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Title: Acaricide resistance and strategies to mitigate economic impact of the southern cattle fever tick (Rhipicephalus microplus) on livestock production systems in the Americas

Author
item Perez De Leon, Adalberto - Beto
item RODRIGUEZ VIVAS, IVAN - Autonomous University Of Yucatan
item ROMERO SALAS, DORA - University Of Veracruz
item ANDREOTTI, RENATO - Embrapa
item ROSARIO CRUZ, RODRIGO - Instituto Nacional De Investigaciones Forestales Y Agropecuarias (INIFAP)
item CHAMPARRO, JENNY - University Of Antioquia
item KLAFKE, GUILHERME - Desiderio Finamore Veterinary Research Institute (FEPAGRO)
item VILLAR, DAVID - University Of Antioquia
item COSTA-JUNIOR, LIVIO - Federal University - Brazil
item SOLTERO, FRED - Animal And Plant Health Inspection Service (APHIS)
item Temeyer, Kevin
item URDAZ, JOSE - Animal And Plant Health Inspection Service (APHIS)
item Li, Andrew
item CANABAL, CARMEN - Puerto Rico Department Of Agriculture
item GARCIA VAZQUEZ, ZEFERINO - Instituto Nacional De Investigaciones Forestales Y Agropecuarias (INIFAP)
item GRISI, LAERTE - Universidade Federal Do Rio De Janeiro
item ALVAREZ, JOSE - National University Of Argentina
item RICARDO MARTINS, JOAO - Desiderio Finamore Veterinary Research Institute (FEPAGRO)
item ROMERO, SARA - National University Of Argentina
item MESSENGER, MATTHEW - Animal And Plant Health Inspection Service (APHIS)
item Guerrero, Felicito
item LEITE, ROMARIO - Universidade Federal De Minas Gerais
item Miller, Robert

Submitted to: International Congress of Parasitologists
Publication Type: Abstract Only
Publication Acceptance Date: 5/12/2014
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: BACKGROUND: The southern cattle fever tick (SCFT), Rhipicephalus microplus, is considered the most economically important external parasite of livestock worldwide. SCFT populations resistant to acaricides complicate efforts to enhance the productivity of livestock. Here, acaricide resistance is summarized and integrated approaches in the Americas to mitigate the impact of the SCFT on livestock production systems are updated. METHODS: Trends in acaricide resistance among SCFT populations across the continent were analyzed. Adaptive strategies in the context of recent trends in livestock production systems that involve ranching of cattle with wild ruminant ungulate species was summarized. Economic impact data on livestock production were compiled. RESULTS: An increase in the frequency of resistance to multiple classes of acaricides is alarming. Multiple resistance in the SCFT has been recorded across the Americas. A population of SCFT was shown to be resistant to 6 classes of acaricides in Brazil where there are ~212 million cattle and the economic impact of the SCFT is estimated to be USD 3.2 billion. Efforts underway in several countries aim to integrate diverse technologies to manage the problem of multiple acaricide resistance. CONCLUSIONS: Acaricide resistance in the SCFT is a problem that has grown in complexity. Biological and epidemiological aspects of multiple acaricide resistance remain to be fully understood. Research and development of integrated SCFT management strategies in the Americas is facilitated by the commercialization of nonchemical technologies. This approach is required to mitigate the economic impact of the SCFT and for sustainable livestock production.