| the ecology and behavior of aedes atlanticus d. & k. and other species with reference to keystone virus in the houston area, texas. | | 1975 | 1223304 |
| occurrence and evolutionary significance of a california encephalitis-like virus in aedes squamiger (diptera: culicidae). | more than 12,000 aedes increpitus dyar and 4,600 aedes squamiger (coquillett) were tested for the presence of arboviruses to test the hypothesis that there is a coevolutionary relationship between aedes (ochlerotatus) mosquitoes and california serogroup viruses. five strains of a california encephalitis-like virus were isolated from adults reared from larvae of ae. squamiger collected in january 1989 from a coastal salt marsh at morro bay, san luis obispo county, california. viruses were isolate ... | 1991 | 1941932 |
| an assessment of the biological capacity of a sacramento valley population of aedes melanimon to vector arboviruses. | daily survivorship, duration of the gonotrophic cycle, absolute abundance and season-long relative abundance were estimated for aedes melanimon in the sacramento valley of california in 1987 and 1988 using mark-release-recapture (mrr) techniques and by monitoring changes in the abundance and parity rate of the native population. one objective of these studies was to determine the extent to which a. melanimon was biologically capable of serving as a horizontal arbovirus vector. daily survivorship ... | 1991 | 2042703 |
| isolation of jamestown canyon virus (california serogroup) from aedes mosquitoes in an enzootic focus in michigan. | twenty isolates of jamestown canyon virus were obtained from adult females of 5 aedes species collected at the houghton lake wildlife research area, missaukee county, in north-central michigan between 1985 and 1989. fourteen were from aedes provocans, and 6 were from 4 other snowmelt aedes species. one isolate of trivittatus virus and one cache valley-like virus were also obtained. seasonal succession patterns for numerous mosquito species were recorded over 4 years. the temporal association of ... | 1990 | 2230774 |
| incrimination of aedes provocans as a vector of jamestown canyon virus in an enzootic focus of northeastern new york. | a 2-year field study was conducted in southern saratoga county, new york, to determine which species of the aedes communis group mosquitoes were potential vectors of jamestown canyon (jc) virus. a total of 23,890 mosquitoes (890 pools) were processed for virus isolation in 1988-89, yielding 17 jc virus isolates from ae. provocans and one isolate each from ae. communis, ae. intrudens and ae. punctor. minimum field infection rates (mfir) and daily mfirs as high as 1:219 and 1:38, respectively, wer ... | 1990 | 2230781 |
| prevalence of neutralizing antibodies against california and bunyamwera serogroup viruses in deer from mountainous areas of california. | plaque reduction-serum dilution neutralization was used to evaluate the status of bunyavirus activity in deer in mountainous areas of california. antibodies against 9 bunyaviruses were measured in 337 mule deer (odocoileus hemionus hemionus, o. hemionus californicus, and o. hemionus inyoensis) and black-tailed deer (o. hemionus columbianus). more deer from high mountainous areas had neutralizing antibodies against jamestown canyon virus than did deer from low mountainous areas (23% vs. 9%; p les ... | 1989 | 2496610 |
| spatial distribution of aedes triseriatus eggs in a site endemic for la crosse encephalitis virus. | egg laying behavior in aedes triseriatus was studied in an oak woodlot endemic for la crosse encephalitis virus in southwestern wisconsin. daily counts from oviposition traps allowed the calculation of spatial distribution parameters for eggs during 1988. egg distribution along an ellipsoidal transect of 25 traps was clumped with some traps being more attractive to ovipositing female ae. triseriatus than others. females were estimated to deposit a mean of 31 +/- 9.8 eggs per oviposition. | 1990 | 2370533 |
| persistence of mosquito-borne viruses in kern county, california, 1983-1988. | the persistence of arboviruses was studied from 1983 to 1988 in mixed agriculture, marsh, riparian, and foothill habitats in kern county, ca. western equine encephalomyelitis (wee) virus was isolated frequently during 1983 from culex tarsalis and aedes melanimon and was detected by the seroconversion of sentinel chickens. wee virus then disappeared, even though vector competence studies during 1984-1986 showed that cx. tarsalis was able to transmit wee virus. st. louis encephalitis (sle) virus w ... | 1990 | 2240370 |
| identification of aedes campestris from new mexico: with notes on the isolation of western equine encephalitis and other arboviruses. | an arbovirus survey was conducted during august 1985 at white sands missile range in southcentral new mexico following a suspected arboviral disease epizootic among feral horses. a total of 20,566 mosquitoes (18,505 females and 2,061 males) and 8,900 biting gnats were collected and assayed for virus. female mosquitoes were principally aedes campestris (54.8%), aedes dorsalis (30.4%) and culex tarsalis (13.2%). arboviruses were not isolated from biting gnats, but mosquitoes yielded a total of 37 ... | 1986 | 2906989 |
| distribution of neutralizing antibodies to california and bunyamwera serogroup viruses in horses and rodents in california. | neutralization tests were done on sera from 141 horses from high elevation regions of california. antibody prevalences to jamestown canyon, snowshoe hare, and california encephalitis viruses in the california serogroup and northway virus in the bunyamwera serogroup were 55%, 43%, 18%, and 46%, respectively. in 51 horses from rural low elevation regions, seroprevalences were 31%, 35%, 35%, and 37%, respectively. twenty-four horses from a suburban lowland area were seronegative, except for a singl ... | 1990 | 2107770 |
