seasonal distribution and relationship to temperature and precipitation of the most abundant species of culicoides in five provinces of andalusia, spain.a total of 177,344 culicoides specimens were collected from 3,109 light trap collections made weekly from august 1990 to october 1991 at 62 sites in the provinces of cádiz, córdoba, huelva, seville, and málaga, spain. reported for the 1st time are culicoides agathensis, culicoides bahrainensis, culicoides marcleti, and culicoides odiatus in the iberian peninsula, and culicoides scoticus in andalusia, spain. as a group, culicoides were active throughout the year. the 3 most common species were cu ...199910480132
spatial distribution of bluetongue virus and its culicoides vectors in sicily.during the recent mediterranean epizootic of bluetongue, an extensive programme of serological and vector (culicoides biting midges (diptera: ceratopogonidae)) surveillance was carried out across sicily. this paper presents the analysis of 911 light trap catches collected at the times of peak culicoides abundance (summer to autumn 2000-2002) in 269 sites, in order to produce detailed maps of the spatial distribution of the main european vector, culicoides imicola kieffer and that of potential no ...200415189232
modelling the distributions of culicoides bluetongue virus vectors in sicily in relation to satellite-derived climate variables.surveillance data from 268 sites in sicily are used to develop climatic models for prediction of the distribution of the main european bluetongue virus (btv) vector culicoides imicola kieffer (diptera: ceratopogonidae) and of potential novel vectors, culicoides pulicaris linnaeus, culicoides obsoletus group meigen and culicoides newsteadi austen. the models containing the 'best' climatic predictors of distribution for each species, were selected from combinations of 40 temporally fourier-process ...200415189233
identification of cryptic species of culicoides (diptera: ceratopogonidae) in the subgenus culicoides and development of species-specific pcr assays based on barcode regions.culicoides biting midges (diptera: ceratopogonidae) are vectors of important diseases affecting wild and domestic animals. during the last decade they have played a major role in the epidemiology of the largest bluetongue epizootic ever recorded in europe, the disease is transmitted between hosts almost exclusively by bites of culicoides midges and affects both domestic and wild ruminants however severe disease usually occurs in certain breeds of sheep and some species of deer. an accurate vecto ...200919682796
larval habitats and seasonal abundance of culicoides biting midges found in association with sheep in northern sardinia, italy.between january 2005 and december 2006, the larval habitats and seasonal abundances of 21 species of culicoides (diptera: ceratopogonidae) found in association with livestock on a farm in northern sardinia were studied. culicoides were collected using two light traps (one placed in a sheep shed and the other near water ponds) and reared from mud collected in and along the margins of a small and a large water pond. the mammalophilic culicoides imicola kieffer and culicoides newsteadi austen were ...201020604864
culicoides species communities associated with wild ruminant ecosystems in spain: tracking the way to determine potential bridge vectors for arboviruses.the genus culicoides latreille 1809 is a well-known vector for protozoa, filarial worms and, above all, numerous viruses. the bluetongue virus (btv) and the recently emerged schmallenberg virus (sbv) are responsible for important infectious, non-contagious, insect-borne viral diseases found in domestic ruminants and transmitted by culicoides spp. both of these diseases have been detected in wild ruminants, but their role as reservoirs during the vector-free season still remains relatively unknow ...201526510136
a preliminary study on the insect fauna of al-baha province, saudi arabia, with descriptions of two new species.a preliminary study was carried out on the insect fauna of al-baha province, south-western part of saudi arabia. a total number of 582 species and subspecies (few identified only to the genus level) belonging to 129 families and representing 17 orders were recorded. two of these species are described as new, namely: monomorium sarawatensis sharaf & aldawood, sp. n. [formicidae, hymenoptera] and anthrax alruqibi el-hawagry sp. n. [bombyliidae, diptera]. another eight species are recorded for the ...201323794807
hyaluronidase activity in saliva of european culicoides (diptera: ceratopogonidae).biting midges of the genus culicoides transmit pathogens of veterinary importance such as bluetongue virus (reoviridae: orbivirus). the saliva of culicoides is known to contain bioactive molecules including peptides and proteins with vasodilatory and immunomodulative properties. in this study, we detected activity of enzyme hyaluronidase in six culicoides species that commonly occur in europe and that are putative vectors of arboviruses. hyaluronidase was present in all species studied, although ...201526487248
towards the pcr-based identification of palaearctic culicoides biting midges (diptera: ceratopogonidae): results from an international ring trial targeting four species of the subgenus avaritia.biting midges of the genus culicoides (diptera: ceratopogonidae) are biological vectors of internationally important arboviruses. to understand the role of culicoides in the transmission of these viruses, it is essential to correctly identify the species involved. within the western palaearctic region, the main suspected vector species, c. obsoletus, c. scoticus, c. dewulfi and c. chiopterus, have similar wing patterns, which makes it difficult to separate and identify them correctly.201424884950
