| distribution and phenology of culicoides (diptera: ceratopogonidae) along the gulf of mexico. | | 1969 | 5810602 |
| bluetongue virus in sheep and cattle and culicoides variipennis and c. stellifer (diptera: ceratopogonidae) in louisiana. | the transmission of bluetongue virus (blu) to sheep and cattle relative to culicoides abundance and infection was studied in two areas of the louisiana state university agricultural center, baton rouge, la. the seroprevalence of blu in beef cattle was 70.5% in 1989 and 37.0% in 1990; 2 of 37 animals tested in both years became positive, indicating active transmission. the prevalence of blu in sheep decreased from 52.2% in 1989 to 34% in 1990; seroconversion was not detected. serotypes of positiv ... | 1993 | 8395602 |
| sympatry in the culicoides variipennis complex (diptera: ceratopogonidae): a taxonomic reassessment. | we report sympatry among larval populations of the culicoides variipennis complex in widespread and diverse aquatic habitats throughout the united states. six sites in california, nevada, new mexico, and texas were co-inhabited by c. v. occidentalis and c. v. sonorensis, whereas 8 sites in florida, georgia, louisiana, maryland, and texas were co-occupied by c. v. sonorensis and c. v. variipennis. no intermediate forms were identified either electrophoretically or morphologically in adults reared ... | 2000 | 15218909 |
| detection of bluetongue virus rna in field-collected culicoides spp. (diptera: ceratopogonidae) following the discovery of bluetongue virus serotype 1 in white-tailed deer and cattle in louisiana. | in november 2004, bluetongue virus (family reoviridae, genus orbivirus, btv) serotype 1 (btv-1) was detected for the first time in the united states from a hunter-killed deer in st. mary parish, la. in 2005, sera surveys were conducted on three cattle farms near the area where the deer was found, and btv-1-seropositive cattle were found on two of the three farms; in 2006, sera surveys from the cattle on the three farms did not detect any btv-1-positive animals. the purpose of this study was to s ... | 2010 | 20380309 |
| seasonal changes in density and tissue distribution of onchocerca cervicalis microfilariae in ponies and related changes in culicoides variipennis populations in louisiana. | seasonal changes in density and spatial distribution of onchocerca cervicalis microfilariae were studied in ventral-midline skin of 15 infected pony mares in southern louisiana. triple running mean analysis of data over a 13-mo period indicated that a distinct pattern exists in total microfilariae population density and in microfilariae occurrence in different levels of the dermis. microfilariae density reaches peak levels in the spring followed by a 58% decrease in the summer, a 19% increase in ... | 1987 | 3585627 |
| arbovirus surveillance in six states during 1972. | a virus surveillance project was established and maintained during 1972 along 10 major river drainages in six states. mosquitoes, biting flies, and blood specimens from sentinel equines were collected during 83 field trip visits to 141 arthropod collecting sites and 22 sentinel locations from april into december 1972. there were 173,074 mosquitoes tested and 303 arboviruses isolated from 11 of 41 species. from 13,388 biting flies tested, 8 arbovirus isolations were obtained in 1 of 5 species. th ... | 1976 | 7148 |
| detection of west nile virus rna in pools of three species of ceratopogonids (diptera: ceratopogonidae) collected in louisiana. | light traps were used to collect ceratopogonids in east baton rouge parish, louisiana. in total, 46,496 ceratopogonids were sorted from 4,968 light trap collections from 20 november 2002 through 25 november 2004. two hundred and nine pools containing specimens of 18 species of culicoides latreille, seven pools containing specimens of atrichopogon kieffer, and five pools containing specimens of forcipomyia meigen were tested for west nile virus (family flaviviridae, genus flavivirus, wnv) rna usi ... | 2006 | 17017242 |