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Experimental & Applied Acarology

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https://www.readbyqxmd.com/read/28755284/morphological-anomalies-in-ixodes-ricinus-and-ixodes-inopinatus-collected-from-tick-borne-encephalitis-natural-foci-in-central-europe
#1
Lidia Chitimia-Dobler, Malena Bestehorn, Michael Bröker, Johannes Borde, Tomas Molcanyi, Nanna Skaarup Andersen, Martin Pfeffer, Gerhard Dobler
In 2015, 0.02% nymphs displayed anomalies (ectromely) out of the 6744 collected ticks as part of a tick-borne encephalitis program in Germany. In 2016, questing Ixodes ricinus (n = 14,527) and Ixodes inopinatus (n = 75) ticks were collected by flagging as part of a tick-borne encephalitis program in Germany, Slovakia and Denmark. A total of 278 (1.9%) out of 14,602 nymph and adult ticks showed morphological anomalies. The anomalies were divided into general anomalies (body asymmetry) and local anomalies (anomalies of appendages, malformation of capitulum, exoskeleton anomalies and anal groove deformation) with nymphs being the most affected life stage...
July 28, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28752482/is-body-size-important-seasonal-changes-in-morphology-in-two-grass-feeding-abacarus-mites
#2
Alicja Laska, Brian G Rector, Lechosław Kuczyński, Anna Skoracka
Overwintering strategies in herbivorous mites (Acariformes: Eriophyoidea) are poorly understood. A study of two Abacarus spp. was conducted to compare body size parameters of adult females in different seasons. Mites of Abacarus n. sp. (under description) and A. lolli were sampled from Bromopsis inermis and Lolium perenne, respectively, in April, September and December of 2001 in Poznań, Poland; 21 morphological traits were measured for each specimen. A principal component analysis revealed significant differences in body size parameters between collection dates, with larger females collected in December in both species...
July 27, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28752481/complexity-adaptations-and-variations-in-the-secondary-insemination-system-of-female-dermanyssina-mites-acari-anactinothrichida-gamasida-the-case-of-afrocypholaelaps-africana
#3
A Di Palma, O D Seeman, G Alberti
Gamasine mites, mainly of the taxon Dermanyssina, possess a secondarily evolved insemination system (sperm access system), of which there are two, generally recognized, structurally different types, the laelapid- and the phytoseiid-type. The ultrastructure of the female sperm access system in Afrocypholaelaps africana is described. It consists of paired insemination pores, opening between the bases of legs three and four, and paired cuticle-lined tubules that converge into a large, sack-like spermatheca, remarkably cuticle-lined as well...
July 27, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28748336/continuous-release-of-oregano-oil-effectively-and-safely-controls-varroa-destructor-infestations-in-honey-bee-colonies-in-a-northern-climate
#4
Qodratollah Sabahi, Hanan Gashout, Paul G Kelly, Ernesto Guzman-Novoa
The ectoparasitic mite Varroa destructor is responsible for the death of millions of honey bee (Apis mellifera) colonies worldwide. Testing potential miticide compounds with different delivery methods that effectively control V. destructor and have low toxicity for honey bees is crucial to manage this parasite in hives. We determined the varroacide efficacy of three natural compounds delivered to hives with three application methods over a 4-week period. Oxalic acid in a sucrose solution was applied impregnated in cardboard (T1)...
July 26, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28623498/minimal-barcode-distance-between-two-water-mite-species-from-madeira-island-a-cautionary-tale
#5
Ricardo García-Jiménez, Jose Luis Horreo, Antonio G Valdecasas
In this work, we compare morphological and molecular data in their ability to distinguish between species of water mites (Acari, Prostigmata, Hydrachnidia). We have focused on the two species of the genus Lebertia inhabiting the island of Madeira. While traditional morphological traits were initially sufficient to distinguish between these two species, the molecular data were more dependable on the kind of analysis carried out. Single arbitrary genetic distance (e.g. a K2P distance below 2%) may lead to the conclusion that the specimens under study belong to the same species...