| isolation of jamestown canyon virus from boreal aedes mosquitoes from the sierra nevada of california. | more than 28,000 mosquitoes in four genera were collected from high elevation (greater than or equal to 1,000 m) areas of california during 1988-89 and tested for virus by plaque assay in vero cells. viruses were serogrouped by enzyme immunoassay and serotyped by cross-neutralization. six strains of jamestown canyon virus in the california serogroup were isolated from three species of boreal aedes in the aedes communis group of the subgenus ochlerotatus. all isolates were from mosquitoes collect ... | 1991 | 2035746 |
| adult body size and survivorship in a field population of aedes triseriatus. | aedes triseriatus pupae, host-seeking, and ovipositing females were collected at a southern wisconsin site endemic for la crosse encephalitis virus. the host-seeking and ovipositing females were age-graded by the detinova and polovodova techniques, respectively. wing lengths were determined for all mosquitoes. wing lengths of the mosquitoes collected as pupae were predicted from pupal weight by a simple regression equation. there was significant seasonal variation in body size of adult females, ... | 1988 | 3193107 |
| serum antibody prevalence for herpesvirus sylvilagus, bacillus piliformis and california serogroup arboviruses in cottontail rabbits from pennsylvania. | a serologic survey of 60 eastern cottontail rabbits (sylvilagus floridanus) from three counties in pennsylvania was conducted in march 1983. serum antibody prevalences for herpesvirus sylvilagus and la crosse virus (california serogroup) were less than 4%. there was no evidence of previous exposure to either jamestown canyon or snowshoe hare viruses (california serogroup). antibody to trivittatus virus (california serogroup) was found in 60% of the 20 cottontails from york county. no cottontails ... | 1988 | 3373643 |
| prevalence of neutralizing antibody to jamestown canyon virus (california group) in populations of elk and moose in northern michigan and ontario, canada. | blood samples were collected from free-ranging elk (cervus elaphus) harvested in michigan's northern lower peninsula, from moose (alces alces) relocated from ontario's algonquin provincial park to michigan's upper peninsula, and from moose from michigan's isle royale national park. sera were tested by serum dilution neutralization tests in vero cell culture for neutralizing antibody to california serogroup viruses, in particular jamestown canyon (jc), la crosse/snowshoe hare (lac/ssh), and trivi ... | 1986 | 3503129 |
| absence of la crosse virus in the presence of aedes triseriatus on the delmarva peninsula. | between 1980 and 1984, field studies were conducted in 2 areas on the delmarva peninsula to identify the presence of la crosse (lac) virus. ovitraps were used to collect eggs of aedes triseriatus complex mosquitoes. no virus was obtained from 969 pools containing 22,370 adult mosquitoes reared from eggs. only 1 of 143 raccoon serum samples had neutralizing antibody to lac virus; 36 sentinel domestic goats, and 99 other wild mammal serum samples were negative. the apparent absence of lac virus ma ... | 1986 | 3507467 |
| aedes canadensis, a vector of la crosse virus (california serogroup) in ohio. | aedes canadensis was shown to be a vector of la crosse (lac) virus in ohio through isolation of lac virus from field-collected specimens, infection of 54 of 72 (75%) individuals when fed on viremic suckling mice and transmission of lac virus by 29 (54%) of infected individuals. frequent identification of ae. canadensis as a human biting species implicates it as an auxiliary vector of lac virus to man. a possible regional association in ohio of ae. canadensis and type c lac virus is discussed. | 1986 | 3507473 |
| serological evidence of california group and cache valley virus infection in minnesota white-tailed deer. | blood samples were obtained from 138 white-tailed deer (odocoileus virginianus) harvested at three sites surrounding the greater minneapolis-st. paul, minnesota, metropolitan area (usa) and tested for neutralizing antibody to cache valley virus and three california serogroup (jamestown canyon, la crosse, trivittatus) viruses (bunyaviridae). deer at each site had neutralizing antibody to one or more california serogroup viruses and/or cache valley virus. the majority of adult deer (85%) had antib ... | 1991 | 1906113 |
| antibodies to la crosse virus in eastern chipmunks in indiana near an aedes albopictus population. | blood samples of 34 eastern chipmunks trapped in the vicinity of an aedes albopictus population near new alsace, in, were tested for neutralizing antibodies to la crosse (lac) virus and other california group viruses. two samples were positive for lac antibodies. analysis of mosquito bloodmeals demonstrated that both ae. albopictus and ae. triseriatus from the site fed on chipmunks. this note documents the first record of lac antibodies in sylvan rodents from indiana, the presence of lac virus i ... | 1991 | 1787412 |
| oral transmission of jamestown canyon virus by aedes provocans mosquitoes from northeastern new york. | aedes provocans were allowed to feed on a bloodmeal containing 5.6 log10 tcid50/ml of jamestown canyon (jc) virus. after 14 days of incubation at 21 degrees c and 80% rh, 100% (36/36) were midgut infected, 50% (18/36) developed disseminated infections and 50% (9/18) of the latter specimens transmitted virus to capillary tubes. when mosquitoes were intrathoracically inoculated with 6.1 log10 tcid50/ml of jc virus, 100% (40/40) became disseminated infected and 95% (38/40) transmitted virus after 1 ... | 1991 | 1675258 |
