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Gábor Horváth, Tamás Szörényi, Ádám Pereszlényi, Balázs Gerics, Ramón Hegedüs, András Barta, Susanne Åkesson
Horseflies (Tabanidae) are polarotactic, being attracted to linearly polarized light when searching for water or host animals. Although it is well known that horseflies prefer sunlit dark and strongly polarizing hosts, the reason for this preference is unknown. According to our hypothesis, horseflies use their polarization sensitivity to look for targets with higher degrees of polarization in their optical environment, which as a result facilitates detection of sunlit dark host animals. In this work, we tested this hypothesis...
November 2017: Royal Society Open Science
Stefano Veraldi, Luigi Esposito
We report seven Caucasian adult patients who were bitten by horseflies (Tabanus bovinus Linnaeus, 1758) during a trip to Bolivia. Clinical picture was superimposable in all patients: it was characterized by multiple, erythematous, roundish, flattened, large plaques, often with a central point corresponding to horsefly bite, surrounded by satellite, similar, although smaller, lesions. All lesions were located on the neck and/or the upper chest and/or the shoulders; one patient had lesions also on the face. All patients complained of pain at the site of the bite...
September 1, 2017: Journal of Travel Medicine
Perla Calderón H, Camilo Rojas E, Werner Apt B, Douglas Castillo O
Myiasis is an infestation of tissues and organs of humans and animals by Diptera larvae (flies, horseflies, mosquitoes). They are located at different body sites, and classified clinically as cutaneous, visceral and cavitary. We report a 26-year-old woman with a history of seborrheic dermatitis and recent trip to Brazil. She presented with a seven days history of suppurating wounds in the parieto-occipital area of the scalp. At physical examination we found three ulcers of approximately 1.5 cm each, with multiple mobile larvae inside...
February 2017: Revista Médica de Chile
Rabih Darwiche, Laurent Mène-Saffrané, David Gfeller, Oluwatoyin A Asojo, Roger Schneiter
Members of the CAP superfamily (<u>c</u>ysteine-rich secretory proteins,<u>a</u>ntigen 5, and<u>p</u>athogenesis-related 1 proteins), also known as SCP superfamily (<u>s</u>perm-<u>c</u>oating<u>p</u>roteins), have been implicated in many physiological processes, including immune defenses, venom toxicity, and sperm maturation. Their mode of action, however, remains poorly understood. Three proteins of the CAP superfamily, Pry1, -2, and -3 (<u>p</u>athogen<u>r</u>elated in<u>y</u>east), are encoded in the Saccharomyces cerevisiae genome...
May 19, 2017: Journal of Biological Chemistry
A L Henriques, D D D Carmo
The monotypic genus Teskeyellus was described for T. hirsuticornis Philip & Fairchild 1974, from Mexico. After more than 40 years, another species is described in the genus, T. cyanommatus sp. nov., based on two females and one male specimens from Amazon basin. The type specimens of T. hirsuticornis were studied and we concluded that there are enough similarities to include the new species in Teskeyellus.
August 2017: Neotropical Entomology
Wei-Yi Shen, Wen-Sui Lo, Yi-Ching Lai, Chih-Horng Kuo
Spiroplasma helicoides TABS-2(T) (DSM 22551) was isolated from the gut of a horsefly (Tabanus abactor) collected near Ardmore, Oklahoma, USA, in 1987. Here, we report the complete genome sequence of this bacterium to facilitate the investigation of its biology and the comparative genomics among Spiroplasma species.
October 20, 2016: Genome Announcements
Xun Sheng, Li Gao, Xiancui Lu, Yunfei Wang, Yalan Han, Ping Meng, Wenlin Chen, Qiumin Lu
Enzymes from various natural resources are valuable in management of thrombosis. Blood-sucking arthropods are one of these resources because they have a wide array of anti-hemostasis molecules in their salivary gland. However, it is difficult to purify enough protein samples from the salivary glands for pharmacological studies. In this work, a fibrinogenolytic enzyme (tablysin 2) identified from salivary glands of the horsefly Tabanus yao was expressed in Escherichia coli to further study its biological activities...
