Research Article Open Access

Prophylactic use of Antibiotics is Essential for Fattening Pig Production?

Túlio Otávio de Araújo Lima Neto1, Letícia Mendonça Rodrigues2, Vitor de Oliveira Araújo3, Hebert Silveira4, Vinicíus de Souza Cantarelli2 and Cesar Augusto Pospissil Garbossa5
  • 1 Science and Technology Southeast of Minas Gerais, Brazil
  • 2 Federal University of Lavras, Brazil
  • 3 Federal Rural University of Amazon, Brazil
  • 4 Agroceres Multimix, Brazil
  • 5 University of São Paulo, Brazil


The demand for animal protein is a fact of relevance for the production systems, especially pork, the most consumed animal protein source in the world. In this sense to ensure the efficient production during the pigs raising the use of Prophylactic Antibiotics (PA) is a common practice, but there is a great potential for the occurrence of resistance to antibiotics. However, the use of PA may not be necessary for certain groups of pigs for example with high sanitary status within the production system. The study lasted for 76 days. Seventy-two barrows at 63 days of age with initial weight of 26.11±3.55 kg were used. Two treatments were performed, without the use of prophylactic antibiotics or with the use for five days, being given at 63 days of age with Doxycycline and at 105 days of age with Tiamulin. PA use worsened ADG (p = 0.035) by 5.0% and body weight by 3.0% (p = 0.039) of pigs at 105 days of age when compared to pigs that did not receive Doxycycline. After the second use of PA the pigs at 117 days of age which received Tiamulin presented better ADG of 7.0% (p = 0.035) and a greater body weight of 1.2% (p = 0.038) compared to control group. The animals of the control group presented 6.0% greater loin depth (p = 0.023) than the animals that received the PA, however pigs of the PA group presented greater hot carcass weight of 0.6% (p = 0.005) and greater carcass compactness of 2.4% (p = 0.004) compared to the control group. The use of PA should be studied with caution and in a holistic way, considering the sanitary characteristics of management to verify if its use is really justified, as observed in the present study if used in inopportune moments its use can impair the performance of the pigs.

American Journal of Animal and Veterinary Sciences
Volume 13 No. 3, 2018, 87-93


Submitted On: 30 April 2018 Published On: 15 July 2018

How to Cite: Lima Neto, T. O. A., Rodrigues, L. M., Araújo, V. O., Silveira, H., Cantarelli, V. S. & Pospissil Garbossa, C. A. (2018). Prophylactic use of Antibiotics is Essential for Fattening Pig Production?. American Journal of Animal and Veterinary Sciences, 13(3), 87-93.

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  • Swine
  • Doxycycline
  • Tiamulin
  • Metaphylatic