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Experimental & Applied Acarology

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https://www.readbyqxmd.com/read/28255923/transmission-differentials-for-multiple-pathogens-as-inferred-from-their-prevalence-in-larva-nymph-and-adult%C3%A2-of-ixodes-ricinus-acari-ixodidae
#1
Per M Jensen, Christian S Christoffersen, Sara Moutailler, Lorraine Michelet, Kirstine Klitgaard, Rene Bødker
Ixodes ricinus serves as vector for a range of microorganisms capable of causing clinical illness in humans. The microorganisms occur in the same vector populations and are generally affected by the same tick-host interactions. Still, the instars have different host preferences which should manifest in different transmission patterns for various microorganisms in the tick populations, i.e., most microorganisms increase in prevalence rate from larvae to nymphs because their reservoirs are among small mammals and birds that serve as blood hosts for larvae...
March 2, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28251410/detection-of-amitraz-and-malathion-resistance-in-field-populations-of-rhipicephalus-boophilus-microplus-acari-ixodidae-in-jammu-region-of-india
#2
S Dutta, R Godara, R Katoch, A Yadav, M Katoch, N K Singh
Detection of resistance levels against amitraz and malathion in Rhipicephalus (Boophilus) microplus collected from four districts of Jammu region (India) was carried out using the adult immersion test. The regression graphs of probit mortality of ticks plotted against log values of concentration of drugs were utilised for the determination of slope of mortality, lethal concentration for 50% (LC50), 95% (LC95) and resistance factor (RF). On the basis of the data generated on variables (mortality, egg mass weight, reproductive index and percentage inhibition of oviposition) the resistance level was categorised as I, II, III and IV...
March 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28251408/in-vitro-assessment-of-the-acaricidal-activity-of-piper-longum-piper-nigrum-%C3%A2-and-zingiber-officinale-extracts-against-hyalomma-anatolicum-ticks
#3
Nirbhay K Singh, S P S Saini, Harkirat Singh, Jyoti, S K Sharma, S S Rath
Ticks and tick-borne diseases are a major constraint for the sustainable cattle industry in the tropical and subtropical regions including the Indian subcontinent. The development of resistance to most of the commonly used acaricides leads to an attempt to screen plant extracts and their combinations for their possible acaricidal activity to develop an eco-friendly tick control alternative. An alcoholic and various aqueous extracts of Piper longum, Piper nigrum and Zingiber officinale and their combinations were evaluated for acaricidal activity against the three-host ixodid tick, Hyalomma anatolicum by larval immersion test using 14-21 days old unfed larvae...
March 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28247071/host-plant-variety-and-not-climate-determines-the-establishment-and-performance-of-aceria-lantanae-eriophyidae-a-biological-control-agent-of-lantana-camara-in-south-africa
#4
Ludzula Mukwevho, David Simelane, Terence Olckers
The flower-galling mite Aceria lantanae (Cook) (Trombidiformes: Eriophyidae) was released for the biological control of Lantana camara L. (Verbenaceae) in South Africa in 2007, but has displayed variable and patchy establishment throughout the weed's range. Surveys were undertaken in 2013-2014, both seasonally and during the mite's peak infestation periods, to determine the influence of climatic factors on its performance. Although there were seasonal differences in the percentages of mite-infested inflorescences, these did not differ significantly between altitudinal zones...
February 28, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28185030/detrimental-effect-of-deltamethrin-on-the-central-nervous-system-synganglion-of-rhipicephalus-sanguineus-ticks
#5
Melissa Carolina Pereira, Ana Elisa Gasparotto, Juliana Paneczko Jurgilas, Letícia Aurora Coelho da Silva, Mayara Cristina Pereira, Samantha Santos Silveira, Thays Neigri Silva, André Arnosti, Maria Izabel Camargo-Mathias
Ticks are ectoparasites of medical and veterinary importance, which transmit many infectious agents, causing significant damage to the hosts. The "dog tick" Rhipicephalus sanguineus is responsible for transmitting several pathogens to dogs, motivating researchers to investigate efficient and sustainable control methods. Currently, chemical acaricides currently in use target the central nervous system (synganglion), which is responsible for controlling all the systemic functions of the ticks. Here, the neurotoxic potential of deltamethrin on the synganglion of unfed R...