| vector competence of california mosquitoes for california encephalitis and california encephalitis-like viruses. | mosquitoes collected from coastal, inland valley, and alpine locations in california were evaluated for their experimental vector competence for two viruses in the california serogroup (bunyaviridae:bunyavirus). aedes squamiger, a coastal salt marsh mosquito, was an efficient vector of a california encephalitis (ce)-like virus isolated from its habitat (89% of the pledget-fed females became infected and 61% transmitted virus). aedes dorsalis, a coastal mosquito, and ae. melanimon, an inland vall ... | 1992 | 1360192 |
| seroepidemiology of california and bunyamwera serogroup bunyavirus infections in humans in california. | several human populations in california were surveyed cross-sectionally and longitudinally for neutralizing antibodies to selected arthropod-borne bunyaviruses in the california and bunyamwera serogroups. overall, the prevalence of antibodies to california serogroup viruses was 6.4% in 702 individuals sampled during 1963-1988. comparative antibody titers in individual sera indicated that 4.1% and 1.6% of these infections were caused by viruses similar or identical to jamestown canyon and califor ... | 1992 | 1357960 |
| studies on the epidemiology of california encephalitis in an endemic area in ohio in 1971. | | 1975 | 1200262 |
| trivittatus virus infections in wild mammals and sentinel rabbits in central iowa. | a serological survey was conducted in iowa to determine the prevalence rate of california group virus antibodies in sera of several vertebrate species. serum specimens were assayed for infectivity-neutralizing antibody in a microneutralization system with baby hamster kidney cell culture. of 77 sera assayed, 21 (27%) neutralized trivittatus (tvt) virus infectivity. the antibody prevalence rate was highest for eastern cottontail rabbits inasmuch as 46% (10/22) of the serum specimens form this spe ... | 1975 | 1200251 |
| isolation of viruses of the california encephalitis virus group from boreal aedes mosquitoes. | | 1969 | 5810801 |
| isolation of jamestown canyon serotype of california encephalitis virus from naturally infected aedes mosquitoes and tabanids. | | 1969 | 5768778 |
| aedes triseriatus and la crosse virus: geographic variation in vector susceptibility and ability to transmit. | in laboratory tests, 20 strains of aedes triseriatus differed widely in response to la crosse virus. infection rates ranged from 40% to 93%, and rate of transmission ranged from 20% to 90%. a control strain, tested in seven different trials, showed no significant variation in susceptibility (71--77%) or transmission ability (54--68%). a distinct geographic pattern was evident. the susceptibility and transmission rates of strains from areas where la crosse virus is endemic were lower than that of ... | 1977 | 907059 |
| host preferences of aedes trivittatus (diptera: culicidae) in central iowa. | the vertebrate host preferences of aedes trivittatus mosquitoes were studied to gain an insight into the possible hosts of trivittatus (tvt) virus (california encephalitis group) in iowa. engorged mosquitoes were collected with a malaise trap and dry ice-baited cdc miniature light traps. the origin of mosquito blood meals was determined by the capillary tube precipitin test. of 600 a. trivittatus blood meals tested, 409 (68.2%) reacted positively with anti-rabbit serum. the incidences of mosquit ... | 1975 | 1190374 |
| arbovirus surveillance in florida: wild vertebrate studies 1965-1974. | wildlife species from 38 of florida's 67 counties were surveyed over a 10 year period for the presence of antibody to the five major arboviruses circulating in the state. the routine screening of 7891 sera from wild birds and mammals via the hemagglutination-inhibition (h1) test with selected reactors subjected to serum neutralization testing has 1) provided information regarding geographic distribution and seasonality of circulation of these viruses 2) identified enzootic foci of infection and ... | 1975 | 1152173 |
| california virus in new york state. isolation and characterization of california encephalitis virus complex from aedes cinereus. | | 1969 | 5764192 |
| towards a quantitative understanding of the epidemiology of keystone virus in the eastern united states. | the implications of the keystone virus--aedes atlanticus transmission cycle are explored in the context of a quantitative model. among the variables considered are the vertical transmission rate, the effect of the virus upon vector fertility and survival, vector densities and distributions, the proportion susceptible in the vertebrate population, the attractiveness of different vertebrates to the vector and vector survival rates. the logical relationships between these several variables are expl ... | 1978 | 646025 |
| epidemiology and ecology of the california serogroup viruses. | the california serogroup viruses are important human pathogens, originally discovered in the united states, but now recognized to occur and cause disease in many parts of the world. in addition to their significance to public health, study of their natural history has resulted in a better understanding of the way in which arboviruses are maintained in nature. viruses of the california serogroup have also been carefully investigated on the molecular level, resulting in a better appreciation of ho ... | 1987 | 2891311 |
