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demonstration of western equine encephalitis virus in mouse brain by immunofluorescence. 19704107096
pathological changes in brain and other target organs of infant and weanling mice after infection with non-neuroadapted western equine encephalitis virus.infant and weanling mice infected experimentally with non-neuroadapted western equine encephalitis virus exhibited a differing spectrum of target-organ pathology as well as a different clinical response. the infant mice sickened and died within 48 hr. pathological changes in this group were largely limited to such mesodermally derived tissues as muscle, cartilage, and bone marrow elements. the central nervous system was uninvolved, as were heart, lung, liver, and other body organs. the young adu ...197016557874
comparative studies on nucleic acid synthesis and virus-induced rna polymerase activity in mammalian cells infected with certain arboviruses. 19714107475
antibody against western equine encephalitis virus occurring in the serum of garter snakes (colubridae: thamnophis) in saskatchewan.a study was made of feeding and temperature as factors affecting the appearance of western equine encephalitis (wee) virus-neutralizing serum (vns) antibodies in the serum of garter snakes (thamnophis spp). eighty snakes were collected in the field, held in captivity under controlled conditions, and bled at frequent intervals. the sera were examined by standard procedures for the presence of wee vns-antibodies. it was found that snakes held between 10-28 degrees c showed conversion and intermitt ...19714251413
inhibition of interferon synthesis in phospholipase c treated primary chick embryo cells. 19714327713
[chronic infection of human embryo diploid cells caused by japanese encephalitis virus]. 19714332919
serologic evidence of arbovirus activity in a moose population in alberta. 19714361127
inhibition of virus multiplication by some derivatives of pyridine- and pyrazinecarboxylic acid. 19714398086
inhibition of virus multiplication by selected isothiocyanates. 19714398087
arboviruses isolated from mosquitoes collected in southeastern iowa in 1966. 19714398432
on the presence of viruses of the american equine encephalomyelitis in central europe. review. 19714399101
cytoplasmic localization of ribonucleic acid synthesis induced in the cells infected with some group a arboviruses. 19714997624
mechanism of enhancement of newcastle disease virus growth in cultured cells by co-infecting hog cholera virus. 19715000803
immunosuppression: a means to assess the role of the immune response in acute virus infections. 19715001450
nonspecific arbovirus hemogglutinin inhibitors in turtle sera. 19715574411
[detection of hemagglutination-inhibiting antibodies to arboviruses in sera of young individuals in the federal republic of germany and in the republic of togo (west africa)]. 19714403535
interferon assays and quantitative virus determinations in a fatal infection in man with western equine encephalomyelitis virus. 19715093674
inactivated western equine encephalomyelitis vaccine propagated in chick embryo cell culture. clinical and serological evaluation in man. 19715105896
neurologic, intellectual, and psychologic sequelae following western encephalitis. a follow-up study of 35 cases. 19715106260
trinity river serologic survey. a survey of residents of communities along the course of the trinity river between houston and dallas, texas, for antibodies to the viruses of st. louis encephalitis, western equine encephalitis and california encephalitis. 19715120543
relationship between neurovirulence and temperature sensitivity of an attenuated western equine encephalitis virus. 19715137591
cross-protection in hamsters immunized with group a arbovirus vaccines.cross-protection between venezuelan, eastern, and western equine encephalomyelitis (vee, eee, wee) viruses was studied in the hamster by using challenge responses and neutralizing antibody titers as indexes of protection. formalin-inactivated vaccines induced only homologous protection regardless of the sequence of vaccination or the combination of vaccines employed. use of attenuated vee vaccine, singly, produced absolute homologous protection as well as 37 and 59% protection against wee and ee ...19715154876
wild birds as eastern (eee) and western (wee) equine encephalitis sentinels. 19715156487
[cultivation of various arboviruses in new transplantable lines of mouse fibroblasts]. 19715168877
absence of an all-or-none type of complement requirement in early neutralizing antibody against western equine encephalitis virus. 19715313614
the influence of cell-free extracts from ehrlich ascitic carcinoma and rous sarcoma on the action of antiviral inhibitors. 19724404902