February 9, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28127642/influence-of-the-spatial-heterogeneity-in-tick-abundance-in-the-modeling-of-the-seasonal-activity-of-ixodes-ricinus-nymphs-in-western-europe
#6
Julie Cat, Frédéric Beugnet, Thierry Hoch, Frans Jongejan, Aurélie Prangé, Karine Chalvet-Monfray
The seasonal weather-driven activity of the tick Ixodes ricinus is frequently explored using multisite surveys. This study aimed to investigate the statistical modeling of seasonal trends in the activity of I. ricinus nymphs when both the influence of abiotic factors and spatial heterogeneity were taken into account. Time series data of abiotic covariates (temperature, relative humidity, rainfall and photoperiod) and nymphal tick counts were recorded on several sites in The Netherlands, Belgium and in France in 2008 and 2009...
January 26, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28124749/ixodid-ticks-parasitizing-wild-carnivores-in-romania
#7
Gianluca D'Amico, Mirabela Oana Dumitrache, Ioana Adriana Matei, Angela Monica Ionică, Călin Mircea Gherman, Attila David Sándor, David Modrý, Andrei Daniel Mihalca
In Romania, data regarding hard-tick diversity and tick-host associations in wild carnivores are scarce. We aimed to identify tick species in wild carnivores and to establish reliable data on tick-host associations. The study was conducted in various Romanian localities from all five ecoregions found in the country. Fourteen species of wild carnivores were examined. Immature and adult ticks were collected and identified using the morphological keys. The frequency and mean intensity of tick infestation, overall and differentiated by species, developmental stage and host were calculated...
January 26, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28110429/in-vitro-effects-of-caffeic-acid-nortriptyline-precocene-i-and-quercetin-against-rhipicephalus-annulatus-acari-ixodidae
#8
Reghu Ravindran, Nayikottummal Devadas Chithra, Pattanur Edathil Deepa, Karapparambu Gopalan Ajithkumar, Leena Chandrasekhar, Kanapadinchareveetil Sreelekha, Suresh Narayanan Nair, Sanis Juliet, Srikanta Ghosh
In the present study, the acaricidal effects of caffeic acid, nortriptyline, precocene I and quercetin against Rhipicephalus annulatus (syn. Boophilus annulatus) Say (Acari: Ixodidae) were evaluated. Adult immersion technique (24 ticks immersed for 2 min in one dilution of the compound) was used for the assessment of the effects of caffeic acid (0.39-100 mg/mL), nortriptyline (0.625-50 mg/L), precocene I (0.004488-5 mg/mL) and quercetin (6.25-100 mg/mL) against R. annulatus. Adult tick mortality, reproductive index, inhibition of fecundity and hatching were calculated...
January 21, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28091959/genetic-variation-in-mitochondrial-genes-of-the-tick-haemaphysalis-flava-collected-from-wild-hedgehogs-in-china
#9
Zhong-Bo Li, Tian-Yin Cheng, Xing-Li Xu, Lu-Lin Song, Guo-Hua Liu
The tick Haemaphysalis flava (Acari: Ixodidae) is an important ectoparasite, which causes direct damage to their hosts and also acts as a vector of various infectious disease agents in China. Despite its significance, the epidemiology, genetics and biology of H. flava has not been studied in detail. In the present study, the genetic variation in three mitochondrial (mt) DNA regions, namely cytochrome c oxidase subunit 1 (cox1) and NADH dehydrogenase subunit 1 and 4 (nad1 and nad4), was examined in H. flava ticks collected from wild hedgehogs in China...