| california arbovirus (la crosse) infections. iii. epidemiology of california encephalitis in minnesota. | mosquitoes (eggs, larvae, and adults), small woodland animals, and residents of an area where california encephalitis is endemic were studied to elucidate the host-vector cycle of la crosse virus. elementary schoolchildren from surrounding communities and gray squirrels from another area were tested to compare the prevelence of serum antibodies to la crosse virus in areas where the disease is endemic with the prevalence of these antibodies in areas where the disease is not endemic. from 1971 to ... | 1976 | 3613 |
| natural transmission of keystone virus to sentinel rabbits on the delmarva peninsula. | domestic rabbits were exposed in the pocomoke cypress swamp from early may through october 1973, to act as sentinel indicators of keystone (key) virus transmission on the delaware-maryland-virginia (delmarva) peninsula. rabbits were bled weekly and their sera were tested for the presence of neutralizing antibody to both key and james-town canyon (jc) viruses. adult mosquito activity was monitored concurrently by cdc miniature light traps with dry ice. of 100 rabbits exposed, 20 rabbits acquired ... | 1978 | 717629 |
| mosquito-borne arboviruses in arctic america. | mosquito-borne arboviruses are prevalent throughout subarctic regions of canada and alaska, principally in the boreal forest extending between latitudes 53 and 66 degrees n, but they have been identified in tundra regions as far north as 70 degrees n. all mosquito-borne agents have been bunyaviruses, comprising principally the snowshoe hare subtype of california encephalitis (ce) virus, but also northway virus. mosquito vectors comprise several aedes species and culiseta inornata, all of which h ... | 1975 | 1602 |
| recently introduced aedes albopictus in the united states: potential vector of la crosse virus (bunyaviridae: california serogroup). | a population of aedes albopictus collected in 1986 in harris county, texas, was evaluated for its vector competence with 4 california serogroup viruses (jamestown canyon, keystone, la crosse and trivittatus). rates of midgut infection, dissemination of virus beyond the midgut and oral transmission to suckling mice were markedly different for the 4 viruses in a pattern representative of the antigenic relationships known for the california serogroup. only la crosse virus was shown to be efficientl ... | 1989 | 2584976 |
| the discovery decade of arbovirus research in western north america, 1940-1949. | | 1987 | 2891315 |
| a comparison of la crosse virus isolated obtained from different ecological niches and an analysis of the structural components of california encephalitis serogroup viruses and other bunyaviruses. | analyses of the oligonucleotide fingerprints of the three genome ribonucleic acid (rna) species of 11 isolates of la crosse (lac) virus, obtained from various ecological niches in the northern united states and compared to those of prototype lac virus, showed that in each place from which these isolates were obtained lac variants and varieties were present with related, but distinguishable, nucleotide sequences for their large, medium, or small rna species. the rna genomes of prototypes trivitta ... | 1979 | 453439 |
| virus-vector-host relationships of aedes stimulans and jamestown canyon virus in a northern indiana enzootic focus. | collections of hematophagous diptera at the kingsbury state fish and wildlife area in northern indiana between 1982 and 1984 yielded 118,972 mosquitoes from which 5 isolates of jamestown canyon virus and 3 isolates of trivittatus virus were obtained. all jamestown canyon isolates were from aedes stimulans, including 1 from a pool of newly emerged males and 2 from pools of newly emerged females. these 3 isolates suggest that jamestown canyon virus is transovarially transmitted by ae. stimulans. a ... | 1986 | 2878626 |
| serological evidence of california serogroup virus activity in oregon. | we wished to demonstrate evidence of the presence of california serogroup viruses in oregon and to test for the presence of certain other arboviruses in large ungulates. blood samples from black-tailed deer (odocoileus hemionus columbianus), mule deer (o. hemionus hemionus), and roosevelt elk (cervus elaphus roosevelti) from nine counties in oregon were tested by serum-dilution plaque reduction neutralization for antibody to california serogroup viruses, including snowshoe hare, california encep ... | 1987 | 3586196 |
| isolation of cache valley virus and detection of antibody for selected arboviruses in michigan horses in 1980. | blood samples collected in september and november 1980 from 87 horses in southwestern michigan were examined for virus isolation and for plaque-reduction neutralizing antibody against selected arboviruses. cache valley virus was isolated from the blood of a clinically normal horse in st joseph county in september. the age-specific antibody prevalence for cache valley virus indicated enzootic transmission in the study area. the high antibody prevalence and the lack of age-specific antibody preval ... | 1987 | 3631684 |
| seroconversion rates to jamestown canyon virus among six populations of white-tailed deer (odocoileus virginianus) in indiana. | the annual seroconversion of fawns, yearlings, and adult white-tailed deer (odocoileus virginianus) to jamestown canyon virus (california group) was followed at six indiana sites from 1981 through 1984. in all, sera from 1,642 deer (515 fawns, 618 yearlings, and 509 adults) were tested for neutralizing antibody to three california serogroup viruses: jamestown canyon, la crosse, and trivittatus. virtually all deer with specific neutralizing antibody showed evidence of a prior infection with james ... | 1987 | 3820426 |