June 16, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28597314/deltamethrin-as-inductor-agent-of-precocious-ovarian-degeneration-in-rhipicephalus-sanguineus-s-l-acari-ixodidae-ticks
#6
Maria Izabel Camargo-Mathias, Natalia Rubio Claret Pereira, Camila da Silva Reis, Cristiane Regina de Almeida, Douglas Rodrigo Dos Santos Mendes, Giselle Bezerra de Araújo, Lays Postali, Tober Figueroa, Allan Roberto Fernandes Ferreira, Juan Parente Santos, Patrícia Rosa de Oliveira
The cosmopolitan species Rhipicephalus sanguineus s.l. is one of the most widely distributed ticks all over the world. These ectoparasites are vectors of several pathogens and cause significant direct damage to their hosts. The biological success of these ectoparasites has been attributed to their ovaries and salivary glands, organs that ensure their survival in various environmental conditions. The importance of the ovaries in ticks is that, after mating, the individuals are able to lay approximately three thousand eggs...
June 8, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28597313/cellular-response-in-the-tick-feeding-site-in-crossbred-cattle-artificially-infested-by-rhipicephalus-microplus
#7
Jair Rodini Engracia Filho, Chiara Domingues Araújo, Gabriela Nishihara Pinto, Yann Henrique Mendes, Gervasio Henrique Bechara
Ticks and tick-borne diseases are of global importance and can cause serious economic losses to cattle-raising businesses. However, only few attempts have been made to describe the relationships between various cellular immune components and tick counts of, and therefore resistance to, Rhipicephalus microplus. The present study evaluated the late inflammatory cellular response and dermal dendritic cells at the attachment site in naturally presensitized bovines, artificially infested by R. microplus ticks. Twenty-two crossbred (Holstein × Gir) male experimental cattle were artificially infested with approximately 10,000 larvae of R...
June 8, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28593480/difference-in-susceptibility-of-small-rodent-host-species-to-infestation-by-ixodes-ricinus-larvae
#8
László Egyed
In a laboratory experiment (repeated eight times) individuals of six small rodent species were mixed with 500 Ixodes ricinus larvae for 24 h, than over a 3-day-long observation period engorged ticks fallen from individually kept rodents were counted. Forty engorged larvae fell from the hosts, 25% from striped field mice, 32.5% from house mice, 22.5% from common voles, 10% from bank voles, while wood mouse and steppe mouse proved to be almost free of successfully infesting ticks (both 5%). Statistical analysis indicated, that tick burden differed significantly among host species...
June 7, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28589297/sulfate-turpentine-a-resource-of-tick-repellent-compounds
#9
Fredrik Schubert, Katinka Pålsson, Ellen Santangelo, Anna-Karin Borg-Karlson
Compounds with tick (Ixodes ricinus) repellent properties were isolated from sulfate turpentine consisting of Norway spruce (80%) and Scots pine (20%) from southern Sweden. The turpentine was divided into two fractions by distillation under reduced pressure resulting in one monoterpene hydrocarbon fraction and a residual containing higher boiling terpenoids. The monoterpene fraction was further oxidized with SeO2 to obtain oxygenated monoterpenes with potential tick repellent properties. The oxidized fraction and the high boiling distillation residual were each separated by medium pressure liquid chromatography...
June 6, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28573423/first-report-of-spinose-ear-tick-otobius-megnini-acari-argasidae-in-sweden
#10
Anders Lindström, Johanna Lindström
A dog that had travelled to Sweden was inspected by a veterinarian. In one ear canal a tick was found. It was later identified as a spinose ear tick, Otobius megnini. In this case report we also review the previously known reports of O. megnini in Europe and the recent introduction and spread in Turkey.
