factors affecting susceptibility of primary cultures of bovine kidney cells to infection with foot-and-mouth disease virus. 19714325246
[change in the resistance of mice to virus infection (foot-and-mouth-disease virus) after pretreatment with urethane]. 19714326010
[ph inactivation of the foot-and-mouth disease virus]. 19704325728
[the effect of deae-dextran on the infectiousness of ribonucleic acid preparations of foot-and-mouth disease virus in various host systems]. 19704325729
foot-and-mouth disease virus in cattle and pigs: use of polyethylene glycol or dextran for purifying 19s gamma-m immunoglobulin from sera. 19714325971
the growth and persistence of foot-and-mouth disease virus in the bovine mammary animals exposed to foot-and-mouth disease virus by indirect contact, virus was recovered from the blood, milk, pharynx, vagina and rectum for variable periods of time before clinical disease was apparent. virus instilled into the mammary gland multiplied rapidly and virus concentrations greater than 10(7) p.f.u./ml. were recorded within 8-32 hr., depending on the virus strain and dose inoculated. virus multiplication was accompanied by clinical signs of mastitis but the classical signs of foo ...19714326249
[identification of foot-and-mouth disease virus types]. 19714327832
[serologic and immunologic studies of the subtypes of foot-and-mouth disease virus. influence of booster vaccination]. 19714327833
presence and inactivation of foot-and-mouth disease virus in animal faeces. 19714326537
two-plaque-size variants of foot-and-mouth disease virus differing in neutralization by guinea-pig antisera. 19714326865
growth of the ib-rs-2 pig kidney cell line in suspension culture and its susceptibility to foot-and-mouth disease virus.the adaptation of the pig kidney cell line ib-rs-2, clone 60, to growth in suspension culture is described. when fully adapted, an approximate threefold increase in viable cells was obtained within 72 hr from initial cell concentrations of 5 x 10(5) per ml in culture volumes up to 1,500 ml. the monolayer cells (99th passage level) used to initiate the suspension cultures and the fully adapted suspension cells were shown to have an aneuploid chromosome karyotype, whereas earlier monolayer culture ...19714329431
detection of foot-and-mouth disease virus antibodies. ii. use of fractionated bovine antisera for improving the specificity of a "passive" hemagglutination test.because 7s immunoglobulin (ig) g antibodies of low type specificity were present in mixtures with highly specific 19s igm antibodies, many bovine antisera to foot-and-mouth disease virus (fmdv) type a(12), strain 119 cross-reacted with type o of fmdv and to some degree with type c in the passive hemagglutination (ha) test. after 19s igm antibodies were separated by density gradient centrifugation or precipitated with 4% (w/v) polyethylene glycol, the antigen could be determined with "block" ha t ...19714329433
foot-and-mouth disease virus carrier state in cells cultured from tissues of convalescent cattle. 19714329436
immune response to foot-and-mouth disease virus. 19714328704
number and molecular weights of foot-and-mouth disease virus capsid proteins and the effects of maleylation.evidence was obtained by gel electrophoresis that foot-and-mouth disease virus (fmdv) type a(12) protein migrates mainly in a zone corresponding to polypeptide(s) approximately 25,000 daltons in molecular weight. additional minor components were observed, four with molecular weights ranging from 10,000 to 22,500 daltons and one with a molecular weight of 37,500 daltons. the minor components comprised about 10% of the total protein and were present in variable amounts. the 75s empty capsids conta ...19714329399
methods for increasing the susceptibility of primary cultures of porcine kidney cells to infection with foot-and-mouth disease virus. 19714329641
[physical chemical measurement of 140s particles of the foot-and-mouth disease virus]. 19714329751
[identification of foot-and-mouth disease virus types]. 19714327831
diethylaminoethyl-dextran requirement for poly i:c-induced interferon effective against foot-and-mouth disease virus in vitro. 19714329635
relationship of the antigenic structure of foot-and-mouth disease virus to the process of infection. 19714331815
genetic characteristics of clones from individual cells multiply-infected with different strains of foot-and-mouth disease virus. 19714330350
adsorption characteristics of foot-and-mouth disease virus selected by adsorption with homogenized calf kidney. 19714329439
transfer of foot-and-mouth disease virus in the nose of man from infected to non-infected animals. 19714332392
detection and properties of a genomic masked viral particle consisting of foot-and-mouth disease virus nucleic acid in bovine enterovirus protein capsid. 19714332967
[interaction of the foot-and-mouth disease virus with cells]. 19714333885
