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Inappropriate use of antimicrobials on dairy farms in midwestern Brazil and their potential risk to public health.

A. F. Cruz

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06-24-2020

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Abstract:

W54
Inappropriate use of antimicrobials on dairy farms in midwestern Brazil and their potential risk to public health.
A. F. Cruz*1, D. B. S. Caetano1, D. C. Silva2, E. C. Nogueira3, E. S. Nicolau4, C. Gebara4, L. A. F. Silva1. 1School of Veterinary Medicine and Animal Science, Federal University of Goi�s Goi�nia, Goi�s, Brazil, 2State University of Goi�s S�o Lu�s de Montes Belos, Goi�s, Brazil, 3Maroca Dairy Industry Piranhas, Goi�s, Brazil, 4Food Research Center, School of Veterinary Medicine and Animal Science, Federal University of Goi�s Goi�nia, Goi�s, Brazil.

The notion of one health has been discussed and increasingly demanded in the environmental context, for this reason, care with the use of antimicrobials in all areas of activity is preponderant to minimize the progression of bacterial resistance. Milk is widely consumed by the world population, especially for its nutritional value. However, the presence of chemical residues is a common finding in some countries such as Brazil, preventing direct consumption, and impairing its use on the dairy derivatives products due to the risks to the consumer's health. Therefore, the aim of this work was to highlight the use of antimicrobials in dairy farms in the state of Goi�s, in the middle west of Brazil, assessing the potential risk to public health. The antimicrobials use in cattle were analyzed in 132 dairy farms in 33 municipalities in the state of Goi�s-Brazil. Farm owners or workers were interviewed by applying a structured questionnaire with questions regarding production parameters and the use of antimicrobials on the property. Responses were analyzed using descriptive statistics and Pearson's chi-squared test (χ2). Among the 23 active ingredients of antimicrobials mentioned, tetracycline and penicillin were the most used in different rural properties. It was found that 61.4% of the interviewees did not know how to distinguish antimicrobials from other medications such as vermifuges, ectoparasiticides, and vitamins. The milk containing antimicrobial residues was commonly discarded by supplying it to other animals, such as calves, or together with the milking cleaning water, which was not treated. It became evident that in Goi�s dairy farms, the use of antimicrobials and the disposal of milk containing residues are commonly carried out inappropriately. Little care was taken with the dose, frequency, and duration of treatments, in addition to the lack of knowledge about the risks of developing resistant microorganisms to the drugs used. Such factors have a high potential for compromising the health of the environment, animals, and man.

Keywords: antibiotic residue, bacterial resistance, public health.