Amino acid supplementation of hydrolyzed feather meal diets for finisher pigs1,2

Divakala, K. C.; Chiba, L. I.; Kamalakar, R. B.; Rodning, Soren P.; Welles, Elizabeth G.; Cummins, K.A.; Swann, Jonathan R.; Cespedes, F.; Payne, R. L.

doi:10.2527/jas.2008-1121

Cited by 27 publications

(13 citation statements)

References 27 publications

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Section: Discussionmentioning

confidence: 99%

“…Our second objective was to analyze feathers. Feather meal is an attractive source of cheap amino acids for food producing animal diets (Bertsch & And Coello, 2005;Divakala et al, 2009). This ingredient is currently incorporated into diet on as-fed in chicken, rainbow trout, shrimp and salmon (Bureau et al, 2000;Bransden et al, 2001;Cheng et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

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Depletion study of three formulations of flumequine in edible tissues and drug transfer into chicken feathers

Cornejo

Lapierre

Iragüen

et al. 2011

Vet Pharm & Therapeutics

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To ensure the delivery of safe animal products to consumers, withdrawal times (WDT) of drugs must be respected. Drugs administered in therapies can also reach nonedible tissues (for humans) such as feathers; this transfer is of concern as feather meal is used in diets of food producing animals, being this a possible source of residue contamination of final products for human consumption. WDTs of three flumequine formulations (10%, 80% premix powder and 20% solution) as well as the transfer of this drug into feathers were determined. One hundred and twenty broiler chickens were allocated into four experimental groups (36 birds each). Three of them were treated with 24 mg/kg bw orally for five consecutive days of each flumequine formulation, whereas one group remained untreated (12 birds as control group). After the treatment ended, six chickens of each experimental group and two controls were slaughtered daily for 6 days. Samples of muscle, liver and feathers were collected and analyzed by liquid chromatography tandem mass spectrometry (LC MS/MS). The WDTs showed differences between formulations. Flumequine concentrations found in feathers remained high during WDT and after this period, thus suggesting that the WDTs estimated for the pharmaceutical formulation of flumequine do not guarantee the absence of this drug in chicken nonedible tissues such as feathers.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Depletion study of three formulations of flumequine in edible tissues and drug transfer into chicken feathers

Cornejo

Lapierre

Iragüen

et al. 2011

Vet Pharm & Therapeutics

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“…La eficiencia alimenticia también se puede reducir por efecto de estos factores (8,13). Sin embargo, en este trabajo no se encontraron diferencias en la eficiencia alimenticia entre los tratamientos (p>0.05), lo que sugiere que el aprovechamiento de las dietas fue similar.…”

Section: Discussionunclassified

“…El comportamiento productivo de las aves podría verse afectado si no se toma en consideración este punto. Al respecto se ha observado que el desempeño productivo de los cerdos no se afecta cuando la dieta con harina de plumas se suplementa con la cantidad requerida de aminoácidos (8).…”

Section: Introductionunclassified

Desempeño productivo y rendimiento de canal en pavos alimentados con harina de plumas tratadas con NaOH