| jamestown canyon virus (california serogroup) is the etiologic agent of widespread infection in michigan humans. | in a sample population of 780 michigan residents tested for neutralizing antibodies to california serogroup viruses, 216 (27.7%) had specific neutralizing antibody to jamestown canyon virus. an additional eight (1.0%) had specific neutralizing to trivittatus virus; none had specific neutralizing antibody to la crosse virus. significantly more male residents than female residents of the lower peninsula had antibody to jamestown canyon virus. the frequency of neutralizing antibody titers fits the ... | 1986 | 3953951 |
| la crosse virus infection and disease in western north carolina. | active surveillance for la crosse infection from 1977 to 1979 revealed 12 laboratory documented cases in children from the cherokee reservation and nearby areas of western north carolina. the annual rate of hospitalization with la crosse virus was isolated from two of 34 pools of male and one of 34 pools of female aedes triseriatus mosquitoes reared from larvae collected around the residences of reservation children who had been hospitalized with encephalitis. the occurrence of the recent cases, ... | 1982 | 7081548 |
| serologic evidence of arboviral infections in white-tailed deer from central wisconsin. | a survey conducted during 1979-1980 on white-tailed deer (odocoileus virginianus) in central wisconsin revealed serological evidence of infection by selected arboviruses. among sera from 41 deer, antibody was detected for jamestown canyon virus (56%) and bunyamwera group virus (80%), demonstrating their continuing endemic activity. antibody for la crosse virus, not found previously in sera from deer in central wisconsin, also was detected (5%) in this study. | 1989 | 2716117 |
| ecological aspects of california encephalitis viruses in the arid west. | | 1983 | 6135221 |
| california serogroup virus infections in wisconsin domestic animals. | a serologic survey and experimental virus transmission studies were done to assess the role of domestic animals as amplifier hosts of la crosse (lacv) and jamestown canyon (jcv) viruses. serum from 319 cows, 88 dogs, 122 equines, 47 swine, 10 goats, and 4 cats were tested for neutralizing antibody to lacv, jcv, trivittatus (tvtv), and snowshoe hare (sshv) viruses. antibody prevalences of lacv, tvtv, and sshv were less than 10% in all species. antibody to jcv was detected in all species except ca ... | 1988 | 3189702 |
| an ecological study of jamestown canyon virus on the delmarva peninsula, with emphasis on its possible vector. | | 1986 | 2879043 |
| california encephalitis virus: serological evidence of human infections in alaska. | | 1972 | 4402443 |
| historical perspectives on california encephalitis virus in california. | cev is primarily associated with ae. melanimon as its maintenance host and vector in california. a few species of lagomorphs and rodents will develop a transient viremia when infected. infection of domestic mammals and man is frequent but rarely results in a clinical disease. extensive field and laboratory studies lead to the conclusion that cev probably is a mosquito virus that is partially adapted to a narrow range of vertebrate hosts but is not reliant on vertebrates for its continuous existe ... | 1983 | 6135217 |
| california serogroup virus infections in ohio: an 18-year retrospective summary. | | 1983 | 6135218 |
| california serogroup viruses in new york state: a retrospective analysis of subtype distribution patterns and their epidemiologic significance, 1965-1981. | | 1983 | 6135220 |
| california virus encephalitis in north carolina. | | 1978 | 281597 |
| neuropathologic and virus assay studies of experimental california virus encephalitis in the mouse. | | 1971 | 5542544 |
| california encephalitis virus. report of three cases and review of the literature. | | 1966 | 5911741 |
| california serogroup viruses in new york state: the role of subtypes in human infections. | the roles of various subtypes of the california serogroup viruses as infectious agents and as neuropathogens were evaluated by using the plaque reduction neutralization test. sera from 394 patients with central nervous system (cns) infections during 1971-1982 and from 501 persons without cns manifestations were studied. jamestown canyon (jc) and la crosse (lac) viruses were found to have been common infectious agents in new york state for at least 16 years. jc virus was the prevalent indicated a ... | 1984 | 6507732 |
| aedes triseriatus: vector biology in relationship to the persistence of la crosse virus in endemic foci. | | 1983 | 6346342 |
| human infections with la crosse virus in georgia, 1982. | eight cases of central nervous system infection due to la crosse (california serogroup) virus were detected in georgia children in 1982. the patients were residents of the state, without histories of travel away from the vicinities of their homes during the 30 days before the onset of their illnesses. all were hospitalized with a diagnosis of aseptic meningitis or encephalitis; none had sequelae. onset dates were from may 1 to aug 30. distribution of cases within the state suggested that active ... | 1984 | 6463696 |
| dispersion of gravid aedes triseriatus (diptera: culicidae) from woodlands into open terrain. | | 1984 | 6492082 |
| 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 |
