Fecha/hora: 09/05/2024 08:39:49

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	19/07/2023	
Fecha de la última actualización: 	19/07/2023	
Autoria: 	SCHILD, C.; BOABAID, F.M.; OLIVEIRA, L.G.S.; ARMENDANO, J.I.; SARAVIA, A.; CUSTODIO, A.; ALGORTA, J.; ALVAREZ, C.; JAURENA, M.; DIXON, R.M.; RIET-CORREA, F.	
Afiliación: 	CARLOS SCHILD, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; California Animal Health Food Safety, University of California Davis, 105 W Central Ave, San Bernardino, 92408, CA, United States; F. M. BOABAID, Polo de Desarrollo Universitario, Instituto Superior de la Carne, Sede Tacuarembó, CENUR Noreste, Universidad de la República, Ruta 5, km 386, Tacuarembó, 45000, Uruguay; LUIZ GUSTAVO SCHNEIDER DE OLIVEIRA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.; J.I. ARMENDANO, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Paraje Arroyo Seco S/N, Tandil, 7000, Argentina; ANDERSON SARAVIA DE MELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; A. CUSTODIO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; J. ALGORTA, Barraca Deambrosi S.A, Av. Rondeau 2257, Montevideo, 11800, Uruguay; C. ÁLVAREZ, Laboratorio Analítico Agroindustrial, Ruta 90 km 5, Paysandú, 60000, Uruguay; MARTIN ALEJANDRO JAURENA BARRIOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; R. M. DIXON, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, 4072, QLD, Australia; FRANKLIN RIET-CORREA AMARAL, Programa de pós-graduação em Ciência Animal nos Trópicos, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, 41405-000, Brazil.	
Título: 	Response of cows with osteomalacia grazing sub-tropical native pastures to phosphorus supplementation with loose mineral mix or feed blocks.	
Año de publicación: 	2023	
Fuente/Imprenta: 	Veterinary Journal. 2023, Volume 298-299, 106013. https://doi.org/10.1016/j.tvjl.2023.106013	
ISSN: 	1090-0233	
DOI: 	10.1016/j.tvjl.2023.106013	
Idioma: 	Inglés	
Notas: 	Article history: Accepted 20 June 2023; Available online 22 June 2023. -- Correspondence author: Riet-Correa, F.; Programa de pós-graduação em Ciência Animal nos Trópicos, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, Brazil; email:franklinrietcorrea@gmail.com  -- FUNDING: This work was supported by Agencia Nacional de Investigación e Innovación . [grant FMV_1_2017_1_136347 ]. A postgraduate scholarship was provided to Carlos Schild by INIA and the Comisión Académica de Posgrado de la Universidad de la República. --	
Contenido: 	Osteomalacia outbreaks often occur in cattle grazing native pastures in regions with endemic phosphorous (P) deficiency. This study evaluated the responses of two groups of cows, initially with clinical signs of chronic P deficiency, to P supplements (100 g P/kg) offered ad libitum for 13 weeks as a loose mineral mix (LMM group) or the same mineral mix offered as blocks (BMM group). Half of the cows in each group were categorized as ?with? or ?without? severe osteopenia according to a test that depended on the resistance to penetration of a needle through the left lateral process of the L4-L5 lumbar vertebra. The groups grazed two paddocks that were switched each 3 weeks. The liveweight, supplement intakes, and the P-concentrations in soil, forage, blood, and external cortical bone (ECB) of the ribs were measured. The bicarbonate-extractable P in soil was 3.5 mg/kg. The mean of total P in forage (0.95 g/kg/DM), inorganic P in serum (iP, 0.96 mmol/L), and total P in the ECB of the ribs (85 mg/mL) at the beginning of the experiment were all low and consistent with severe chronic P deficiency. The P supplementation allowed clinical recovery in 18/20 cows with their serum and ECB P and calcium approaching normal values and in the two remaining cows the only sign was abnormal gait. Cows consumed more of the LMM than BMM supplement (means 8.3 and 6.6 g P/day, respectively). After 13 weeks cows initially classified as ?with severe osteopenia? and supplemented with LMM had higher (P < 0.05) final liveweight (difference = 21.6 kg), iP (difference = 0.74 mmol/L), bone Ca (difference = 65.7 mg/mL) and bone P (difference = 26.5 mg/mL) concentrations and lower (P < 0.01) final serum Ca/iP ratio (difference = -0.65) than cows with severe osteopenia but supplemented with BMM. The treatment of severe P deficiency cows grazing P deficient sub-tropical grasslands by P supplementation for 13 weeks was more effective with LMM than BMM. © 2023	
Palabras-Clave: 	Osteomalacia; Phosphorus deficiency; PLATAFORMA DE INVESTIGACIÓN EN SALUD ANIMAL - INIA; Uruguay.	
Categoría del tema: 	L01 Ganadería	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103604-1) - PXI - AP - DD - Veterinary Journal/2023 -  -  - DIS