Economic losses caused by the use of low-efficacy anthelmintic drugs in growing heifers

  • Felipe Lamberti PivotoEmail author
  • Alfredo Skrebsky Cezar
  • Fernanda Silveira Flores Vogel
  • Camila Balconi Marques
  • Marta Elena Machado Alves
  • Camila Coelho Becker
  • Marta Lizandra do Rego Leal
Regular Articles


The aim of this study was to compare the economic revenue related to the use of low- or high-efficacy anthelmintic drugs within suppressive or strategic schemes of treatment in growing heifers. Heifers raised in a semi-intensive grazing system in southern Brazil were used. Levamisole and ivermectin were selected as the high- and the low-efficacy drugs, respectively, based on a previous efficacy test. Subsequently, these drugs were used within strategic (Strat; four times per year) or suppressive (Supp; once a month) treatment regimens in the heifers, and their liveweight and eggs per gram of feces counts were monthly evaluated during a 13-month period. The total costs of the treatments and their cost-benefit ratio in regard to liveweight gain were calculated. Final mean liveweight gains (kg) observed were 126.7 (Strat-Low), 133.6 (Supp-Low), 141.3 (Strat-High), 142.9 (Supp-High), and 125.8 (Control). Treatments with a high-efficacy drug resulted in monetary gains of US$ 19.56 (Strat-High) and US$ 14.98 (Supp-High), but Supp-Low and Strat-Low treatments caused economic losses. Total cost of the efficacy test (US$ 374.79) could be paid by the additional liveweight gain of 20 heifers from the Strat-High group. These results showed that it would be preferable not to treat the heifers against GIN if compared with treating them with a low-efficacy drug. In addition, we showed that the use of four treatments per year with a high-efficacy drug—selected by efficacy test—resulted in a profitable management to control GIN in growing heifers raised in a semi-intensive gazing system in southern Brazil.


Cattle Economic Nematodes Parasite resistance Weight gain 



The authors are grateful for the support of equipment necessary for the accomplishment of parasitological techniques of Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  • Felipe Lamberti Pivoto
    • 1
    Email author
  • Alfredo Skrebsky Cezar
    • 2
  • Fernanda Silveira Flores Vogel
    • 3
  • Camila Balconi Marques
    • 3
  • Marta Elena Machado Alves
    • 3
  • Camila Coelho Becker
    • 4
  • Marta Lizandra do Rego Leal
    • 1
  1. 1.Departamento de Clínica de Grandes Animais (DCGA)Universidade Federal de Santa Maria (UFSM)Santa MariaBrazil
  2. 2.Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI)IjuiBrazil
  3. 3.Departamento de Medicina Veterinária Preventiva (DMVP), Centro de Ciências Rurais (CCR)UFSMSanta MariaBrazil
  4. 4.Departamento de AgrometeorologiaUFSMSanta MariaBrazil

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