passive hemagglutination-inhibition test for typing foot-and-mouth disease addition to currently used serological tests for the occurrence of foot-and-mouth disease virus (fmdv), a specific "passive" hemagglutination-inhibition (hai) test has been developed as a supplement. serial twofold dilutions of antiserum (0.05 ml) were mixed with 0.05 ml of a constant concentration of fmdv. after incubating for 30 min at 37 c, agglutinating antibodies were determined by adding 0.1 ml of 2.5% virus-sensitized erythrocytes. the minimum concentration of antiserum required to agg ...19724333898
polynucleotide sequence homologies among the rnas of foot-and-mouth disease virus types a, c and o. 19714331812
[method of identifying strains of foot-and-mouth disease virus]. 19714333883
[ontogenesis of foot-and-mouth disease virus (electron microscopic study)]. 19714334669
[foot-and-mouth disease virus in the cells of a hog kidney subculture]. 19714334670
[improving the typification of foot-and-mouth disease virus]. 19714334671
[antigenic properties of some strains of foot-and-mouth disease virus]. 19714334672
[carbohydrate metabolism in cells infected with foot-and-mouth disease virus]. 19714334673
heterogeneity of foot-and-mouth disease virus: further studies on plaque formation by two plaque-size variants.plaque production by a small-plaque (sp) and large-plaque (lp) variant of foot-and-mouth disease virus, type a, strain 119 (fmdv, a119), was influenced by a number of environmental factors. the sp variant produced plaques on cells of the ib-rs-2 cell line from swine kidney and to a lesser degree on primary cultures of swine kidney cells, but plaque formation was inhibited on primary cultures of bovine kidney (bk) cells unless diethylaminoethyl (deae) dextran was added to agar overlays. when deae ...19724334291
[isolation of foot-and-mouth disease virus from bovine semen]. 19714333355
[typing of the foot-and-mouth disease virus]. 19714334988
viscosity-density gradient for purification of foot-and-mouth disease virus. 19724335020
ribosomal factors effecting the stimulation of cell-free protein synthesis in the prescence of foot-and-mouth disease virus ribonucleic acid. 19714334521
further studies on the adsorption characteristics of foot-and-mouth disease virus residual to adsorption with homogenized calf kidney. 19714335926
neutralizing activity of sera from guinea-pigs inoculated with foot-and-mouth disease virus variants. 19724336056
spermidine stimulation of foot-and-mouth disease virus rna-dependent rna polymerase activity. 19724336494
comparative complement-fixation studies with subtype strains of foot-and-mouth disease virus.a comparison was made between a macrotechnique in tubes and a microtechnique in plastic plates for complement-fixation tests, using strains of three subtypes of the asia 1 type of foot-and-mouth disease (fmd) virus. the results obtained with these techniques were found to be comparable and delineated the antigenic relationships of the three strains employed. the microtechnique was considered to be both economical with reagents and capable of similar accuracy and reproducibility to that of the st ...19724335339
investigations of the attenuation induced in foot-and-mouth disease virus by a chemical mutagen. 19724336962
influence of divinyl ether-maleic anhydride (pyran) on foot-and-mouth disease virus infection: effect on adsorption and multiplication in mouse tissues. 19724336491
the influence of relative humidity on the aerosol stability of different strains of foot-and-mouth disease virus suspended in saliva. 19724337217
plaque production by carrier strains of foot-and-mouth disease virus in bhk-monolayers incubated at different temperatures. 19724336959
[influence of temperature on complement fixation activity of the foot-and-mouth disease virus]. 19714336298
experimental inoculation of sheep with foot-and-mouth disease virus. 19704337798
further studies on markers of foot-and-mouth disease virus. 19704337799
the growth of foot-and-mouth disease virus in organ cultures of bovine tissues. 19724337542
hybridization studies with subtypes and mutants of foot-and-mouth disease virus type o. 19724338334
further information on the survival of modified foot-and-mouth disease virus in cattle. 19704337797
the aerosol stability of a strain of foot-and-mouth disease virus and the effects on stability of precipitation with ammonium sulphate, methanol or polyethylene glycol. 19724337216
a model for foot-and-mouth disease virus. 19724338333
system for an early identification of foot-and-mouth disease virus strains. 19724339107
three variants of foot-and-mouth disease virus type o: exposure of cattle. 19724340054
tilting rack for cell cultures during replication of foot-and-mouth disease virus. 19724340057
[field observations concerning airborne transmission of foot-and-mouth disease virus]. 19724339496
