Jorgelina Torrents , Macarena Sarli , Maria V. Rossner , Nicolás Morel , Santiago Nava
{"title":"阿根廷沿海地区微头虫对杀螨剂的抗性图谱","authors":"Jorgelina Torrents , Macarena Sarli , Maria V. Rossner , Nicolás Morel , Santiago Nava","doi":"10.1016/j.vprsr.2025.101344","DOIUrl":null,"url":null,"abstract":"<div><div>The aim of this work was to perform an analysis of the geographical dispersion of <em>Rhipicephalus microplus</em> resistance to acaricides in the littoral region of Argentina, which is the most favorable area for the development of this tick in the Argentinean territory. The data were obtained through the application of <em>in vitro</em> bioassays. Larval immersion test (LIT) were the bioassays used to detect resistance to ivermectin and fipronil, while adult immersion tests (AIT) were employed for the diagnosis of resistance to pyrethroids, amitraz and the combinations of cypermethrin with organophosphates. Cases of resistance to ivermectin were determined in localities from all the provinces of the littoral region (except for Formosa province). Samples from Corrientes, Entre Rios, and Santa Fe provinces were also determined as resistant to fipronil. Resistance to cypermethrin was a common result for all the tested samples. Samples from Corrientes and Santa Fe provinces were determined as resistant to amitraz and to the combinations of cypermethrin with organophosphates, and samples from Entre Rios province were diagnosed as resistant to amitraz. Muti-resistant population of <em>R. microplus</em> were detected in three provinces. The widespread dissemination of <em>R. microplus</em> resistance to acaricides in the littoral region of Argentina may be associated with a high frequency of annual chemical treatments, which is a consequence of different factors as ecological conditions very favorable to <em>R. microplus,</em> the free movement of cattle without mandatory tick control between farms within the tick infested area, and the presence of cattle breeds susceptible to tick infestation.</div></div>","PeriodicalId":23600,"journal":{"name":"Veterinary parasitology, regional studies and reports","volume":"65 ","pages":"Article 101344"},"PeriodicalIF":1.4000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A mapping of Rhipicephalus microplus resistance to acaricides in the littoral region of Argentina\",\"authors\":\"Jorgelina Torrents , Macarena Sarli , Maria V. Rossner , Nicolás Morel , Santiago Nava\",\"doi\":\"10.1016/j.vprsr.2025.101344\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The aim of this work was to perform an analysis of the geographical dispersion of <em>Rhipicephalus microplus</em> resistance to acaricides in the littoral region of Argentina, which is the most favorable area for the development of this tick in the Argentinean territory. The data were obtained through the application of <em>in vitro</em> bioassays. Larval immersion test (LIT) were the bioassays used to detect resistance to ivermectin and fipronil, while adult immersion tests (AIT) were employed for the diagnosis of resistance to pyrethroids, amitraz and the combinations of cypermethrin with organophosphates. Cases of resistance to ivermectin were determined in localities from all the provinces of the littoral region (except for Formosa province). Samples from Corrientes, Entre Rios, and Santa Fe provinces were also determined as resistant to fipronil. Resistance to cypermethrin was a common result for all the tested samples. Samples from Corrientes and Santa Fe provinces were determined as resistant to amitraz and to the combinations of cypermethrin with organophosphates, and samples from Entre Rios province were diagnosed as resistant to amitraz. Muti-resistant population of <em>R. microplus</em> were detected in three provinces. The widespread dissemination of <em>R. microplus</em> resistance to acaricides in the littoral region of Argentina may be associated with a high frequency of annual chemical treatments, which is a consequence of different factors as ecological conditions very favorable to <em>R. microplus,</em> the free movement of cattle without mandatory tick control between farms within the tick infested area, and the presence of cattle breeds susceptible to tick infestation.</div></div>\",\"PeriodicalId\":23600,\"journal\":{\"name\":\"Veterinary parasitology, regional studies and reports\",\"volume\":\"65 \",\"pages\":\"Article 101344\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2025-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Veterinary parasitology, regional studies and reports\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2405939025001522\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PARASITOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Veterinary parasitology, regional studies and reports","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405939025001522","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PARASITOLOGY","Score":null,"Total":0}
A mapping of Rhipicephalus microplus resistance to acaricides in the littoral region of Argentina
The aim of this work was to perform an analysis of the geographical dispersion of Rhipicephalus microplus resistance to acaricides in the littoral region of Argentina, which is the most favorable area for the development of this tick in the Argentinean territory. The data were obtained through the application of in vitro bioassays. Larval immersion test (LIT) were the bioassays used to detect resistance to ivermectin and fipronil, while adult immersion tests (AIT) were employed for the diagnosis of resistance to pyrethroids, amitraz and the combinations of cypermethrin with organophosphates. Cases of resistance to ivermectin were determined in localities from all the provinces of the littoral region (except for Formosa province). Samples from Corrientes, Entre Rios, and Santa Fe provinces were also determined as resistant to fipronil. Resistance to cypermethrin was a common result for all the tested samples. Samples from Corrientes and Santa Fe provinces were determined as resistant to amitraz and to the combinations of cypermethrin with organophosphates, and samples from Entre Rios province were diagnosed as resistant to amitraz. Muti-resistant population of R. microplus were detected in three provinces. The widespread dissemination of R. microplus resistance to acaricides in the littoral region of Argentina may be associated with a high frequency of annual chemical treatments, which is a consequence of different factors as ecological conditions very favorable to R. microplus, the free movement of cattle without mandatory tick control between farms within the tick infested area, and the presence of cattle breeds susceptible to tick infestation.
期刊介绍:
Veterinary Parasitology: Regional Studies and Reports focuses on aspects of veterinary parasitology that are of regional concern, which is especially important in this era of climate change and the rapid and often unconstrained travel of people and animals. Relative to regions, this journal will accept papers of the highest quality dealing with all aspects of disease prevention, pathology, treatment, epidemiology, and control of parasites within the field of veterinary medicine. Also, case reports will be considered as they add to information related to local disease and its control; such papers must be concise and represent appropriate medical intervention. Papers on veterinary parasitology from wildlife species are acceptable, but only if they relate to the practice of veterinary medicine. Studies on vector-borne bacterial and viral agents are suitable, but only if the paper deals with vector transmission of these organisms to domesticated animals. Studies dealing with parasite control by means of natural products, both in vivo and in vitro, are more suited for one of the many journals that now specialize in papers of this type. However, due to the regional nature of much of this research, submissions may be considered based upon a case being made by the author(s) to the Editor. Circumstances relating to animal experimentation must meet the International Guiding Principles for Biomedical Research Involving Animals as issued by the Council for International Organizations of Medical Sciences (obtainable from: Executive Secretary C.I.O.M.S., c/o W.H.O., Via Appia, CH-1211 Geneva 27, Switzerland).