January 16, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28251409/tick-abundance-a-one-year-study-on-the-impact-of-flood-events-along-the-banks-of-the-river-danube-austria
#10
Martin Weiler, Georg Gerhard Duscher, Monika Wetscher, Julia Walochnik
The abundance of questing ticks depends on various factors. In this study, the impact of a major flood event on tick abundance and activity was observed. Ticks were collected on a weekly basis in two approximately 2 km(2) large floodplain areas on the inner and the outer bank of the river Danube north of Vienna, Austria. In 2013 before a 200 year flood event, an average of 55 ticks per hour was collected in the area on the outer bank and 21 ticks per hour in the area on the inner bank. After the flood event the tick activity was massively reduced, with 12 ticks per hour on the outer bank and 1...
February 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28091958/identification-and-anticoagulant-activity-of-a-novel-kunitz-type-protein-ha11-from-the-salivary-gland-of-the-tick-hyalomma-asiaticum
#11
Houshuang Zhang, Ruiqiong Qiao, Haiyan Gong, Jie Cao, Yongzhi Zhou, Jinlin Zhou
Kunitz/bovine pancreatic trypsin inhibitor proteins are abundant in the salivary glands of ticks and perform multiple functions in blood feeding, including inhibiting blood coagulation, regulating host blood supply and disrupting host angiogenesis. In this study, we identified a novel gene designated HA11 (Hyalomma asiaticum 11 kDa protein) from the salivary gland of the tick H. asiaticum. HA11 is encoded by a gene with an open reading frame of 306 bp that is translated into a deduced 101 amino acid 11 kDa protein that shares 27% sequence identity with a Kunitz-like protease inhibitor precursor in Amblyomma variegatum...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28064411/the-tick-acari-ixodidae-fauna-of-herald-s-beacon-islet-australia
#12
Mackenzie L Kwak, Kate Mintram
A rare opportunity to travel to Herald's Beacon Islet with permission from the Australian government to collect ticks allowed for a survey of the tick fauna of the island to be undertaken for the first time. The avian fauna of the island, which serve as hosts, was also recorded and includes one new species record for the island. The seabird soft tick Ornithodoros capensis Neumann and the seabird hard tick Amblyomma loculosum Neumann were found to be present on the island. Images of the ticks present on the island are presented along with morphological characters for their identification...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28040863/male-spider-mites-use-chemical-cues-but-not-the-female-mating-interval-to-choose-between-mates
#13
Leonor R Rodrigues, Alexandre R T Figueiredo, Susana A M Varela, Isabelle Olivieri, Sara Magalhães
The choice of the partner an individual will mate with is expected to strongly impact its fitness. Hence, natural selection has favoured the evolution of cues to distinguish among mates that will provide different fitness benefits to the individual that is choosing. In species with first-male sperm precedence, this is particularly important for males, as mating with mated females will result in no offspring. In the spider mite Tetranychus urticae only the first mating is effective, except if the interval between first and second copulations is shorter than 24 h...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27988819/egg-hatching-response-to-a-range-of-ultraviolet-b-uv-b-radiation-doses-for-four-predatory-mites-and-the-herbivorous-spider-mite-tetranychus-urticae
#14
Dimitrios S Koveos, Takeshi Suzuki, Anastasia Terzidou, Anastasia Kokkari, George Floros, Petros Damos, Nikos A Kouloussis
Egg hatchability of four predatory mites-Phytoseiulus persimilis Athias-Henriot, Iphiseius [Amblyseius] degenerans Berlese, Amblyseius swirskii Athias-Henriot, and Euseius finlandicus Oudemans (Acari: Phytoseiidae)-and the spider mite Tetranychus urticae Koch (Acari: Tetranychidae) was determined under various UV-B doses either in constant darkness (DD) or with simultaneous irradiation using white light. Under UV-B irradiation and DD or simultaneous irradiation with white light, the predator's eggs hatched in significantly lower percentages than in the control non-exposed eggs, which indicates deleterious effects of UV-B on embryonic development...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27943023/copulation-duration-sperm-transfer-and-reproduction-of-the-two-closely-related-phytoseiid-mites-neoseiulus-womersleyi-and-neoseiulus-longispinosus-acari-phytoseiidae
