Vitamin E in young turkeys: a reassessment of the requirement

Soto-Salanova, M. F.

doi:10.31274/rtd-180813-10132

Cited by 2 publications

(1 citation statement)

References 168 publications

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“…This resistance was probably due, in large measure, to a high concentration of TOC in RBC that parallels high concentrations of plasma TOC (Soto-Salanova, 1995). Plasma TOC at 1 d was 9.11 /xg/mL, a relatively high concentration.…”

Section: Methodsmentioning

confidence: 94%

Effect of Dietary Linoleic to Linolenic Acid Ratio and Vitamin E Supplementation on Vitamin E Status of Poults

Applegate

Sell

1996

Poultry Science

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Two experiments were conducted to determine the effect of dietary linoleic to linolenic acid (LO:LN) ratio and dl-alpha-tocopheryl acetate (TA) supplementation on selected characteristics of the liver and cerebellum and on vitamin E status of turkey poults from hatch through 22 d of age. In Experiment 1, 1-d-old poults were fed diets containing no supplemental TA (0E) or 150 IU TA/kg diet (150E). Poults fed the 150E diet had greater (P< 0.001) concentrations of alpha-tocopherol (TOC) in the liver and plasma than those fed the 0E diet from 7 to 22 d of age. The 150E diet, however, did not completely overcome the decrease in liver and plasma TOC concentrations observed at these ages. The 150E diet had no effect on poult BW, feed efficiency, or on the weight, protein, lipid, or fatty acid concentrations of the liver. Thiobarbituric acid reactive substances assay of liver and hemolysis assay of red blood cells (RBC) showed that the 150E diet decreased the susceptibility of liver and RBC to in vitro peroxidation at 13 and 22 d of age. In Experiment 2, 1-d-old poults were fed the 0E and 150E diets in a complete factorial arrangement with decreasing ratios of LO:LN (10, 5, and 1). Dietary LO:LN ratio had no effect on RBC hemolysis or cerebellum TOC concentration. As the ratio of LO:LN decreased, the arachidonic acid content of liver and cerebellum lipids decreased. Ratios of n-6 to n-3 fatty acids in liver and cerebellum were directly related to dietary LO:LN at 13 and 22 d of age.

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Section: Methodsmentioning

confidence: 94%

Effect of Dietary Linoleic to Linolenic Acid Ratio and Vitamin E Supplementation on Vitamin E Status of Poults

Applegate

Sell

1996

Poultry Science

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Turkey Knockdown in Successive Flocks

Evans¹,

Edson²,

Watkins³

et al. 2000

Avian Diseases

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Turkey knockdown was diagnosed in three of five flocks of hen turkeys on a single farm within a 12-mo period. The age of birds in the flocks affected ranged from 6 wk 2 days to 7 wk 4 days. The attack rate ranged from 0.02% to 0.30% with a case fatality rate in affected birds ranging from 0 to 74%. The diagnosis was made on the basis of clinical signs and histopathologic lesions associated with knockdown. The feed in all flocks contained bacitracin methylene disalicylate and monensin (Coban). Affected birds were recumbent, demonstrated paresis, and were unable to vocalize. Postmortem examination revealed few significant lesions although pallor of the adductor muscles and petechiation in adductor and gastrocnemius muscles were noted. Birds that had been recumbent for extended periods were severely dehydrated. Consistent microscopic lesions included degeneration, necrosis, and regeneration of adductor, gastrocnemius, and abdominal muscles. No lesion in cardiac tissue was noted. Results of our investigation indicated that changes in water consumption, vitamin E status, and brooder to finisher movement correlated with the occurrence of knockdown. Turkey knockdown was defined in 1993 as any condition identified in a turkey flock that has affected the neuromuscular system to a degree that a turkey is unable to walk or stand. This definition was later modified to...neuromuscular or skeletal systems to a degree that a turkey is unable to walk or stand properly. Knockdown may be associated with numerous feed, management, or disease factors alone or in combination. Dosage of monensin, feed restriction/gorging, water restriction, heat stress, copper, mycotoxins, sodium chloride in feed, and sulfa drugs have all been suggested as contributing factors; however, laboratory studies to duplicate this have not been successful. This report presents observations from a single farm at which three of five hen flocks in a single year experienced knockdown. When a flock was reported as affected, a detailed investigation was initiated within 3 hr. The fifth flock was followed on a twice weekly basis from 0 to 8 wk of age to determine if initiating events were evident, but knockdown did not occur.

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Vitamin E in young turkeys: a reassessment of the requirement

Cited by 2 publications

References 168 publications

Effect of Dietary Linoleic to Linolenic Acid Ratio and Vitamin E Supplementation on Vitamin E Status of Poults

Effect of Dietary Linoleic to Linolenic Acid Ratio and Vitamin E Supplementation on Vitamin E Status of Poults

Turkey Knockdown in Successive Flocks

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