| infection of white-tailed deer (odocoileus virginianus) in michigan with jamestown canyon virus (california serogroup) and the importance of maternal antibody in viral maintenance. | sera collected from a captive population of white-tailed deer (odocoileus virginianus) penned in the lower peninsula of michigan were assayed over a 29-mo period for neutralizing antibody to california serogroup viruses. in all, 130 individual white-tailed deer were bled one to 22 times between june 1983 and november 1985. of the 130 sampled after active transmission had ceased, or passage of maternal antibody in colostrum had occurred, only one (0.8%), a newborn fawn, had no serum neutralizing ... | 1987 | 3102763 |
| california virus (la crosse strain) encephalitis. | | 1969 | 5353448 |
| bloodmeal sources of aedes triseriatus and aedes vexans in a southern wisconsin forest endemic for la crosse encephalitis virus. | the micro enzyme-linked immunosorbent assay (elisa) was used to specifically identify bloodmeal sources of aedes triseriatus say and aedes vexans meigen collected at a site endemic for la crosse (lac) encephalitis virus. deer were the source of 65% of ae. triseriatus and 94% of aedes vexans bloodmeals, respectively. chipmunks and tree squirrels, which are considered to be the major vertebrate amplifying hosts of lac virus, were the sources of 8% and 16%, respectively, of the bloodmeals of ae. tr ... | 1982 | 7072901 |
| california encephalitis virus causes subacute encephalomyelitis in an adult. | a 24-year-old man from rural mississippi had a case of california encephalitis (ce) that evolved as a subacute encephalomyelitis. the incidence of ce in adults is low, especially in the southeastern united states, and to our knowledge the clinical profile of symptomatic disease in adults has not been established. the characteristics of ce and st louis encephalitis, the usual cause of arboviral illness affecting adults in the southeast, differ. | 1985 | 3966890 |
| a case of encephalitis in a human associated with a serologic rise to jamestown canyon virus. | an 8-year-old girl living in rural southwestern michigan experienced sudden onset of symptoms beginning with headache, dizziness and fever which rapidly progressed to central nervous system involvement with seizures and coma. following 27 days of hospitalization her recovery was uneventful, with no apparent sequelae 15 months after discharge. serologic studies of paired sera showed a rise in antibody to jamestown canyon virus, a member of the california serogroup (family bunyaviridae). specific ... | 1982 | 7149109 |
| temporal abundance, parity, survival rates, and arbovirus isolation of field-collected container-inhabiting mosquitoes in eastern tennessee. | surveillance of container-inhabiting mosquitoes was conducted from june 17 through november 9, 1998, at 2 1997 la crosse virus (lac) human case sites (knox and cocke counties, tennessee). mosquitoes were collected weekly with 2 dry ice-baited centers for disease control miniature light traps, 2 omnidirectional fay traps, and 40 oviposition traps at each site. a total of 8,408 mosquitoes, composed of ochlerotatus triseriatus (n = 2,095) and aedes albopictus (n = 6,313), were reared or collected a ... | 2002 | 12322937 |
| serologic evidence of jamestown canyon and keystone virus infection in vertebrates of the delmarva peninsula. | serological data accumulated during the past decade indicated that a variety of feral and domestic animals of the delaware-maryland-virginia (delmarva) peninsula were infected with jamestown canyon (jc) and/or keystone (key) viruses (bunyaviridae, california serogroup). neutralizing (n) antibody to jc virus was most prevalent in white-tailed deer, sika deer, cottontail rabbits and horses. key virus n antibody was detected most frequently in gray squirrels and domestic goats. n antibody indicativ ... | 1982 | 7149110 |
| isolation of california encephalitis virus from the blood of a snowshoe hare (lepus americanus) in western montana. | | 1961 | 13688984 |
| california encephalitis virus. serologic survey of small wind mammals in northern united states and southern canada and isolation of additional strains. | | 1963 | 14043542 |
| reported encephalitis associated with california serogroup virus infections in the united states, 1963-1981. | | 1983 | 6867038 |
| la crosse encephalitis: occurrence of disease and control in a suburban area. | fifteen (6.4%) of 233 residents sampled in state road coulee (src) during 1972-73 had antibodies neutralizing la crosse (lac) virus, 9 (3.9%) trivittatus (tvt), 12 (5.2%) jamestown canyon (jc) and 2 (0.9%) bunyamwera serogroup virus. six of seven youths who had antibodies to lac virus had been ill: three were serologically confirmed as cases of lac encephalitis and three had possibly related illnesses. the other reported no illness. possibly related illnesses were reported by 1 of 10 adults with ... | 1983 | 6867036 |
| california serogroup viruses in iowa. | | 1983 | 6867037 |
| evaluation of the efficiency of transovarial transmission of california encephalitis viral strains in aedes dorsalis and aedes melanimon. | california encephalitis (ce) virus was transmitted transovarially by its natural vector, aedes melanimon. vertical transmission rates ranged from 13-26% in geographical populations of ae. melanimon infected with ce virus by intrathoracic inoculation. no consistent pattern of transmission rates was detected for location or time of year mosquito collection. vertical transmission rates ranged from 9-29% in aedes dorsalis inoculated with ce viral strains isolated from ae. melanimon collected in cali ... | 1982 | 7200334 |
| taxonomy, classification, and geographic distribution of california serogroup bunyaviruses. | | 1983 | 6346334 |
| biology of aedes triseriatus: some factors affecting control. | | 1983 | 6346339 |
