| vectors of bluetongue virus in australia. | two of the 5 serotypes of bluetongue virus (btv) known from australia have been isolated from field collected insects. serotype 20 was isolated in 1975 from a mixed pool of 214 insects containing several culicoides species. serotype 1 has been isolated from c. (avaritia) fulvus sen & das gupta collected at beatrice hill in the northern territory and from c. (avaritia) brevitarsis kieffer collected at peachester in southeast queensland. all other isolates of bluetongue (bt) group viruses have bee ... | 1985 | 2989850 |
| phylogenetic characterisation of bluetongue viruses from naturally-infected insects, cattle and sheep in australia. | the polymerase chain reaction was used to detect the presence of bluetongue virus (btv) in a number of clinical and insect samples collected in the northern territory of australia. sequence analyses of the amplified btv genes differentiated endemic australian and exotic viruses. two potential exotic btv were detected as a result of pcr analyses of blood from sentinel animals and of the insect vector, culicoides wadai. the detection of btv in c wadai was the first direct demonstration of the pres ... | 1994 | 8048903 |
| models for the dispersal in australia of the arbovirus vector, culicoides brevitarsis kieffer (diptera: ceratopogonidae). | culicoides brevitarsis is the main biting midge responsible for the transmission of bluetongue and akabane viruses to livestock in australia. models are given for its dispersal after winter from endemic areas at the southern limit of its distribution in new south wales (nsw); the models might also be applicable elsewhere. model 1 shows that dispersal can be explained by distance from a key point just outside the endemic area in mid-northern/northern coastal nsw. the model provides probability da ... | 2000 | 11087955 |
| association between risk of seroconversion of sentinel cattle to bluetongue viruses and culicoides species (diptera: ceratopogonidae) in queensland, australia. | the association between risk of seroconversion of sentinel cattle to bluetongue viruses and the number of culicoides brevitarsis kieffer and c. wadai kitaoka caught by light traps was investigated using survival analysis. eight sentinel herds that seroconverted to bluetongue viruses between 1990 and 1994, and for which insect-trapping data were available, were selected for inclusion in the study. these herds were located at six sites along the eastern coast of queensland, australia, from approxi ... | 1997 | 9443333 |
| the use of discriminant analysis in predicting the distribution of bluetongue virus in queensland, australia. | the climatic variables that were most useful in classifying the infection status of queensland cattle herds with bluetongue virus were assessed using stepwise linear discriminant analysis. a discriminant function that included average annual rainfall and average daily maximum temperature was found to correctly classify 82.6% of uninfected herds and 72.4% of infected herds. overall, the infection status of 74.1% of herds was correctly classified. the spatial distribution of infected herds was fou ... | 1994 | 8091641 |
| a recent southern extension of the range of culicoides wadai to south-east queensland. | | 1983 | 6686762 |
| equine onchocerciasis in queensland and the northern territory of australia. | investigations were conducted on the taxonomy, distribution in the carcase, pathology and transmission of onchocerca spp. in equids from queensland and the northern territory. examination of small groups of horses and ponies revealed high infection rates with o. cervicalis, while lesser numbers were infected with o. gutturosa. o. reticulata was not found. neither of the australian species is likely to be of economic importance to the horsemeat industry. the findings support the belief that o. ce ... | 1983 | 6639515 |
| experimental infection of culicoides brevitarsis from south-east queensland with three serotypes of bluetongue virus. | laboratory-reared c. brevitarsis (biting midges) were fed on sheep which had been experimentally infected with bluetongue serotype 1 (csiro 156), bluetongue serotype 20 (csiro 19) or bluetongue serotype 21 (csiro 154), or on cattle experimentally infected with bluetongue serotype 20 (csiro 19). approximately 77 000 c. brevitarsis were exposed to sheep and 9000 to cattle. the average percentage feeding on sheep was 54% and on cattle 47%. in attempts to transmit virus by bite 3360 c. brevitarsis w ... | 1985 | 2998313 |