et al. 2013

Rev MVZ Córdoba

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RESUMENObjetivo. Evaluar el desempeño productivo y el rendimiento de la canal en pavos en crecimiento alimentados con dietas elaboradas con harina de plumas (HP). Materiales y métodos. Los tratamientos fueron una dieta control y dos dietas experimentales con harina de plumas tratada con 50 ó 100 g de NaOH/kg. Se utilizó un diseño de bloques al azar. El consumo de alimento y el peso de los animales se registró cada dos semanas. Los datos del desempeño productivo se analizaron con el procedimiento MIXED del programa estadístico SAS. El rendimiento de la canal se analizó con el procedimiento GLM del programa estadístico SAS. Resultados. Los pavos que consumieron la dieta testigo tuvieron mejores ganancias de peso (GP), consumo de alimento (CA), peso de la canal y de sus partes (p<0.05) que aquellas con harina de plumas. Sin embargo, se observó una mayor GP, CA, peso de la canal y del muslo (p<0.05) cuando se trató la harina de plumas con 100 g de NaOH/kg. Conclusiones. Los resultados obtenidos indican que la utilización de harina de plumas disminuyó el comportamiento productivo y el rendimiento de canal en los pavos. Sin embargo, el aumento del tratamiento de la harina de plumas de 50 a 100 g de NaOH/ kg mejoró el comportamiento productivo y el rendimiento de canal.Palabras clave: Alimentación animal, composición de la canal, harina de plumas, hidróxido de sodio, pavos (Fuente:AIMS).Desempeño productivo y rendimiento de canal en pavos alimentados con harina de plumas tratadas con NaOH ABSTRACTObjective. Evaluate the productive performance and carcass yield of growing turkeys fed with diets including feather meal. Materials and methods. The treatments were: a control diet and two diets with feather meal (FM) treated with 50 or 100 g of NaOH/kg (5% inclusion) each. A random block design was used. Feed consumption and weight gain were recorded every two weeks. Productive performance data was analyzed using the MIXED procedure of the SAS statistical program. Carcass yield was analyzed using the GLM procedure of the SAS statistical program. Results. Weight gain (WG), feed consumption (FC), carcass yield and composition were higher in turkeys fed with the control diet, in comparison to those fed with FM diets (p<0.05). However, Turkeys fed diets with 100 g NaOH/kg presented higher WG, FC, carcass yield and thigh weight (p<0.05) than turkeys fed diets with 50 g NaOH/kg. Conclusions. The use of FM reduces the productive performance and carcass yield in turkeys. However, improvement on productivity and carcass yield were observed when FM treatment with NaOH increased from 50 to 100 g/kg.

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“…17 These diets include feathers in their formulation as a low cost source of aminoacids. 18 Consequently, to safeguard food safety from farm to table, antimicrobials such as tetracyclines need to be studied regarding their behavior in feathers as it relates to their concentration levels in edible tissues. However, pursuing this goal necessarily implies implementing and validating analytical methods.…”

Section: Introductionmentioning

confidence: 99%

In-House Validation of HPLC-MS/MS Methods for Detection and Quantification of Tetracyclines in Edible Tissues and Feathers of Broiler Chickens

Pokrant

Maddaleno

Araya

et al. 2017

J. Braz. Chem. Soc.

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For the detection of tetraciclines in feathers, muscle and liver, an internal protocol was designed for in-house validation of two methods, through high performance liquid chromatography with tandem mass spectrometric (HPLC-MS/MS) techniques. This protocol was based on the recommendation of the decision 2002/657/EC from the European Community as well as the food and drug administration (FDA) VICHGL49. Limit of detection (LOD) was set at 20 μg kg -1 and the limit of quantification (LOQ) ranged from 21.5 to 24.2, 21.2 to 21.6, and 25.0 to 27.7 μg kg -1 in feahers, muscle and liver samples, respectively, for all analytes. The calibrations curves show a coefficient of determination (R 2 ) above 0.98, 0.99 and 0.96 for feathers, muscle and liver samples, respectively. Analyte recovery ranged from 92 to 108%. In conclusion, these methods can be deemed accurate and reliable, and their validation is a fundamental step to be performed in depletion studies on these matrices.

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Amino acid supplementation of hydrolyzed feather meal diets for finisher pigs1,2

Cited by 27 publications

References 27 publications

Depletion study of three formulations of flumequine in edible tissues and drug transfer into chicken feathers

Depletion study of three formulations of flumequine in edible tissues and drug transfer into chicken feathers

Desempeño productivo y rendimiento de canal en pavos alimentados con harina de plumas tratadas con NaOH

In-House Validation of HPLC-MS/MS Methods for Detection and Quantification of Tetracyclines in Edible Tissues and Feathers of Broiler Chickens

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