January 2017: Protein Expression and Purification
C R González, L Llanos, M Saldarriaga-Córdoba
The terrestrial larva of the austral horsefly, Parosca latipalpis (Macquart), identified by molecular techniques, is described. The larva of P. latipalpis resembles Scaptia auriflua (Donovan), Copidapha vicina (Taylor), Myioscaptia muscula (English), and Osca lata (Guérin-Meneville) in many morphological characters, as well as in their terrestrial habitats. Some characters that are shared between these species are unique among Tabanidae and provide evidence of their monophyletic origin, suggesting a typical Gondwanaland group...
October 2016: Neotropical Entomology
Ewa Cisak, Angelina Wójcik-Fatla, Violetta Zając, Anna Sawczyn, Jacek Sroka, Jacek Dutkiewicz
Spiroplasma is a genus of wall-less, low-GC, small Gram-positive bacteria of the internal contractile cytoskeleton, with helical morphology and motility. The genus is classified within the class Mollicutes. Spiroplasma / host interactions can be classified as commensal, pathogenic or mutualist. The majority of spiroplasmas are found to be commensals of insects, arachnids, crustaceans or plants, whereas a small number of species are pathogens of plants, insects, and crustaceans. Insects are particularly rich sources of spiroplasmas...
2015: Annals of Agricultural and Environmental Medicine: AAEM
F Rodhain
Among the many complex relationships between insects and microorganisms such as viruses, bacteria and parasites, some have resulted in the establishment of biological systems within which the insects act as a biological vector for infectious agents. It is therefore advisable to understand the identity and biology of these vectors in depth, in order to define procedures for epidemiological surveillance and anti-vector control. The following are successively reviewed in this article: Anoplura (lice), Siphonaptera (fleas), Heteroptera (bugs: Cimicidae, Triatoma, Belostomatidae), Psychodidae (sandflies), Simuliidae (black flies), Ceratopogonidae (biting midges), Culicidae (mosquitoes), Tabanidae (horseflies) and Muscidae (tsetse flies, stable flies and pupipara)...
April 2015: Revue Scientifique et Technique
Wen-Sui Lo, Yi-Ching Lai, Yun-Wei Lien, Tzu-Haw Wang, Chih-Horng Kuo
Spiroplasma litorale TN-1(T) (DSM 21781) was isolated from the gut of a green-eyed horsefly (Tabanus nigrovittatus), collected at Ocracoke Island in North Carolina in 1983. Here, we report the complete genome sequence of this bacterium to facilitate the investigation of its biology.
2015: Genome Announcements
Tamás Herczeg, Dénes Száz, Miklós Blahó, András Barta, Mónika Gyurkovszky, Róbert Farkas, Gábor Horváth
Although the tabanid species and populations occurring in eastern central Europe (Carpathian Basin) are thoroughly studied, there are only sporadic data about the influence of weather conditions on the abundance and activity of horseflies. To fill in this lack, in Hungary, we performed a 3-month summer survey of horsefly catches registering the weather parameters. Using common canopy traps and polarization liquid traps, we found the following: (i) rainfall, air temperature, and sunshine were the three most important factors influencing the trapping number of tabanids...
March 2015: Parasitology Research
Zhiye Zhang, Lan Gao, Chuanbin Shen, Mingqiang Rong, Xiuwen Yan, Ren Lai
Vasotab TY is a KGD (Lys-Gly-Asp)-containing peptide identified from salivary glands of the horsefly of Tabanus yao. We have previously reported that vasotab TY showed a strong vasodilator activity. In the present study, vasotab TY was found to inhibit platelet aggregation effectively. It completely inhibited platelet aggregation induced by adenosine diphosphate (ADP) at the concentration of 9.6μg/ml. Vasotab TY significantly reduced thrombus weight in rat arteriovenous shunt model and inhibited thrombosis in carrageenan-induced mouse tail thrombosis model in vivo...
September 2014: International Journal of Biochemistry & Cell Biology
N Pemola Devi, R K Jauhari
Haematophagous dipterans belonging to 10 genera - Aedes (12), Anopheles (14), Armigeres (01), Culex (09), Toxorhynchites (01), Uranotaenia (01), Sergentomyia (02), Phlebotomus (01), Atylotus (01) and Tabanus (03) were encountered from 12 localities under 6 blocks of Dehradun district (Uttarakhand) during January 2011 to December 2012. The Culicines (50.69%) were more dominant than the Anophelines (38.9%), Toxorhynchites (1.72%), horse flies (6.63%) and sandflies (2.01%). The following species viz., Toxorhynchites splendens and Phlebotomus argentipes have been recorded for the first time while Aedes pseudotaeniatus as reappeared species from the study area...