| habitats of culicoides spp. in an intertidal zone of southeast queensland, australia. | the distribution of immature culicoides latreille (diptera: ceratopogonidae) in the intertidal zone was investigated at redland bay near brisbane, southeast queensland. the aims of this study were to determine the distribution of culicoides immatures and to identify environmental factors influencing these distributions. light trapping of adult midges indicated that c.subimmaculatus lee & reye, c.marmoratus (skuse), c.longior hagan & reye, c.henryi lee & reye, c.cordiger macfie, may have been bre ... | 1990 | 2132964 |
| congenital bovine epizootic arthrogryposis and hydranencephaly in australia. distribution of antibodies to akabane virus in australian cattle after the 1974 epizootic. | at the end of the 1974 epizootic of bovine congenital arthrogryposis and hydranencephaly in south-eastern new south wales, an australia-wide serological survey (about 4,000 serums) was made to determine the ditribution of cattle possessing serum neutralising antibodies against akabane virus. eighty per cent of the serums from cattle in northern australia (western australia, northern territory, and queensland) were positive. a detailed study in the epizootic area in new south wales (particularly ... | 1976 | 1016149 |
| screening of oomycete fungi for their potential role in reducing the biting midge (diptera: ceratopogonidae) larval populations in hervey bay, queensland, australia. | biting midges are globally distributed pests causing significant economic losses and transmitting arbovirus diseases to both animals and humans. current biological and chemical control strategies for biting midge target destruction of adult forms, but strategies directed at immature stages of the insect have yet to be explored in australia. in the present study, coastal waters of hervey bay region in queensland, australia were screened to detect the habitats of biting midge at immature stages. t ... | 2011 | 21655137 |
| genomic characterisation of wongabel virus reveals novel genes within the rhabdoviridae. | viruses belonging to the family rhabdoviridae infect a variety of different hosts, including insects, vertebrates and plants. currently, there are approximately 200 ictv-recognised rhabdoviruses isolated around the world. however, the majority remain poorly characterised and only a fraction have been definitively assigned to genera. the genomic and transcriptional complexity displayed by several of the characterised rhabdoviruses indicates large diversity and complexity within this family. to en ... | 2008 | 18436275 |
| impact of biting midges on residential property values in hervey bay, queensland, australia. | biting midges (culicoides spp.) are an important environmental health issue in hervey bay, an area of rapid population growth in australia. it is also the gateway to a world heritage area (great sandy strait) and a destination for tourists. the spread of housing developments into suburbs close to midge breeding habitats has led to a problem for the local government responsible for managing biting insects in its area. suburbs with a severe biting midge problem were found to have significantly low ... | 2006 | 16646336 |
| collection of wind-borne haematophagous insects in the torres strait, australia. | circumstantial evidence has implicated wind-borne mosquitoes (diptera: culicidae) in the introduction of japanese encephalitis (je) virus into australia from the new guinea mainland. a study was initiated on saibai island in the northern torres strait, during january and february 2000, to identify the potential source of insects collected in aerial (kytoon) and surface-level traps. wind speed and direction were recorded to determine wind profiles during insect sampling. northerly winds capable o ... | 2003 | 12680932 |
| factors affecting numbers of culicoides in truck traps in coastal queensland. | truck trap collections of ceratopogonidae were made over a period of 27 months (november 1973-february 1976) at tingalpa creek, in southeast queensland, australia. six collections were made on each of 95 days, giving 570 observations and a total of 29,378 culicoides. two collections were made before, one at, and three after sunset. separate analyses were made of the catches of thirteen entities: male and female c. austropalpalis, c. brevitarsis, c. marksi, c. marmoratus and c. victoriae, female ... | 1998 | 9824820 |
| characterisation of wongorr virus, an australian orbivirus. | sequence analyses of vp3 gene segments of wongorr virus isolates from the northern territory of australia were compared with the cognate gene segments from picola and paroo river viruses. previous serological investigations had demonstrated some relationships between these viruses, however vp3 gene sequence and phylogenetic analyses placed these viruses within the same serogroup which was distinct from other described orbivirus serogroups. a polymerase chain reaction (pcr) was developed for the ... | 1996 | 8879140 |