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Experimental & Applied Acarology

Vincent Cicculli, Xavier de Lamballerie, Remi Charrel, Alessandra Falchi
Here we report the first detection of Amblyomma variegatum, a tick species of medical and veterinary importance, and the first molecular evidence of a pathogen, Rickettsia africae, both new to Corsica (France). In August 2018, an ixodid tick with an unusual morphology was removed from the ventral part of a cow's whole skin in a slaughterhouse located in the village of Ponte-Leccia (Haute-Corse). The tick was morphologically identified as an adult male of A. variegatum. This result was confirmed by 16S rDNA sequence analysis with a close relative being a sequence from Senegal showing 99% nucleotide identity...
January 17, 2019: Experimental & Applied Acarology
Wurelihazi Hazihan, Zhihui Dong, Liping Guo, Kadyken Rizabek, Dzhunysov Askar, Kulmanova Gulzhan, Mahanov Kudaibergen, Akishev Nurlan Kenjebaevich, Tolegen Talgat, Kenesbay Kairullayev, Yuanzhi Wang
A total of 178 adult ticks were collected from 32 pet dogs from five veterinary clinics in Shihezi City, Xinjiang Uygur Autonomous Region (XUAR), northwestern China. All the ticks were identified by comprehensive morphological and genetic analyses, and rickettsiae were detected by seven Rickettsia-specific genetic markers in the ticks. The ticks collected were identified as Rhipicephalus sanguineus sensu lato. Twenty-one of the 178 samples (11.8%) were positive for rickettsiae. Among these, in 13 (61.9%) samples Candidatus R...
January 16, 2019: Experimental & Applied Acarology
Tanya Josek, Allison M Gardner, Tyler J Hedlund, Allison T Parker, Erin Allmann Updyke, Brian F Allan
Ticks use a variety of chemical cues to locate hosts, the main cue being carbon dioxide, which is exhaled by hosts. This study sought to experimentally determine whether ticks exhibit preference among human hosts based on host sex, as the chemical components of human male and female breath have been shown to differ. We focused on the lone star tick, Amblyomma americanum, due to its importance as a disease vector in the United States and its active host-seeking behavior. To test the hypothesis that ticks exhibit preference based upon host sex, we conducted a binary choice behavioral bioassay...
January 10, 2019: Experimental & Applied Acarology
M A Minor, S G Ermilov, D А Philippov
We investigated oribatid mite communities in a Sphagnum-dominated boreal peatland system characterised by a mosaic of oligotrophic and meso-eutrophic areas. We aimed to determine the relative importance of environmental factors (pH, Sphagnum nutrient content, water table level, diversity of vascular plants and bryophytes in the surrounding plant community) and spatial variation in influencing abundance, diversity and community composition of aquatic and terrestrial oribatid mites. Among environmental variables, water table level (micro-topography), pH, and K in Sphagnum tissues were the main predictors of Oribatida community structure...
January 2, 2019: Experimental & Applied Acarology
Hebatallah Galal Abouelmaaty, Mimoe Fukushi, Ayatallah Galal Abouelmaaty, Noureldin Abuelfadl Ghazy, Takeshi Suzuki
The two-spotted spider mite (TSSM), Tetranychus urticae, is a chelicerate herbivore with a wide host range and strong ability to develop pesticide resistance. Experimental TSSM populations are easy to maintain, and the recent publication of the complete TSSM genome sequence and development of RNA interference-based reverse genetics protocols make this species an ideal chelicerate model for the study of pesticide resistance and plant-herbivore interactions. In such studies, treated leaf discs are often used for oral delivery of test compounds...
January 2, 2019: Experimental & Applied Acarology
Xiaohuan Jiang, Jiale Lv, Endong Wang, Xuenong Xu
In phytoseiid mites, the spermatophore is an intermediate, isolated structure where sperms are stored during mating. In the present study, the producing process of Phytoseiulus persimilis spermatophore is described in details. Its shape, and the number and shape of sperms inside, are also analyzed, each as affected by coupling time. Based on our results, the spermatophore of P. persimilis is pyriform, and is produced from the male genital opening within 3 min since mating started. When produced, the spermatophore is transferred along the capitular groove to the cheliceral base, where it is adhered to one of the two small holes at the bases of the chelicerae...
December 19, 2018: Experimental & Applied Acarology
Satoshi Kakoki, Takeshi Kamimuro, Yuki Ikenoue, Mahomi Inokuchi, Katsuo Tsuda, Yositaka Sakamaki
The Kanzawa spider mite, Tetranychus kanzawai Kishida, is a major pest in tea fields [Camellia sinensis (L.) O. Kuntze] in Japan. However, recently, there have been some instances where acaricides are no longer applied as a result of the low occurrence of T. kanzawai in tea fields in Japan. In the period of 2015-2017, surveys of predatory mites in the study tea field detected Amblyseius eharai Amitai and Swirski, Phytoseiulus persimilis Athias-Henriot, Euseius sojaensis (Ehara), Amblyseius obtuserellus Wainstein and Begljarov, and Typhlodromus vulgaris Ehara in tea fields, but not Neoseiulus womersleyi (Schicha), indicating that a major change in the composition of the phytoseiid mite population had occurred...