December 2013: Tropical Biomedicine
S G Medvedev
The paper gives a historical account of investigations of mosquitoes, black flies and horseflies carried out by the staff of the Laboratory of Parasitology, Zoological Institute RAS, supervised by a corresponding member of the Russian Academy of Sciences, Prof Yu. S. Balashov, during 1979-1994. The research team of the laboratory explored the local fauna, relative abundance, seasonal dynamics, diurnal activity, longevity of a mass flight activity, annual fluctuations of the number, and age content of populations of various mosquito, black fly and horsefly species in the territory of Leningrad, Novgorod and Pskov Provinces...
June 2013: Parazitologiia
Guo-Xiang Mo, Si-Ming Wang
As important traditional Chinese medicine materials, medicinal animals have been highly appreciated due to their strong bioactivities. Among these, medicinal insects have been thought to be significant, especially in preventing and treating modern diseases and tumors. Some of the most famous medicinal insects, such as horseflies, blister beetles and American cockroaches (Periplaneta americana) have been well known due to their reported effects in anti-thrombosis and fighting cancer. In general, identifying the medicinal functions and active components of medicinal insects has been a gradual processes...
December 2013: Dong Wu Xue Yan Jiu, Zoological Research
F Baldacchino, S Manon, L Puech, B Buatois, L Dormont, P Jay-Robert
Electrophysiological and behavioural responses of females of two tabanid species, Tabanus bromius L. and Atylotus quadrifarius (Loew) (Diptera: Tabanidae), to ammonia, octenol (1-octen-3-ol), phenols and aged horse urine were compared. Electroantennogram (EAG) responses in both species to octenol, 4-methylphenol (4MP), 3-propylphenol (3PP) and a phenol mixture (4MP and 3PP at a ratio of 16 : 1) increased in a dose-dependent fashion. The most effective stimulus was 4MP and synergism between the two phenols may exist...
June 2014: Medical and Veterinary Entomology
Miklós Blahó, Adám Egri, Dénes Száz, György Kriska, Susanne Akesson, Gábor Horváth
As with mosquitoes, female tabanid flies search for mammalian hosts by visual and olfactory cues, because they require a blood meal before being able to produce and lay eggs. Polarotactic tabanid flies find striped or spotted patterns with intensity and/or polarisation modulation visually less attractive than homogeneous white, brown or black targets. Thus, this reduced optical attractiveness to tabanids can be one of the functions of striped or spotty coat patterns in ungulates. Ungulates emit CO2 via their breath, while ammonia originates from their decaying urine...
July 2, 2013: Physiology & Behavior
F Baldacchino, A Porciani, C Bernard, P Jay-Robert
In high-altitude summer pastures, horseflies (Diptera: Tabanidae) can be a serious nuisance to livestock, as well as mechanical vectors of animal diseases such as besnoitiosis, an enzootic disease in the Pyrenees. However, the activity of horseflies in mountainous environments is poorly documented. To study the seasonality and distribution of tabanids in the Pyrenees Mountains, a sampling design was set up in two valleys on opposite sides of the mountain, one north-facing and one south-facing, along high-elevation gradients and at different distances from a water body between May and October 2011...
February 2014: Bulletin of Entomological Research
Ádám Egri, Miklós Blahó, Dénes Száz, András Barta, György Kriska, Györgyi Antoni, Gábor Horváth
Trapping flies with sticky paper sheets is an ancient method. The classic flypaper has four typical characteristics: (i) its sticky paper is bright (chamois, light yellow or white), (ii) it is strip-shaped, (iii) it hangs vertically, and (iv) it is positioned high (several metres) above ground level. Such flypapers, however, do not trap horseflies (tabanids). There is a great need to kill horseflies with efficient traps because they are vectors of dangerous diseases, and due to their continuous annoyance livestock cannot graze, horses cannot be ridden, and meat and milk production from cattle is drastically reduced...
June 2013: International Journal for Parasitology
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