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Phosphorus modeling in sheep submitted to experimental infection with Trichostrongylus colubriformis with the use of 32P

Grant number: 14/05023-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2014
Effective date (End): February 28, 2017
Field of knowledge:Engineering - Nuclear Engineering
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Helder Louvandini
Grantee:Tairon Pannunzio Dias e Silva
Home Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Phosphorus (P) is one of the essential elements for animal metabolism and it is also second most abundant element in animal's body. Environmental problems, supplementation costs and continuous phosphorus depletion of its reserves are major issues on livestock. Isotopic and nuclear techniques play a significant role in food and agriculture, animal health and livestock industry. However, the issue still remains challenging, especially in ruminant gastrointestinal helminth infected with significant changes in mineral metabolism and their nutritional requirements are need to be evaluated. Hence, the objective of this study, proposal modeling of phosphorus in sheep subjected to experimental infection with Trichostrongylus colubriformis by using 32P. Experiment was carried out in 18 Santa Inês sheep were first raised confined from birth to avoid possible previous infection with T. colubriformis will be used. After weaning at two months of age, animals were divided into two treatments: Infected treatment (I) - 12 sheep were offered 5.000 larvae stage of development L3/animal three times a week for three weeks with a total of 45 000 L3 T. colubriformis and control treatment (C) - six sheep remain uninfected. Four weeks after the last infection, sheep will be placed in cages under hygienic and uniform managerial conditions for metabolism studies. After five days of adaptation period, Solution of 32P (29.6 MBq) is injected intravenously into each animal and will follow by seven days to collect samples. At the end of this period the animals will be sacrificed for the collection and evaluation of these tissues (plasma, feces, bone, muscle, kidney, liver and heart). Modeling of phosphorus in animal metabolism, seeking to quantify the metabolic P losses in sheep and estimate the minimum requirements of P. After completion of the project, research work will support technological innovations in nutritional and sanitary management of sheep. In addition, it also improve the sheep sustainability, with respect to the environment, ecologically and economically viable production of ruminant production system. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DIAS E SILVA, TAIRON PANNUNZIO; VENTOSO BOMPADRE, THIAGO FRANCISCO; DANASEKARAN, DINESH KUMAR; SAKITA, GABRIEL ZANUTO; ABDALLA FILHO, ADIBE LUIZ; JIMENEZ, CAROLINA RODRIGUES; DE CAMPOS FONSECA PINTO, ANA CAROLINA BRANDAO; TALAMINI DO AMARANTE, ALESSANDRO FRANCISCO; MCMANUS, CONCEPTA; LOUVANDINI, HELDER. Trichostrongylus colubriformis infection: Impact on digesta passage rate and lamb performance. Veterinary Parasitology, v. 272, p. 17-22, AUG 2019. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SILVA, Tairon Pannunzio Dias e. Phosphorus modelling in lambs submitted to experimental infection with Trichostrongylus colubriformis with the use of 32P. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Centro de Energia Nuclear na Agricultura Piracicaba.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.