Resistance to all chemical groups of acaricides in a single isolate of <i>Rhipicephalus microplus</i> in Mato Grosso do Sul, Brazil

Valsoni, Luiza Mendes; Freitas, Mariana Green de; Echeverria, Jéssica Teles; Borges, Dyego Gonçalves Lino; Tutija, Juliane Francielle; Borges, Fernando de Almeida

doi:10.1080/01647954.2020.1765867

Cited by 30 publications

(9 citation statements)

References 19 publications

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“…It is important to emphasize that the strategic control of the bovine tick aims to use acaricides (in the Brazilian cerrado), considering the tick's life cycle and its relationships with environmental variations (temperature and humidity), population dynamics, especially seasonality, to identify when the population of ticks is at the most vulnerable stage to control (Andreotti et al, 2016), and the doses of acaricides were used according to the manufacturer's recommendation. Scientific evidence indicates that the indiscriminate use of acaricides has resulted in populations of R. microplus resistant to chemical treatment (Rodrigues et al, 2018;Higa et al, 2019;Valsoni et al, 2020). The values of health costs increase, in different systems, due to the fact that as the technological level of the systems increases, so does the number of animals and, consequently, the amount of acaricides in the different systems.…”

Section: Discussionmentioning

confidence: 99%

Bioeconomic simulation of Rhipicephalus microplus infestation in different beef cattle production systems in the Brazilian Cerrado

Calvano

Brumatti

Barros

et al. 2021

Agricultural Systems

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Section: Discussionmentioning

confidence: 99%

Bioeconomic simulation of Rhipicephalus microplus infestation in different beef cattle production systems in the Brazilian Cerrado

Calvano

Brumatti

Barros

et al. 2021

Agricultural Systems

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“…112 Recent reports have described isolates of cattle tick in Brazil that are resistant to all of these chemical classes as well as fluazuron. 113,114 Control of the buffalo fly appears to not be under immediate threat while MLs and OPs remain effective. However, resistance to OPs has been reported in the closely related horn fly in the USA.…”

Section: The Outlookmentioning

confidence: 99%

“…Resistance to SPs, OPs, amitraz and MLs is widespread in cattle tick populations across the world, particularly in Latin America and South America 112 . Recent reports have described isolates of cattle tick in Brazil that are resistant to all of these chemical classes as well as fluazuron 113,114 …”

Section: The Outlookmentioning

confidence: 99%

The current status and outlook for insecticide, acaricide and anthelmintic resistances across the Australian ruminant livestock industries: assessing the threat these resistances pose to the livestock sector

Kotze

Hunt

2023

Aust Veterinary J

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The Australian ruminant livestock industries are faced with the need to control parasitic infectious diseases that can seriously impact the health of animals. However, increasing levels of resistance to insecticides, anthelmintics and acaricides are substantially reducing the ability to control some of these parasites. Here we review the current situation with regard to chemical resistances in parasites across the various sectors of the Australian ruminant livestock industries and assess the level of threat that these resistances pose to the sustainability of these sectors in the short to long terms. We also look at the extent to which testing for resistance occurs across the various industry sectors, and hence how well‐informed these sectors are of the extent of chemical resistance. We examine on‐farm management practices, breeding of parasite‐resistant animals, and non‐chemical therapeutics that may act as short to long term means to reduce the current reliance on chemicals for parasite control. Finally, we look at the balance between the prevalence and magnitude of current resistances and the availability and adoption rates of management, breeding and therapeutic alternatives in order to assess the parasite control outlook for the various industry sectors.

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“…The control of R. microplus is carried out using synthetic acaricides. However, the constant and sometimes indiscriminate use of these products has caused strong selective pressure, accelerating the selection and development of populations resistant to almost all synthetic classes available on the market, including registration of multidrug‐resistant populations (Agwunobi, Yu, & Liu, 2021; Klafke et al, 2017; Reck et al, 2014; Sagar et al, 2020; Upadhaya et al, 2020; Valsoni et al, 2020; Vilela, Feitosa, Bezerra, Klafke, & Riet‐Correa, 2020). In the midst of indiscriminate acaricide resistance, it is fundamental to carry out laboratory tests to assess the acaricide resistance profile of a given tick population, and consequent indication of the most efficient product to control the tested tick population as well as tracking the product's efficiency over the years (Furlong, Martins, & Prata, 2007; Gonzaga et al, 2022; Martins, 2004).…”

Section: Introductionmentioning

confidence: 99%

Automatic method based on deep learning to identify and account Rhipicephalus microplus larval hatching

Santos

Tavares

Klafke

et al. 2023

Medical Vet Entomology

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Reports of Rhipicephalus microplus resistant populations worldwide have increased extensively, making it difficult to control this ectoparasite. The adult immersion test, commonly used to screen for acaricide resistance, produces the results only after 40 days of the tick collection because it needs the eggs to be laid and larvae to hatch. The present study aims to develop an automatic method, based on deep learning, to predict the hatching of R. microplus larva based on egg morphology. Initially, the time course of embryonic development of tick eggs was performed to discriminate between viable and non‐viable eggs. Secondly, using artificial intelligence deep learning techniques, a method was developed to classify and count the eggs. The larval hatching rate of three populations of R. microplus was evaluated for the software validation process. Groups of three and six images of eggs with 12 days of embryonic development were submitted to the software to predict the larval hatching percent automatically. The results obtained by the software were compared with the prediction results of the hatching percentage performed manually by the specialist and with the results of the hatching percentage of larvae obtained in the biological assay. The group with three images of each population submitted to the software for automatic prediction of the larval hatching percent presented mean values of 96.35% ± 3.33 (Piracanjuba population), 95.98% ± 3.5 (Desterro population) and 0.0% ± 0.0 (Barbalha population). For groups with six images, the values were 94.41% ± 3.84 (Piracanjuba population), 95.93% ± 2.36 (Desterro population) and 0.0% ± 0.0 (Barbalha population). Biological assays showed the following hatching percentage values: 98% ± 1.73 (Piracanjuba population); 96% ± 2.1 (Desterro population); and 0.14% ± 0.25 (Barbalha population). There was no statistical difference between the evaluated methods. The automatic method for predicting the hatching percentage of R. microplus larvae was validated and proved to be effective, with considerable reduction in time to obtain results.

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Resistance to all chemical groups of acaricides in a single isolate of Rhipicephalus microplus in Mato Grosso do Sul, Brazil

Cited by 30 publications

References 19 publications

Bioeconomic simulation of Rhipicephalus microplus infestation in different beef cattle production systems in the Brazilian Cerrado

Bioeconomic simulation of Rhipicephalus microplus infestation in different beef cattle production systems in the Brazilian Cerrado

The current status and outlook for insecticide, acaricide and anthelmintic resistances across the Australian ruminant livestock industries: assessing the threat these resistances pose to the livestock sector

Automatic method based on deep learning to identify and account Rhipicephalus microplus larval hatching

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