| persistence of la crosse virus (california encephalitis serogroup) in north-central illinois. | la crosse (lac) virus was first isolated in illinois from a pool of 50 female aedes triseriatus mosquitoes collected in july 1976, in peoria heights. from 1978 through 1981, 27 strains (11 from males and 16 from females) of lac virus were recovered from 888 pools containing 22,021 adult a. triseriatus mosquitoes from the same study area. these mosquitoes had developed from larvae and pupae collected from 50 individually identified treeholes. of the 14 trees that yielded lac virus-positive mosqui ... | 1983 | 6824122 |
| genotypic varieties of la crosse virus isolated from different geographic regions of the continental united states and evidence for a naturally occurring intertypic recombinant la crosse virus. | the tripartite ribonucleic acid (rna) genomes of 23 alternate isolates of la crosse virus have been analyzed by the procedure of oligonucleotide fingerprinting. by comparison with the fingerprints of the three viral rna species (large, medium and small) of prototype la crosse virus, the viruses have been categorized in terms of the degree of their rna sequence relatedness. the a type la crosse viruses, which have been recovered from wisconsin, minnesota, indiana and ohio, have viral rna sequence ... | 1981 | 7246519 |
| spatial analysis of the distribution of lacrosse encephalitis in illinois, using a geographic information system and local and global spatial statistics. | the spatial and temporal distribution of lacrosse encephalitis cases in illinois was analyzed using a geographic information system (gis) and spatial statistics. case data were obtained from the illinois department of public health and mapped on the county, town, and address level. human cases were concentrated in and around the city of peoria in central illinois. local spatial statistics were used to identify hot spots where cases appear to be concentrated in the peoria region. several small to ... | 1997 | 9347966 |
| isolation of la crosse, cache valley, and potosi viruses from aedes mosquitoes (diptera: culicidae) collected at used-tire sites in illinois during 1994-1995. | prospective studies were conducted at used-tire sites in illinois during 1994-1995 in an effort to isolate arboviruses from mosquitoes, particularly aedes albopictus (skuse) and aedes triseriatus (say). three isolates of potosi virus were obtained from ae. albopictus collected at a waste tire site in jasper county during 1994 and 1995. also, a single isolate of cache valley virus was obtained from ae. albopictus collected at the jasper county site during 1995. these are the first records of arbo ... | 1998 | 9701947 |
| introduction of aedes albopictus into a la crosse virus--enzootic site in illinois. | in late summer and fall 1997, aedes albopictus mosquitoes were found in peoria, illinois, a long recognized focus of la crosse virus transmission. larvae were found in tires and other artificial containers, biting adults were recovered, and eggs were collected in oviposition traps within a 25-ha area. one chipmunk trapped < 0.25 km from the infested area tested positive for neutralizing antibodies against la crosse virus. | 1998 | 9866739 |
| overwintering and establishment of aedes albopictus (diptera: culicidae) in an urban la crosse virus enzootic site in illinois. | in 1997, aedes albopictus (skuse) was discovered in peoria, il, a known focus of la crosse (lac) virus transmission. this accidental introduction provided an opportunity to determine whether ae. albopictus would reemerge in the spring or summer and, if successful overwintering occurred, to follow changes in the geographic range of ae. albopictus, and to compare its distribution to that of the local treehole mosquito and lac vector aedes triseriatus (say). in 1998, 25 oviposition traps were place ... | 2000 | 15535592 |