experimental infection of bobwhite quail (colinus virginianus) with western equine encephalitis (wee) virus. 19725007901
the pathogenesis of western equine encephalitis virus (w.e.e.) in adult hamsters with special reference to the long and short term effects on the c.n.s. of the attenuated clone 15 variant. 19725014245
arboviruses west and north. 19725034693
arbovirus infections in man in british columbia.during the summer of 1971, the first laboratory-proved cases of acute encephalitis in man due to any of the known arboviruses occurred in the south-central region of british columbia. five human cases of encephalitis with two deaths were diagnosed; three of these patients, including one of the fatalities, were proven in the laboratory to have contracted western equine encephalitis.during 1968 and 1969, a human serum survey undertaken in approximately 2000 life-long residents of the province disc ...19725034698
recurrent st. louis encephalitis infection in residents of a flood plain of the trinity river, roosevelt heights (dallas, texas). 19725048980
mouse potency assay for western equine encephalomyelitis vaccines.a potency assay for western equine encephalomyelitis vaccine was developed which utilized mice as the test animal instead of guinea pigs or hamsters. by immunizing several groups of mice with dilutions of the vaccine and challenging them intracerebrally with virulent virus, it was possible to determine mathematically a dose of vaccine capable of protecting 50% of the animals (ed(50)). when log dilutions of virulent virus were used to challenge mice which were immunized with dilutions of the vacc ...19725059614
inhibitors of western and venezuelan equine encephalitis viruses in cattle sera from hawaii. 19725061277
radioimmune precipitation of group a arboviruses. 19725066343
virulence of a temperature-sensitive mutant of western equine encephalitis virus. 19725083407
[combined use of interferon and various styrylquinolines in cell cultures and experimental arbovirus infections]. 19725086860
early protection in hamsters immunized with attenuated venezuelan equine encephalomyelitis vaccine.the rapid onset and persistence of homologous and heterologous protection induced by attenuated venezuelan equine encephalomyelitis (vee) vaccine (tc-83) were studied in the hamster, by using challenge response as the index of protection. at 8 hr postvaccination with 10(3) median immunizing doses of tc-83 vaccine, 15 to 20% of animals were protected against challenge with vee virus as well as eastern and western equine encephalomyelitis viruses. the percentage of protection increased with time p ...19725086903
isolation of tick-borne encephalitis virus from the brain of a sick dog in switzerland. 19724400683
agents encountered during arboviral ecological studies: tampa bay area, florida, 1963 to 1970. 19724400812
studies on arbovirus haemagglutinin: differential inhibition of haemagglutinin formation by 6-azauridine and uridine kinase-containing cell-free extract. 19724402254
ecology of arboviruses in a maryland freshwater swamp. i. population dynamics and habitat distribution of potential mosquito vectors. 19724403121
ecology of arboviruses in a maryland freshwater swamp. 3. vertebrate hosts. 19724403123
susceptibility of the mongolian gerbil (meriones unguiculatus) to western equine encephalitis. 19724556102
elimination of repeated clot formation in mouse ascitic fluid containing arbovirus antibodies.repeated clot formation in mouse ascitic fluids containing antiviral antibody was eliminated by acid precipitation of the fibrinogen.19724672320
specific membranous structures associated with the replication of group a arboviruses.intracytoplasmic membranous structures of a unique type were associated with the replication of three group a arboviruses: semliki forest virus (sfv), sindbis virus, or western equine encephalomyelitis virus. the structures, referred to as type 1 cytopathic vacuoles (cpv-1), were membrane-limited and characteristically lined by regular membranous spherules measuring 50 nm in diameter. the membranous spherules typically contained a fine central density, but were neither virus cores nor virions. d ...19724672392
[low temperature thresholds of reproduction of group a arboviruses in tissue culture]. 19724672889
structural and immunologic characteristics of subviral components of sindbis, eastern equine and western equine encephalitis viruses. 19724212354
further characterization of an attenuated western equine encephalitis virus: search for in vitro markers. 19724336497
attempted application of avian viral antibody test for detection of other microbial infections. 19724342893
effects of arsenicals on viral infections in mice. 19724343075
some aspects of diagnosis of western equine encephalitis in chicks and mice by immunofluorescence. 19724259934