| isolation of jamestown canyon and snowshoe hare viruses (california serogroup) from aedes mosquitoes in western massachusetts. | three isolates of jamestown canyon virus and one isolate of snowshoe hare virus (california serogroup) were obtained from adult aedes females collected in western massachusetts in 1982. jamestown canyon virus was isolated from aedes abserratus/punctor once, and from aedes intrudens twice. snowshoe hare virus was isolated from aedes stimulans group mosquitoes. la crosse encephalitis (lac) virus was not isolated from 1,552 adult aedes triseriatus, nor from 22,557 aedes triseriatus larvae. however, ... | 1993 | 8350066 |
| vector competence of alpine, central valley, and coastal mosquitoes (diptera: culicidae) from california for jamestown canyon virus. | mosquitoes collected from alpine, central valley, and coastal habitats in california were evaluated for their vector competence for four strains of jamestown canyon (jc) virus. three of the viral strains examined were isolated from alpine aedes species collected in california, and one, the prototype jc virus, was isolated from culiseta inornata (williston) collected in colorado. alpine aedes tahoensis dyar, ae. cataphylla dyar, ae. hexodontus dyar, ae. increpitus dyar, ae. clivis lanzaro and eld ... | 1993 | 8459417 |
| tropism of bunyaviruses: evidence for a g1 glycoprotein-mediated entry pathway common to the california serogroup. | the california serogroup is composed of antigenically and biologically related viruses within the bunyavirus genus of the bunyaviridae. we used a large panel of murine cells to study their tissue tropisms and found virtually identical patterns of viral replication among all of the members of this serogroup, in contrast to other members of the family (bunyamwera, cache valley, and punta toro viruses). by analyzing the nonpermissive infections with both an rna dot-blot and a virus binding assay, w ... | 1995 | 8553534 |
| control of aedes triseriatus in la crosse, wisconsin. | | 1983 | 6867040 |
| ecology of mosquitoes and lack of arbovirus activity at morro bay, san luis obispo county, california. | during 1994-95, totals of 17,656 adult females and 111,104 adults reared from field-collected immatures comprising 19 species in 4 genera of mosquitoes were collected from morro bay estuary and surrounding environs in san luis obispo county, california. aedes dorsalis was the dominant summer mosquito, whereas aedes squamiger and ae. washinoi were abundant during winter and early spring. host-seeking culex tarsalis were collected infrequently, even though immatures were collected frequently from ... | 1996 | 9046476 |
| serologic evidence of jamestown canyon virus infection in white-tailed deer populations from connecticut. | we determined the prevalence and distribution of jamestown canyon (jc) virus antibody in white-tailed deer (odocoileus virginianus) populations in connecticut, usa. sera were collected from hunter-killed deer during 1993. antibody to jc virus was detected by enzyme-linked immunosorbent assay (elisa) in 92 (21%) of 446 deer sera, and was uniformly distributed among geographic sites. twenty-one elisa-positive sera were tested and confirmed positive by plaque reduction neutralization testing. this ... | 1997 | 9249710 |
| severe sepsis caused by california serogroup orthobunyavirus. | | 2015 | 26401906 |
| arboviruses from western utah, usa, 1967-1976. | | 1983 | 6135808 |
| jamestown canyon virus: the etiologic agent of an emerging human disease? | | 1983 | 6191343 |
| emergence of california encephalitis as a continental epidemiological, virological, and human disease problem. | | 1983 | 6306692 |
| arbovirus surveillance in south carolina, 1996-98. | arboviruses isolated and identified from mosquitoes in south carolina (usa) are described, including new state records for eastern equine encephalitis virus (eee), st. louis encephalitis virus (sle), flanders virus, tensaw virus (ten), and a variant of jamestown canyon virus (jc). mosquitoes were collected at 52 locations in 30 of 46 south carolina counties beginning in june 1996, and ending in october 1998, and tested for arboviruses. of 1,329 mosquito pools tested by virus isolation (85,806 mo ... | 2001 | 11345423 |
| occurrence of la crosse (california serogroup) encephalitis viral infections in illinois. | la crosse (lac) virus (california encephalitis serogroup) was identified as the etiologic agent of disease in 61 cases of california encephalitis (ce) that occurred in illinois between 1976 and 1980. this group represented 54% of all 114 laboratory-diagnosed cases of ce between 1966 and 1980. key epidemiologic observations included: 88% of the 61 cases had onset in july, august, or september; the 5- to 9-year-old age group represented 48% of the cases; the male:female sex ratio was 2:1; 97% of t ... | 1983 | 6881433 |
| california encephalitis virus, a newly described agent. | in three cases of encephalitis in humans that occurred in the area where the newly described california virus was isolated from mosquitoes, serological evidence seemed to indict the california virus as the etiological agent. in the case of an infant with very severe disease, the serological evidence was convincing; the evidence was almost as strong in the case of a seven-year-old boy; the results in an adult were equivocal. inapparent infection in man is quite common as indicated by neutralizati ... | 1952 | 13009479 |
| california encephalitis virus: an evaluation of its continued endemic status in kern county, california. | | 1964 | 14215833 |
| 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 |
