Abstract:
:Acaricide resistance is one of the greatest threats towards the successful control of vector ticks worldwide. Communal farmers of Zimbabwe use amitraz as the most common acaricide with occasional usage of pyrethroids and organophosphates. As a strategy towards developing an effective acaricide resistance management system in Zimbabwe, screening was done by genotyping Rhipicephalus microplus tick populations using molecular markers associated with resistance to these chemicals. The frequency of the mutant allele for the octopamine/tyramine receptor marker associated with amitraz resistance was high (0.55) and a large proportion 78.5% (288/367) of heterozygote genotypes were observed indicating balancing selection. Of the communal dipping tanks where R. microplus occurred 37.8% (39/103) showed complete resistance genotypes for amitraz. The carboxylesterase marker that has been associated with resistance to organophosphate and pyrethroids indicated no selection pressure in these chemical groups with a low frequency (0.052) of the mutant allele and 89.6% (329/367) sampled ticks showing homozygous susceptibility genotypes. Heterozygous genotypes were present at 27.2% (28/103) of the dipping tanks. The L641 mutation in the voltage-gated sodium channel gene associated with pyrethroid resistance was not detected in Zimbabwean samples. This would suggest a different mechanism of resistance to pyrethroids in these tick populations. Sequence analysis of the octopamine/tyramine receptor gene revealed the presence of other mutations in this region, it will be important to investigate their association with amitraz resistance. These results present the first molecular genotyping of resistance profiles of R. microplus tick populations from Zimbabwe.
journal_name
Ticks Tick Borne Disjournal_title
Ticks and tick-borne diseasesauthors
Sungirai M,Baron S,Moyo DZ,De Clercq P,Maritz-Olivier C,Madder Mdoi
10.1016/j.ttbdis.2017.10.017subject
Has Abstractpub_date
2018-01-01 00:00:00pages
2-9issue
1eissn
1877-959Xissn
1877-9603pii
S1877-959X(17)30313-8journal_volume
9pub_type
杂志文章abstract::A cross-sectional study combining different serological and molecular techniques for the detection of Ehrlichia species in dogs and their ticks was carried out with data from all regions of Costa Rica. A seroprevalence of 32.1% (131/408), and infection with E. canis of 3.2% (13/407) was found, whereas 6.9% (9/130) of ...
journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
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journal_title:Ticks and tick-borne diseases
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doi:10.1016/j.ttbdis.2016.01.015
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2012.10.024
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2012.10.027
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journal_title:Ticks and tick-borne diseases
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doi:10.1016/j.ttbdis.2012.10.040
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2013.08.003
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journal_title:Ticks and tick-borne diseases
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doi:10.1016/j.ttbdis.2015.01.003
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2015.07.001
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2012.09.002
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2014.12.003
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2018.10.012
更新日期:2019-02-01 00:00:00
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2015.03.011
更新日期:2015-04-01 00:00:00
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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更新日期:2021-01-19 00:00:00
abstract::In this letter we respond to correspondence and clarify the intent and importance of our article. ...
journal_title:Ticks and tick-borne diseases
pub_type: 评论,信件
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更新日期:2016-03-01 00:00:00
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2009.11.002
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2010.09.004
更新日期:2010-12-01 00:00:00
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2018.02.010
更新日期:2018-05-01 00:00:00
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2017.05.003
更新日期:2017-08-01 00:00:00
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journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
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更新日期:2020-03-01 00:00:00
abstract::Basic knowledge of species, ecological preferences and behavior of ticks in preserved rainforests are scanty. We herein describe species richness, seasonal activity, altitude influence and questing height of ticks along 3375 m of animal trails within the largest remain of inland Atlantic rainforest in Brazil, the Igua...
journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
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abstract::Hepatozoon canis is a blood parasite of the suborder Adeleorina infecting wild and domestic canids. Transmission occurs by oral uptake of Rhipicephalus sanguineus sensu lato vector ticks infected with H. canis, but vertical transmission is also assumed to be possible. In German foxes, a high prevalence of H. canis has...
journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2020.101520
更新日期:2020-11-01 00:00:00
abstract::Surveillance indicates that tick-borne diseases are a common problem in the United States. Nevertheless, little is known regarding the experience or management practices of healthcare providers who treat these conditions. The purpose of the present study was to characterize the frequency of tick-borne diseases in clin...
journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2014.01.008
更新日期:2014-06-01 00:00:00