laboratory studies on the transmission of western equine encephalitis virus by saskatchewan mosquitoes. i. culex tarsalis.a saskatchewan strain of the mosquito culex tarsalis, transmitted a local strain of western equine encephalitis virus from chick to chick, between four and 44 days after an infective blood meal. at incubation temperatures of 69 and 75 degrees f, 120 transmissions occurred out of a possible 141, and all but seven of these were by single infected mosquitoes. at 75 degrees f virus titers in individual mosquitoes were more uniform and transmission was more efficient, than at 69 degrees f, although i ...19724259935
[detection of antibodies to a series of arboviruses of groups a, b and bunyamwera on the territory of the georgian ssr]. 19724260426
[use of ultrasound for increasing the activity of arbovirus antigens in serological reactions in vitro]. 19734203622
gamma ray-induced small plaque mutants of western equine encephalitis virus.small plaque mutants of western equine encephalitis virus were obtained from the surviving fractions of wild-type virus which was irradiated with gamma rays. the frequency with which small plaque mutants appeared in the surviving fraction increased with the radiation dose. these mutants were not more resistant to radiation than wild-type virus. the growth rate of a mutant, s127, was lower than that of wild-type. clonally purified mutant virions presented two peaks in a velocity sedimentation pro ...19734128384
antigenic components of group a arbovirus virions.three group a arboviruses, sindbis (sin), western (wee) and eastern equine encephalitis (eee), were selectively degraded with a nonionic detergent to yield a core particle and a soluble envelope component. antigenic analysis by using radioimmune precipitation techniques revealed marked antigenic similarity among the core particles of the three viruses. the soluble envelope component exhibited antigenic specificity similar to that of intact virions. a close relationship between sin and wee envelo ...19734128825
[specific precipitinogen activity of certain arboviruses and the factors determining its manifestation]. 19734132142
uridine kinase level in cells infected with western equine encephalomyelitis, vesicular stomatitis, pseudorabies and polyoma viruses. 19734144274
arboviruses in hungary. 19734145388
isolation of st. louis encephalitis and cache valley viruses from saskatchewan mosquitoes. 19734147200
interferon in young and aged chick embryo cell cultures infected with herpes simplex and pseudorabies viruses. 19734150028
antiviral activity of isoprinosine in vitro and in vivo. 19734350802
california arbovirus (la crosse) infections. i. clinical and laboratory findings in 66 children with meningoencephalitis. 19734355363
[role of cellular repair mechanisms in the realization of spontaneous and induced mutations in vertebrate viruses]. 19734356404
arbovirus serology in north dakota mule and white-tailed deer. 19734361503
viral teratology. 19734369438
considerations on the ecology of several arboviruses in eastern long island. 19734684881
house sparrows, passer domesticus (l.), as hosts of arboviruses in hale county, texas. i. field studies, 1965-1969. 19734688420
house sparrows, passer domesticus (l.), as hosts of arboviruses in hale county, texas. ii. laboratory studies with western equine encephalitis virus. 19734688421
ecology of western encephalitis virus. 19734692002
surveillance of arboviral encephalitis in the united states, 1955-1971. 19734692993
host defenses during primary venezuelan equine encephalomyelitis virus infection in mice. ii. in vitro methods for the measurement and qualitation of the immune response. 19734697832
"zaliv terpeniya" virus, a new uukuniemi group arbovirus isolated from ixodes (ceratixodes) putus pick.-camb. 1878 on tyuleniy island (sakhalin region) and commodore islands (kamchatsk region). 19734727778
california encephalitis studies in iowa during 1969, 1970 and 1971. 19734735659
possible evidence for interference with venezuelan equine encephalitis virus vaccination of equines by pre-existing antibody to eastern or western equine encephalitis virus, or both.during 1971, an epizootic of venezuelan equine encephalitis (vee) reached the united states. laboratory tests were performed on a large number of sick, healthy, unvaccinated, and vaccinated horses. neutralization (n) tests in cell cultures revealed that 153 of 193 (79.3%) equines outside the state of texas and 175 of 204 (85.8%) within texas (82.6% overall) had detectable n antibody to vee virus a week or more after vaccination. twenty-six of 40 (65%) non-texas equines and 18 of 29 (62%) texas e ...19734751797
serologic examination of some domestic animals from south moravia on the presence of antibodies to selected arboviruses of the a, b, california and bunyamwera groups. 19734777760