| detection of arboviral rna directly from mosquito homogenates by reverse-transcription-polymerase chain reaction. | many arthropod-borne viruses (arboviruses) are important human pathogens medically. the development of an effective technique to detect the viruses by using nucleic acid amplification, such as polymerase chain reaction (pcr), improves not only clinical diagnosis but also virologic surveillance of mosquito vectors in the field. in this study, the development of an improved and simplified assay is described for detection of mosquitoes infected with eastern equine encephalitis (eee) virus, cache va ... | 2001 | 11337046 |
| la crosse and other forms of california encephalitis. | the california serogroup viruses are mosquito viruses that cause human infections on five continents. they are maintained and amplified in nature by a wide variety of mosquito vectors and mammalian hosts; they thrive in a remarkably wide variety of microclimates (eg, tropical, coastal temperate marshland, lowland river valleys, alpine valleys and highlands, high boreal deserts, and arctic steppes). in 1993, california serogroup viruses caused 71% of all cases of arboviral illness in the united s ... | 1999 | 10025535 |
| jamestown canyon virus: seroprevalence in connecticut. | | 2001 | 11747714 |
| tickborne powassan virus infections among wisconsin residents. | powassan virus (powv) is a tickborne flavivirus that causes a rare but potentially life-threatening illness. the first reported case of powv infection in a wisconsin resident occurred in 2003. enhanced surveillance and testing detected 2 additional cases. | 2010 | 20443328 |
| la crosse virus neuroinvasive disease - missouri, 2009. | la crosse virus (lacv), a california serogroup bunyavirus, is a leading cause of pediatric arboviral encephalitis in the united states and is transmitted primarily by the eastern treehole mosquito (aedes triseriatus). on august 7, 2009, the missouri department of health and senior services (mdhss) was notified of suspected lacv neuroinvasive disease in a boy aged 8 years from northwest missouri. laboratory testing at cdc confirmed lacv infection. an environmental inspection identified multiple v ... | 2010 | 20651642 |
| human jamestown canyon virus infection --- montana, 2009. | jamestown canyon virus (jcv) is a mosquito-borne zoonotic pathogen belonging to the california serogroup of bunyaviruses. although jcv is widely distributed throughout temperate north america, reports of human jcv infection in the united states are rare. this is the first report of human jcv infection detected in montana, one of only 15 cases reported in the united states since 2004, when jcv became reportable. on may 26, 2009, a man aged 51 years with no travel history outside of montana went t ... | 2011 | 21617630 |
| ecology of jamestown canyon virus (bunyaviridae: california serogroup) in coastal california. | this paper reports the first isolation of jamestown canyon (jc) virus from coastal california and the results of tests for antibody to jc virus in mammals living in coastal california. the virus isolation was made from a pool of 50 aedes dorsalis females collected as adults from morro bay, san luis obispo county, california. the virus isolate was identified by two-way plaque reduction-serum dilution neutralization tests done in vero cell cultures. sera from the mammals were tested for antibody t ... | 1996 | 8780458 |
| zoonotic infections among employees from great smoky mountains and rocky mountain national parks, 2008-2009. | u.s. national park service employees may have prolonged exposure to wildlife and arthropods, placing them at increased risk of infection with endemic zoonoses. to evaluate possible zoonotic risks present at both great smoky mountains (grsm) and rocky mountain (romo) national parks, we assessed park employees for baseline seroprevalence to specific zoonotic pathogens, followed by evaluation of incident infections over a 1-year study period. park personnel showed evidence of prior infection with a ... | 2012 | 22835153 |
| jamestown canyon virus disease in the united states-2000-2013. | jamestown canyon virus (jcv) is a mosquito-borne orthobunyavirus in the california serogroup that can cause an acute febrile illness, meningitis, or meningoencephalitis. we describe epidemiologic and clinical features for jcv disease cases occurring in the united states during 2000-2013. a case of jcv disease was defined as an acute illness in a person with laboratory evidence of a recent jcv infection. during 2000-2013, we identified 31 cases of jcv disease in residents of 13 states. the median ... | 2015 | 26033022 |
| serological survey for antibodies to mosquito-borne bunyaviruses among us national park service and us forest service employees. | serum samples from 295 employees of great smoky mountains national park (grsm), rocky mountain national park (romo), and grand teton national park with adjacent bridger-teton national forest (grte-btnf) were subjected to serological analysis for mosquito-borne bunyaviruses. the sera were analyzed for neutralizing antibodies against six orthobunyaviruses: la crosse virus (lacv), jamestown canyon virus (jcv), snowshoe hare virus (sshv), california encephalitis virus, and trivittatus virus (tvtv) b ... | 2016 | 26855300 |
| la crosse encephalitis virus infection in field-collected aedes albopictus, aedes japonicus, and aedes triseriatus in tennessee. | la crosse virus (lacv) is a mosquito-borne virus and a major cause of pediatric encephalitis in the usa. la crosse virus emerged in tennessee and other states in the appalachian region in 1997. we investigated lacv infection rates and seasonal abundances of the native mosquito vector, aedes triseriatus, and 2 recently introduced mosquito species, ae. albopictus and ae. japonicus, in an emerging disease focus in tennessee. mosquitoes were collected using multiple trapping methods specific for aed ... | 2015 | 26375904 |