December 19, 2018: Experimental & Applied Acarology
Weiqing Zheng, Xuenan Xuan, Renlong Fu, Huiying Tao, Rongman Xu, Yangqing Liu, Xiaoqing Liu, Jiafu Jiang, Haixia Wu, Hongmei Ma, Yi Sun, Haiying Chen
In recent years, a large effort has been made for tick surveys for public health importance around China, especially after outbreaks of severe fever with thrombocytopenia syndrome (SFTS) occurred in humans in 2009. In this paper, the preliminary species composition and population distribution of ticks in Jiangxi Province of Eastern China is reported. Ticks were collected in three habitats (grassland, shrubs and woodland) and from nine host groups in 12 sampling sites throughout Jiangxi Province between 2011 and 2018...
December 12, 2018: Experimental & Applied Acarology
Huang Zhendong, Yu Guangfu, Zhang Zhong, Zhang Ruiling
Haemaphysalis longicornis (Acari: Ixodidae) is an important vector tick that is widely distributed around the world. In many regions, this tick acts as vector of a wide range of pathogens to humans and animals, and its control is mainly based on the use of chemical pesticides. However, the occurrence of some adverse effects, such as tick resistance to pesticides and food and environmental contamination, are driving the need to develop more effective and environmentally sound approaches to control and prevent ticks...
November 28, 2018: Experimental & Applied Acarology
Li-Lian Chao, Chin-Kuei Hsieh, Tsung-Yu Ho, Chien-Ming Shih
Hard ticks infesting canine hosts were determined for the first time in northern Taiwan. Between May 2010 and April 2011, a total of 9467 ticks were collected from 2025 dogs. They were identified based on pictorial keys of their morphological characteristics. These ticks belong to three genus and six species: Rhipicephalus sanguineus, R. haemaphysaloides, Haemaphysalis hystricis, H. lagrangei, H. formosensis and Ixodes ovatus. Rhipicephalus sanguineus was the most dominant species (92.5%), followed by H. hystricis (4...
November 28, 2018: Experimental & Applied Acarology
Josh Douglas, Paul Umina, Sarina Macfadyen, Ary Hoffmann
Halotydeus destructor and Penthaleus major are species of earth mite commonly found at high densities in agricultural fields in Australia and other parts of the world. These mites pose a risk to a range of winter crops and pastures when seedlings emerge in autumn. In order to predict likely mite pressure, we investigated whether autumn densities in pastures can be determined from agronomic and environmental field variables. For H. destructor, field densities showed little association with a range of vegetation variables but could largely be explained using the variable field type, with high densities present when fields had mixtures of grass, clover and weeds...
November 28, 2018: Experimental & Applied Acarology
Rodrigo Giglioti, César Cristiano Bassetto, Cintia Hiromi Okino, Henrique Nunes de Oliveira, Márcia Cristina de Sena Oliveira
Parasitemia generated by Anaplasma marginale causes significant losses in the cattle industry. A major constraint to the effective control and management of anaplasmosis in livestock is the lack of a rapid and reliable diagnostic test to identify the parasite and allow for immediate therapy. In the present study, we developed a novel DNA-based assay for the detection of A. marginale in bovine blood samples, using loop-mediated isothermal amplification (LAMP). DNA from six cattle and hemoparasite samples (Babesia bovis, Babesia bigemina, Anaplasma centrale and A...
November 26, 2018: Experimental & Applied Acarology
S Muñoz-Leal, E Barbier, F A M Soares, E Bernard, M B Labruna, F Dantas-Torres
In Brazil, at least 14 species of soft ticks (Argasidae) are associated with bats. While Ornithodoros hasei seems to be abundant among foliage-roosting bats, other groups of ticks are found exclusively inside caves. In this paper, noteworthy records of soft ticks infesting bats are documented in new localities from Bahia, Pernambuco, Piauí, and Rondônia states. Out of 201 bats examined, 25 were infested by 152 ticks belonging to seven taxa: Ornithodoros cavernicolous, O. hasei, Ornithodoros marinkellei, Ornithodoros cf...