June 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28752480/evaluation-of-three-adjuvants-with-respect-to-both-adverse-effects-and-the-efficacy-of-antibody-production-to-the-bm86-protein
#11
Julie Petermann, Romain Bonnefond, Isabelle Mermoud, Dewi Rantoen, Laure Meynard, Christopher Munro, Linda H L Lua, Thomas Hüe
Cattle tick infestations remain an important burden for farmers in tropical area like in New Caledonia. With the development of acaricide resistance, tick vaccines should be an attractive alternative to control ticks but their efficacy needs to be improved. In this study three adjuvants were studied in an experimental tick vaccine with a Bm86 protein to assess their performance in terms of antibody productions and adverse reactions following vaccinations. The water-in-oil adjuvant ISA 61 VG led to higher antibody titers compared to a water-in-oil-in-water adjuvant ISA 201 VG and an aqueous polymeric adjuvant Montanide Gel 01...
July 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28717996/patterns-of-oribatid-mite-species-diversity-testing-the-effects-of-elevation-area-and-sampling-effort
#12
Levan Mumladze, Maka Murvanidze, Mark Maraun
Elevational gradients in species diversity and species area relationships are two well established patterns that are not mutually exclusive in space and time. Elevation and area are both considered as good proxies to detect and characterize the patterns of species diversity distribution. However, such studies are hampered by the incomplete biodiversity data available for ecologists, which may affect the pattern perceptions. Using the large dataset of oribatid mite communities sampled in Georgia, we tested the effects of altitude and area on species distribution using various approaches, while explicitly considering the biases from sampling effort...
July 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28707033/impact-of-constant-versus-fluctuating-temperatures-on-the-development-and-life-history-parameters-of-tetranychus-urticae-acari-tetranychidae
#13
M S Y I Bayu, M S Ullah, Y Takano, T Gotoh
The impact of daily temperature fluctuations on arthropod life history parameters is inadequately studied compared with the ample amount of research that has been conducted on the effects of constant temperatures. Fluctuating temperatures are likely to be more realistic, as they are ecologically more similar to what these arthropods experience in nature. Here, we compared the impact of 11 constant temperatures that ranged from 10 to 35 °C with fluctuating temperatures with the same corresponding mean temperature and an amplitude of 10 °C between high (12 h) and low (12 h) temperatures on the development and life history parameters of Tetranychus urticae under continuous light conditions...
July 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28656486/abamectin-treatment-affects-glutamate-decarboxylase-expression-and-induces-higher-gaba-levels-in-the-citrus-red-mite-panonychus-citri
#14
Wei Dou, Wen-Kai Xia, Jin-Zhi Niu, Jin-Jun Wang
The citrus red mite, Panonychus citri, is one of the most economically and globally destructive mite pests of citrus. Acaricide resistance has been a growing problem in controlling this pest. As the main inhibitory neurotransmitter in organisms, γ-aminobutyric acid (GABA) is synthesized from the amino acid glutamate by the action of glutamate decarboxylases (GADs). In the present study, one novel GAD gene, PcGAD, was identified and characterized from P. citri. The opening reading frame of PcGAD contained 1548 nucleotides that encode 515 amino acids...
July 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28593481/molecular-survey-of-coxiella-burnetii-in-wildlife-and-ticks-at-wildlife-livestock-interfaces-in-kenya
#15
David Ndeereh, Gerald Muchemi, Andrew Thaiyah, Moses Otiende, Samer Angelone-Alasaad, Michael J Jowers
Coxiella burnetii is the causative agent of Q fever, a zoonotic disease of public health importance. The role of wildlife and their ticks in the epidemiology of C. burnetii in Kenya is unknown. This study analysed the occurrence and prevalence of the pathogen in wildlife and their ticks at two unique wildlife-livestock interfaces of Laikipia and Maasai Mara National Reserve (MMNR) with the aim to determine the potential risk of transmission to livestock and humans. Blood from 79 and 73 animals in Laikipia and MMNR, respectively, and 756 and 95 ixodid ticks in each of the areas, respectively, was analysed...