#15
Mohammad Shaef Ullah, Ryouhei Sugimoto, Manita Kongchuensin, Ploychompoo Konvipasruang, Tetsuo Gotoh
The effects of copulation duration on reproduction were studied in two important biological control agents, Neoseiulus womersleyi (Schicha) and Neoseiulus longispinosus (Evans), to better understand their reproductive potential. The number of eggs produced was significantly and positively related to the copulation duration in both species. Egg production was observed even in females which experienced only 15 min of copulation and increased as copulation period increased in both species. Both pre- and post-oviposition periods of N...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27873138/photo-enzymatic-repair-of-uvb-induced-dna-damage-in-the-two-spotted-spider-mite-tetranychus-urticae
#16
Yasumasa Murata, Masahiro Osakabe
Ambient ultraviolet-B (UVB) radiation induces lethal effects in the two-spotted spider mite Tetranychus urticae, whereas photoreactivation by irradiation with ultraviolet-A and visible light (VIS) plays an important role to increase survival of mites irradiated by UVB. The physiological mechanisms and ecological significance of photoreactivation in terrestrial arthropods have not been shown clearly. We verified the biological impact and accumulation of DNA lesions by UVB irradiation and the repair of them by photoreactivation in T...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27858185/a-facultative-ectoparasite-attains-higher-reproductive-success-as-a-parasite-than-its-free-living-conspecifics
#17
Lien T Luong, Dewmi Subasinghe
Comparative and phylogenetic studies reveal that parasites evolved from free-living ancestors, but the underlying processes and mechanisms are not well understood. In order for selection to favor the evolution of parasitism, there must be pre-existing adaptations for host exploitation and a fitness advantage favoring the transition to parasitism. Here, we experimentally investigate the differential reproductive success of a facultative parasite, Macrocheles subbadius. Lifetime reproductive success was higher among female mites that fed on fruit fly hemolymph as parasites compared to free-living mites...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27812828/bacteria-of-the-genera-ehrlichia-and-rickettsia-in-ticks-of-the-family-ixodidae-with-medical-importance-in-argentina
#18
Patrick S Sebastian, Evelina L Tarragona, María N Saracho Bottero, Atilio J Mangold, Ute Mackenstedt, Santiago Nava
The aim of this study was to get an overview about the occurrence of bacteria from the genus Ehrlichia and Rickettsia in ixodid ticks with medical importance in Argentina. Therefore, in 2013 and 2014, free-living ticks were collected in different provinces of northern Argentina. These ticks were determined as Amblyomma sculptum, Amblyomma neumanni, Amblyomma parvum, Amblyomma triste, Amblyomma ovale, Amblyomma tonelliae and Haemaphysalis juxtakochi. All samples were tested to determine the infection with Ehrlichia spp...
January 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27830375/erratum-to-highly-virulent-beauveria-bassiana-strains-against-the-two-spotted-spider-mite-tetranychus-urticae-show-no-pathogenicity-against-five-phytoseiid-mite-species
#19
Shengyong Wu, Haicui Xie, Maoye Li, Xuenong Xu, Zhongren Lei
No abstract text is available yet for this article.
December 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27822784/species-composition-distribution-ecological-preference-and-host-association-of-ticks-in-cyprus
#20
Andreas Tsatsaris, Dimosthenis Chochlakis, Byron Papadopoulos, Aikaterini Petsa, Leonidas Georgalis, Emmanouil Angelakis, Ioannis Ioannou, Yannis Tselentis, Anna Psaroulaki
Tick population and species depend on the effect of biotic and abiotic factors, especially vegetation, climate and host density; Cyprus, due to the mild climate, favors the appearance and spread of tick-borne infections. Our objective was to identify the tick species present in the island, to investigate their geographical distribution and their epidemiological implications. During a three-year study (2004-2006) we collected ticks from domestic and wild animals over the island of Cyprus. Data on temperature, humidity, altitude and vegetation, were also recorded...
December 2016: Experimental & Applied Acarology
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