role of different culicoides vectors (diptera: ceratopogonidae) in bluetongue virus transmission and overwintering in sardinia (italy).bluetongue (bt) epidemics have affected the mediterranean island of sardinia since 2000. while culicoides imicola represents the main bluetongue virus (btv) vector, other european culicoides biting midges, possibly implicated in virus transmission, have been detected here. understanding their distribution, seasonal abundance, and infection rates is necessary to predict disease incidence and spread across coastal and inland areas, and to define their role in virus overwintering.201627502924
first report of 13 species of culicoides (diptera: ceratopogonidae) in mainland portugal and azores by morphological and molecular characterization.the genus culicoides (diptera: ceratopogonidae) contains important vectors of animal and human diseases, including bluetongue, african horse sickness and filariosis. a major outbreak of bluetongue occurred in mainland portugal in 2004, forty eight years after the last recorded case. a national entomological surveillance plan was initiated in mainland portugal, azores and the madeira archipelagos in 2005 in order to better understand the disease and facilitate policy decisions. during the survey, ...201222536340
barcoding of biting midges in the genus culicoides: a tool for species determination.biting midges of the genus culicoides (diptera: ceratopogonidae) are insect vectors of economically important veterinary diseases such as african horse sickness virus and bluetongue virus. however, the identification of culicoides based on morphological features is difficult. the sequencing of mitochondrial cytochrome oxidase subunit i (coi), referred to as dna barcoding, has been proposed as a tool for rapid identification to species. hence, a study was undertaken to establish dna barcodes for ...201323106166
vector species of culicoides midges implicated in the 2012‑2014 bluetongue epidemics in 2012, serotypes 1 and 4 of bluetongue virus (btv) entered and co‑circulated in sardinia. the following year, btv‑1 spread all over sardinia and invaded sicily and the italian tyrrenian coast. in 2014, this strain spread extensively in mainland italy, causing severe outbreaks. in late 2014, btv‑4 was detected in southern italy (apulia region). this study reports the detection of btv in species of culicoides (diptera: ceratopogonidae) collected in italy during the epidemics between 2012 and 201 ...201526129664
the geographical distribution and first molecular analysis of culicoides latreille (diptera: ceratopogonidae) species in the southern and southeastern turkey during the 2012 outbreak of bovine ephemeral fever.this study investigated the geographical distribution and molecular analysis of culicoides species in the southern and southeastern turkey during the 2012 outbreak of bovine ephemeral fever (bef). the midge specimens caught by onderstepoort-type light traps from livestock farms were tested for molecular evidence of existence of viral genome. blood specimens were collected from clinically bef-suspected acute febrile cattle. total nucleic acid samples obtained from field specimens were checked aga ...201425199552
biting midges monitoring (diptera: ceratopogonidae: culicoides latreille) in the governate of monastir (tunisia): species composition and molecular investigations.the results of entomological studies carried out in the governate of monastir (tunisia) in 2009-2010 (captures and emergences from muds) focusing on culicoides species are presented in the present study. identification of culicoides at the species level is based on morphological characters, and a molecular study has been carried out based on mitochondrial dna cytochrome c oxidase i gene (coi) and d1 and d2 domains of the 28s rdna. the dna sequences reported here are related to 10 species (on 25 ...201424825311
description of culicoides paradoxalis sp. nov. from france and portugal (diptera: ceratopogonidae).a new species, culicoides paradoxalis ramilo and delécolle (diptera: ceratopogonidae), is described from specimens collected in france (corsica and southeast region) and portugal. this species resembles culicoides lupicaris downes and kettle, and can be distinguished from this species and from culicoides newsteadi austen by its wing pattern, in addition to the absence of spines on the tarsomere 4 of female mid leg. in male, the presence of two appendices on the sternite 9 together with the absen ...201325113346
schmallenberg virus in culicoides latreille (diptera: ceratopogonidae) populations in france during 2011-2012 outbreak.following the emergence of the schmallenberg virus (sbv) in 2011 in germany and its rapid spread in europe, culicoides (diptera: ceratopogonidae) collected through the french surveillance network were analysed in order to record the presence of virus genome into species diversity collected, to assess the minimum infectious rates (mir) and the virus circulation dynamics in culicoides populations. two vector activity periods were selected (2011, august to october, 53 sites and 2012, june to octobe ...201728815930
torix group rickettsia are widespread in culicoides biting midges (diptera: ceratopogonidae), reach high frequency and carry unique genomic features.there is increasing interest in the heritable bacteria of invertebrate vectors of disease as they present novel targets for control initiatives. previous studies on biting midges (culicoides spp.), known to transmit several rna viruses of veterinary importance, have revealed infections with the endosymbiotic bacteria, wolbachia and cardinium. however, rickettsial symbionts in these vectors are underexplored. here, we present the genome of a previously uncharacterized rickettsia endosymbiont from ...201728805302
Displaying items 1 - 18 of 18