July 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28634718/mite-communities-acari-mesostigmata-in-young-and-mature-coniferous-forests-after-surface-wildfire
#16
Jacek Kamczyc, Cezary Urbanowski, Emilia Pers-Kamczyc
Density, diversity and assemblage structure of Mesostigmata (cohorts Gamasina and Uropodina) were investigated in Scots pine forests differing in forest age (young: 9-40 years and mature: 83-101 years) in which wildfire occurred. This animal group belongs to the dominant acarine predators playing a crucial role in soil food webs and being important as biological control agents. In total, six forests (three within young and three within mature stands) were inspected in Puszcza Knyszyńska Forest Complex in May 2015...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28634717/morphological-diversification-among-island-populations-of-intertidal-mites-acari-oribatida-fortuyniidae-from-the-gal%C3%A3-pagos-archipelago
#17
Tobias Pfingstl, Julia Baumann
The intertidal oribatid mite species Alismobates galapagoensis and Litoribates caelestis occur on the archipelago of Galápagos. To test for morphological variation between populations of different islands, a comprehensive morphometric study was performed. Four A. galapagoensis populations from the islands Bartolomé, Isabela, Santa Cruz and San Cristobal, as well as two L. caelestis populations from Bartolomé and Santa Cruz were investigated. The L. caelestis populations did not show any significant differences whereas the A...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28573422/how-to-evaluate-the-potential-occurrence-of-intraguild-predation
#18
Morgana Maria Fonseca, Marta Montserrat, Celeste Guzmán, Inmaculada Torres-Campos, Angelo Pallini, Arne Janssen
Intraguild predation is the combination of exploitative competition and predation among potential competitors that use similar resources. It has the potential to shape population dynamics and community structure. Although there is much empirical evidence for the occurrence of intraguild predation in natural ecosystems, the study of its effects is mainly limited to short-term microcosm experiments. There is, therefore, certain skepticism about its actual significance in nature. A relevant concern is that there is no consensus regarding criteria to evaluate the possible occurrence of intraguild predation in short-term experiments, and methodological differences may therefore underlie apparent inconsistencies among studies...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497304/acaricidal-activity-of-havardia-albicans-and-caesalpinia-gaumeri-methanolic-leaf-extracts-on-rhipicephalus-microplus-and-its-toxicity-to-laboratory-animals
#19
José A Rosado-Aguilar, Roger I Rodríguez-Vivas, Rocío Borges-Argaez, Karen A Arjona-Cambranes
The acaricidal activity of methanolic extracts from the leaves of Havardia albicans (Kunth Britton and Rose) and Caesalpinia gaumeri (Greenm) were tested on the larvae and adults of the cattle tick Rhipicephalus microplus Canestrini using the larval immersion test and the adult immersion test, respectively. The toxicity of these extracts was also evaluated on laboratory animals using toxicity bioassays at different concentrations: skin irritability (500 mg/ml), acute oral toxicity (5000 mg/kg), ocular irritability (1000 mg/ml) and dermal toxicity (5000 mg/kg)...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497303/review-of-cattle-ticks-acari-ixodida-in-ivory-coast-and-geographic-distribution-of-rhipicephalus-boophilus-microplus-an-emerging-tick-in-west-africa
#20
O M Boka, L Achi, H Adakal, A Azokou, P Yao, Y G Yapi, M Kone, K Dagnogo, Y Y Kaboret
The exotic tick Rhipicephalus (Boophilus) microplus was discovered in Ivory Coast in 2007 and then gradually in other countries in West Africa. It is known to induce significant losses in farming and to replace other species of the same genus. In order to contribute to improve health and productivity of cattle in Ivory Coast regarding the emergence of this dreaded tick, a study was conducted to determine the current geographic distribution of the tick R. (B.) microplus and review cattle ticks in general. To this end, 23,460 ticks were collected from 180 farms located throughout the country...
May 11, 2017: Experimental & Applied Acarology
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