry science》1997,38(4):381-389

1. The interaction between the effects of food restriction and cold stress on the development of body temperature, homeothermy index, metabolic rate and body weight were studied in Muscovy ducklings from hatching to 21 d of age.

2. The control group (ad libitum fed) and the food restricted group (fed to zero growth rate for 9 d) both became homeothermic when they were 2 d old with moderate (10°C) cold stress. At severe cold stress (0°C) the control group was homeothermic 5 days after hatching. However the food restricted group did not reach homeothermy at 0°C and showed a large decrease (to hatching level) in homeothermy index at 10°C and 0°C after 9 d of food restriction.

3. Body temperature was lower in the food‐restricted group during restriction and increased by 1°C after 24 h of ad libitum feeding. During food restriction, resting metabolic rate did not increase with age and was lower than the basal and existence metabolic rate predicted by Aschoff and Pohl (1970) and Kendeigh (1970) respectively.

4. The ratio of metabolisable energy (ME) intake to resting metabolic rate was 3 times lower in the food‐restricted group than in the control group (0.09 and 0.27 respectively) on day 9. The availability of ME was more important than age for the development of thermoregulation in Muscovy ducklings. It is concluded that small improvements in the feeding regimen of young ducklings enhance the endurance and consequently reduce mortality from to environmental cold stress in a scavenger poultry system.  相似文献   

Water balance of Colostomised and non‐Colostomised hens at different ambient temperatures     

M. Van Kampen 《British poultry science》1981,22(1):17-23

1. The quantities of water gained and lost, and hence the total water balance, were determined in normal and colostomised White Leghorn laying hens at ambient temperatures of 5, 20 and 35 °G.

2. In both groups the water intake and water loss at all temperatures were well balanced.

3. Water to food ratios and water content of excreta of normal hens increased with increasing temperature.

4. The wetter excreta at 35 °C are caused by an increased urine production and not by an increased water passage through the alimentary tract.  相似文献   

Abortion and ulcerative posthitis associated with caprine herpesvirus-1 infection in goats in California.     

Francisco A Uzal  Leslie Woods  Michelle Stillian  Robert Nordhausen  Deryck H Read  Hanna Van Kampen  Jenee Odani  Sharon Hietala  E J Hurley  Mary L Vickers  Sharon M Gard 《Journal of veterinary diagnostic investigation》2004,16(5):478-484

Three outbreaks of late-gestation abortions in does and ulcerative posthitis in bucks, associated with caprine herpes virus-1 (CHV-1), in California are described. In herd A, 10 of 17 does aborted in a 7-day period, whereas in herd B, 4 of 130 does aborted in a 45-day period and in herd C, 100 of 300 does aborted in a 3-week period. Most fetuses had multifocal pinpoint depressed foci with a zone of hyperemia on external and cut surfaces of the kidneys, liver, lungs, and adrenal glands. Histologically, scattered multifocal areas of necrosis with mild neutrophilic infiltrate were observed in kidneys, brain, liver, adrenal glands, and lungs of most fetuses of the 3 herds. Large amphophilic intranuclear inclusion bodies, which displaced the chromatin, were observed in cells within and around the necrotic foci in kidneys and adrenal glands. Particles 85-113 nm in size with morphology compatible with herpes virus were observed in the nuclei of these cells when examined by electron microscopy. Irregular, shallow, red ulcers were observed in the prepuce of 1 buck from herd C. Prepuce biopsies from this animal had necrosis of the superficial mucosal epithelium and severe submucosal lymphoplasmocytic infiltrates. Large intranuclear amphophilic inclusion bodies were observed in most cells of the stratum spinosum of the preputial epithelium, but no viral particles were observed in these cells. Caprine herpes virus-1 was isolated from tissue pools of fetuses from the 3 herds but not from prepuce biopsies. Positive results were obtained when tissues of a fetus from herd C were processed by a polymerase chain reaction technique to amplify the amino terminus of the glycoprotein C gene of CHV-1. Sera from aborted does from herds B and C and from the 3 bucks from herd C had high antibody titers to CHV-1. The results presented here support the hypothesis that the male goat is involved in the transmission of CHV-1. However, other forms of transmission cannot be ruled out.  相似文献   

Physiopathologic changes in locoweed poisoning of livestock   总被引：2，自引：0，他引：2  

L F James  K R Van Kampen  A E Johnson 《American journal of veterinary research》1970,31(4):663-672

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Regulation of bovine E-selectin expression by recombinant tumor necrosis factor alpha and lipopolysaccharide     

Van Kampen C  Mallard BA 《Veterinary immunology and immunopathology》2001,79(3-4):151-165

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