November 24, 2018: Experimental & Applied Acarology
Neda Rostami, Mostafa Maroufpoor, Amin Sadeghi, Mostafa Mansour Ghazi, Remzi Atlıhan
The strawberry mite, Phytonemus pallidus fragariae (Banks) (Acari: Tarsonemidae), is one of the most important pests of greenhouse grown strawberry plants. Field grown strawberries may also be infested by the pest in high humid conditions. Life tables give the most comprehensive description of the development, survival, stage differentiation, reproduction and consequently population growth of a population, and thus it is an important base of population ecology and pest management. In this study, to provide a comprehensive evaluation of an ecology-based and cost-effective control program, life history and demographic parameters of the strawberry mite were studied...
November 22, 2018: Experimental & Applied Acarology
Maerle O Maia, Valdinei C Koppe, Sebastián Muñoz-Leal, Thiago F Martins, Arlei Marcili, Marcelo B Labruna, Richard Campos Pacheco
We report tick infestations and rickettsial detection in ticks infesting free-living wild mammals (Monodelphis domestica, Tolypeutes tricinctus, Thrichomys inermis and Kerodon rupestris) captured in the Caatinga ecoregion of Bahia state, northeastern Brazil, during September to December 2016. Overall, 117 ticks (61 larvae, 25 nymphs, 25 males, 6 females) belonging to two genera, and at least three species were collected: Amblyomma auricularium, Amblyomma parvum, Amblyomma sp., Ornithodoros rietcorreai and an unidentified Ornithodoros sp...
November 15, 2018: Experimental & Applied Acarology
Naila A Che Kamaruzaman, Peter Mašán, Yelitza Velásquez, Alejandro González-Medina, Anders Lindström, Henk R Braig, M Alejandra Perotti
The biology of macrochelid mites might offer new venues for the interpretation of the environmental conditions surrounding human death and decomposition. Three human corpses, one from Sweden and two from Spain, have been analysed for the occurrence of Macrochelidae species. Macrocheles muscaedomesticae (Scopoli) females were associated with a corpse that was found in a popular beach area of southeast Spain. Their arrival coincides with the occurrence of one of their major carrier species, the filth fly Fannia scalaris, the activity of which peaks during mid-summer...
November 15, 2018: Experimental & Applied Acarology
Marcos Valerio Garcia, Vinicius da Silva Rodrigues, Antônio Carlos Monteiro, Lucas Detogni Simi, Leandro de Oliveira Souza Higa, Maria Marlene Martins, Nancy Prette, Dinalva Alves Mochi, Renato Andreotti, Matias Pablo Juan Szabó
Amblyomma parvum Aragão (Acari: Ixodidae) is a tick species found with wide distribution in the Neotropical region. Even though it is a wildlife-related tick, it is also a frequent parasite of domestic animals, is aggressive to human beings and may harbor pathogenic microorganisms. Therefore, it is a target species for control on domestic animals, particularly those at the rural-wildlife interface. Herein, the efficacy of two isolates (E9 and IBCB 425) of an entomopathogenic fungus, Metarhizium anisopliae sensu lato, already evaluated for ticks that parasitize domestic animals, was tested against unfed A...
November 12, 2018: Experimental & Applied Acarology
Tom P G Van den Beuken, Isabel M Smallegange
Intralocus sexual conflict (IASC) arises when males and females have different trait optima. Some males pursue different alternative reproductive tactics (ARTs) with different trait optima, resulting in different strengths of IASC. Consequently, for instance daughter fitness is differentially affected by her sire's morph. We tested if-and which-other life-history traits correlatively change in bidirectional, artificial selection experiments for ARTs. We used the male-dimorphic bulb mite Rhizoglyphus robini, the males of which are high-fitness 'fighters' or low-fitness 'scramblers'...
November 12, 2018: Experimental & Applied Acarology
Tuo Li, Ming Liu, Tian-Tian Zhang, Yuan Li, Wen-Ying Wang, Meng-Meng Li, Zhi-Jun Yu, Jing-Ze Liu
The tick Dermacentor everestianus mainly distributed in Tibet, China and Nepal, and can transmit some pathogens causing great damages in Qinghai-Tibet Plateau. This study investigated the life cycle and development characteristics of D. everestianus under field conditions. The average duration of the whole life cycle of D. everestianus was 124.4 days, with the host available in the field plot. Under natural conditions, the mean feeding, preoviposition and oviposition period of female ticks were 6.1, 17.9 and 21...
November 9, 2018: Experimental & Applied Acarology
J E Song, H S Lee
Acaricidal activities of the active component isolated from Melissa officinalis oil and its structural analogues against Tyrophagus putrescentiae were evaluated using fumigant and contact bioassays. The structure of 3,7-dimethyl-2,6-octadienal purified from M. officinalis oil was elucidated with EI-MS, 1 H- and 13 C-NMR, 1 H-1 H COSY, and DEPT-NMR. Based on the LD50 values of 3,7-dimethyl-2,6-octadienal analogues in fumigant and contact bioassays, respectively, 2,4-octadienal showed the highest activity (LD50  = 2...
November 2018: Experimental & Applied Acarology
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