The Response of Turkey Poults to Virginiamycin in Diets Containing Various Levels of Supplemental Methionine

Harms, R. H.; Miles, R. D.

doi:10.3382/ps.0621896

Cited by 14 publications

(4 citation statements)

References 3 publications

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“…The results achieved in experiments 1 and 2 are comparable to what other researchers have observed in both chickens and turkeys [1][2][3][4][5][6][7][8][9][10][11]. The value of VM can be calculated in terms of reduced feed cost but also in terms of reduced mortality.…”

Section: Processing Performancesupporting

confidence: 75%

Live and Processing Performance Responses of Broilers Fed Low and Extra-Low Nutrient Density Withdrawal Diets Supplemented with Virginiamycin

Cervantes¹,

Bafundo²,

Pesti

et al. 2008

Journal of Applied Poultry Research

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Primary Audience: Nutritionists, Complex Managers, Veterinarians SUMMARYTwo experiments were conducted to demonstrate the nutrient-sparing effects and costeffectiveness of virginiamycin (VM) when fed to broiler chickens in extended withdrawal diets. In experiment 1, broiler chickens (Ross × Cobb) were fed the same starter and grower diets. On d 30, the chickens were switched to the withdrawal diets, and these were fed until 49 d when the experiment ended. Treatments were as follows: 1) standard broiler withdrawal diet (17.1% CP), 2) a broiler withdrawal diet with low nutrient density (16% CP), and 3) the same broiler withdrawal diet as treatment 2 but supplemented with 15 ppm VM. In experiment 2, broiler chickens (Ross × Cobb) were fed the same starter and grower diets to d 35 when they were switched to the withdrawal diets, and these were fed until the experiment ended (d 49). Birds on treatment 1 received a standard broiler withdrawal diet similar to the one used in experiment 1, birds on treatment 2 received a broiler withdrawal diet with extra-low nutrient density (15% CP), and birds on treatment 3 received the same broiler withdrawal diet as in treatment 2 but supplemented with 15 ppm VM. In both experiments, the chickens fed the withdrawal diet containing VM had the heaviest BW, and the unadjusted feed conversions were comparable for the standard withdrawal diet (without reduced nutrient density) and the reduced nutrient density diets with VM. In both experiments, the chickens fed the withdrawal diets with VM had the lowest mortality. An analysis of the breast meat yield results showed that in both experiments, the birds fed the extended withdrawal diets with VM produced more total pounds of breast meat than the other 2 treatments.

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Section: Processing Performancesupporting

confidence: 75%

Live and Processing Performance Responses of Broilers Fed Low and Extra-Low Nutrient Density Withdrawal Diets Supplemented with Virginiamycin

Cervantes¹,

Bafundo²,

Pesti

et al. 2008

Journal of Applied Poultry Research

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“…March et al (1978) observed that virginiamycin resulted in improved growth and feed conversion in broilers and that diet energy was metabolized 7.2% more efficiently. Workers at the University of Florida learned that dietary virginiamycin at low levels spared the methionine requirement of turkey poults (Harms and Miles, 1983), increased the utilization of xanthophyll pigments in broilers (Miles et al, 1984), enhanced the utilization of dietary phosphorus for chicks (Buresh et ah, 1985a) and dietary energy for poults (Buresh et al, 1985b), and increased the absorption of dietary manganese by broilers (Henry et al, 1986). Woodward et al (1988) reported that virginiamycin did not affect shrink or water uptake of broilers; however, yield was increased significantly.…”

Section: Introductionmentioning

confidence: 96%

Influence of Virginiamycin on Growth and Efficiency of Large White Turkeys

et al. 1991

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Efficacy of virginiamycin (22 mg/kg) in combination with no drug, amprolium, carbarsone, halofuginone, or monensin, was studied. Male and female turkeys were raised to market age in five experiments conducted from 1983 to 1987. Body weights and feed:gain responses to virginiamycin for males and females were positive and significant (P less than .05). Virginiamycin resulted in mean 5.2 and 6.3% body weight responses and 3.3 and 2.2% feed:gain responses for males at 19 or 20 wk of age and for females at 16 or 17 wk of age, respectively. Mortality rates were low in all studies, and were not influenced by virginiamycin. In a processing study, virginiamycin in combination with halofuginone did not affect shrinkage, yield, or market grade. Feed was utilized by males and females 3.9 and 3.0%, respectively, more efficiently than expected with dietary virginiamycin, compared with results predicted by a simulation modeling technique. Profitability was considerably greater with dietary virginiamycin using actual data than with simulated feed consumption data.

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“…They concluded that ipronidazole improved lysine and sulfur amino acids utilization regardless of the level of amino acid in the diet. Harms and Miles (1983) had previously reported that supplementing the diet with virginiamycin improved methionine utilization when added to a diet deficient in methionine. The present study was conducted to determine whether ipronidazole would improve methionine utilization of poults fed the methionine-deficient diet used by Harms and Miles (1983).…”

Section: Introductionmentioning

confidence: 98%

Research Note: Performance of Turkey Poults When Fed Two Levels of Methionine With and Without Ipronidazole

Harms

Buresh

1987

Poultry Science

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An avian equivalent of the mammalian thyroid isthmus appeared in thiouracil-treated (.1% in feed from hatching to 6 and 8 weeks of age) chickens. In two experiments in which chickens were fed a diet containing thiouracil, thyroid tissue was found connecting the thyroid glands. Histological examination of the connecting tissue revealed that it was of the same cellular composition as the thyroid glands.

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The Response of Turkey Poults to Virginiamycin in Diets Containing Various Levels of Supplemental Methionine

Cited by 14 publications

References 3 publications

Live and Processing Performance Responses of Broilers Fed Low and Extra-Low Nutrient Density Withdrawal Diets Supplemented with Virginiamycin

Live and Processing Performance Responses of Broilers Fed Low and Extra-Low Nutrient Density Withdrawal Diets Supplemented with Virginiamycin

Influence of Virginiamycin on Growth and Efficiency of Large White Turkeys

Research Note: Performance of Turkey Poults When Fed Two Levels of Methionine With and Without Ipronidazole

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