[a cryomethod of concentrating antibodies]. 19734789252
[study of the multiplication of tiuleniĭ, sakhalin and baku arboviruses in cell cultures]. 19734789979
[nonspecific resistance of tissue cultures, grown in a medium with serum lipid inhibitors, to arboviruses]. 19734797701
clinical studies of an attenuated virus cell culture venezuelan equine encephalomyelitis vaccine. 19734803525
a comparison of clinical manifestations and pathology of the equine encephalidites: vee, wee, eee. 19734534742
japanese quail embryo cells as a host of group a arboviruses. 19734541936
immune response of horses after simultaneous or sequential vaccination against eastern, western, and venezuelan equine encephalomyelitis. 19744422323
experimental infection with western equine encephalomyelitis virus in wild rodents indigenous to kern county, california.six species of rodents from kern county, california, were inoculated subcutaneously with western equine encephalomyelitis (wee) virus to determine their susceptibility to infection and their potential as natural hosts. ammospermophilus nelsoni, citellus beecheyi, dipodomys heermanni, dipodomys nitratoides, peromyscus maniculatus, and sciurus griseus were readily infected. infection was usually fatal in dipodomys species, c. beecheyi, and s. griseus, but was clinically inapparent in other species ...19744426699
neutralizing antibody against akabane virus in precolostral sera from calves with congenital arthrogryposis-hydranencephaly syndrome. 19744451432
proceedings: mathematical modeling of a virus vector: culex tarsalis. 19744824238
comparative electrophoretic studies on the structural proteins of selected group a arboviruses. 19744841596
rapid identification of western equine encephalomyelitis virus. 19744856671
enhanced detection of western equine encephalitis virus plaque variants in crowded cultures and plaque progeny--potential use in genetic studies.enhanced detection of large-plaque variants of western equine encephalitis virus in the presence of large numbers of small-plaque western encephalitis virus was achieved by using higher bicarbonate concentrations in the agar-overlay medium and increasing concentrations of co(2) in an enclosed environment during the time plaques were developed with neutral red. by this technique we were able to detect large-plaque mutants in cloned small-plaque suspensions for the first time and to show an increa ...19744858504
virus inhibitory activity of some pyrimidine derivatives and trimethinium salts in tissue culture. 19744859585
inhibitors against rabies virus present in normal rabbit sera. 19744370108
[mechanism of viral variability. spontaneous mutation process in western equine encephalomyelitis virus in cells with active and defective repair systems]. 19744374814
[mechanism of viral variability. methylmethanesulfonate-induced mutation process in western equine encephalomyelitis virus in cells with active and defective repair systems]. 19744374816
use of frozen chick and duck embryo cells for plaque assays of arboviruses and rickettsiae. 19744376554
lead aggravates viral disease and represses the antiviral activity of interferon inducers.lead acetate was administered continuously in the drinking water to cd-1 male mice beginning at 4 weeks of age. an ld(10-20) of the lytic viruses or 300 plaque-forming units of rlv was inoculated intrapertioneally at 6 weeks of age. lead increased the response of the mice to all classes of viruses against which it was tested: an rna picornavirus-encephalomyocarditis (emcv), a dna herpesvirus-pseudoribies, an rna leukemia-virus-rauscher leukemia (rlv), an rna arbovirus b-st. louis encephalitis, a ...19744364644
[role of birds in importing and preserving arboviruses (a review of the literature)]. 19744213786
[interaction of vertebrate viruses and insect nuclear polyhedrosis viruses with transplantable diploid embryonal drosophila cells].when the drosophila cells were infected with the mixo- and arboviruses, in case of influenza a/wsn virus a rise in the titre and slight cytopathogenic effect with the subsequent decrease in the titre was observed. since the decrease in the virus titer was not observed when actinomycin d was added, it was supposed that interferonlike inhibitor may be produced by the infected cells. vacuolization and increase in the size of the infected cells were caused by all the nuclear polyhedrosis viruses tes ...19744219669
biological characteristics and viral susceptibility of a rat embryonic skin cell line (resi). 19744358594
relationship of density of culiseta melanura mosquitoes to infection of wild birds with eastern and western equine encephalitis viruses. 19744153042
problems of insecticide resistance. 19744156106
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