three variants of foot-and-mouth disease virus type o: cell culture characteristics and antigenic differences. 19724340052
three variants of foot-and-mouth disease virus type o: agar gel diffusion reactions. 19724340053
mono- and divalent cationic parameters of foot-and-mouth disease virus replicase. 19724340565
chemical and physical properties of foot-and-mouth disease virus: a comparison with maus elberfeld virus. 19724341052
the effects of spraying on the amounts of airborne foot-and-mouth disease virus present in loose-boxes.the air of loose-boxes which had previously held pigs infected with foot-and-mouth disease was sampled for virus after various procedures. removal of infected pigs led to a 12- to 16-fold reduction in the amount of virus after 5 min. and a 400-fold reduction after 60 min. after heavy spraying (1.2 mm. of water in 5 min.) the amount of virus was reduced 500-fold compared to 30-fold after light spraying (0.20 mm. of water in 5 min.). the partition of infectivity associated with particle size was m ...19724342000
susceptibility of primary cell cultures to foot-and-mouth disease virus: effect of eagle's nonessential amino acids. 19724342333
screening of sera for antibodies to foot-and-mouth disease viral antigens by radial immunodiffusion.radial immunodiffusion procedures have been developed for testing bovine sera for the presence of antibody activity against three foot-and-mouth disease virus types and a virus infection-associated antigen. reactions with virus antigens were obtained as early as 4 days after infection, and the virus type causing the response was identified. the procedure had the advantages of great sensitivity for the detection of antibody and the ease with which antibodies to a variety of antigens could be dete ...19724344090
infection of some species of african wild life with foot-and-mouth disease virus. 19724346158
stabilizing the immunizing antigen of foot-and-mouth disease virus by fixation with formaldehyde. 19724344146
[presence of an rna dependent dna polymerase enzyme in the foot-and-mouth disease virus]. 19724344208
the differentiation of foot-and-mouth disease virus subtypes by means of the passive immuno-hemolysis test. 19724346674
[effects of gamma radiation on the infectivity, antigenicity and immunogenicity of the foot-and-mouth disease virus]. 19724345590
activity of some actinomycetes and high plants against foot and mouth disease virus. 19724346472
the effects of various protecting agents on the inactivation of foot-and-mouth disease virus in aerosols and during freeze-drying. 19724346651
foot-and-mouth disease virus: selection by homogenized calf kidney adsorption and cell culture passage.foot-and-mouth disease virus was passaged 20 times by alternately adsorbing the virus with homogenized calf kidney and propagating the adsorption-resistant fraction of virus in cell cultures. passage of the virus was accompanied by a marked decrease in pathogenicity for 35-day-old mice and a reduction in its ability to adsorb to homogenized kidney from such mice. adsorption by homogenized calf kidney and infant mouse kidney also decreased with passage, but pathogenicity for cattle and infant mic ...19724348077
[identification of foot-and-mouth disease virus types]. 19724349543
enhancement, by two carboxylic acid interferon inducers of resistance stimulated in mice by foot-and-mouth disease vaccine.simultaneous injection of divinyl ether-maleic amhydride (dve/ma) or itaconic-acrylic acid and foot-and-mouth disease virus vaccine enhanced the survival of infant mice to subsequent injections of virus. this enhanced resistance was obtained even with doses of interferon inducers which, when administered alone, failed to protect the mice. there was some increase in serum-neutralizing antibody in mice 7 days after injection of dve/ma and vaccine, as compared with mice given vaccine alone, but the ...19734348964
[antigenic properties of strains of a 22 foot-and-mouth disease virus isolated in epizootic conditions]. 19724350008
[changes in antigen properties of foot-and-mouth disease virus during several passages]. 19724350009
[foot-and-mouth disease virus titration using the color-test technic on ibr's2 line cells]. 19724350010
[identification of foot-and-mouth disease virus types]. 19724349542
isolation and partial characterization of temperature-sensitive mutants of the sat-1 strain of foot-and-mouth disease virus. 19734348741
isolation of the structural polypeptides of foot-and-mouth disease virus and analysis of their c-terminal sequences. 19734350226
[the use of crcl 3 for coupling of foot-and-mouth disease virus to erythrocytes, and the ability of these sensitized erythrocytes to react in passive hemagglutination (pha) and passive immunohemolysis (pih)]. 19724352304
[comparison between dna synthesized by enzyme fractions extracted from foot-and-mouth disease virus and from atypical rat epithelioma cells]. 19734351685
haemagglutination by type sat 2 foot-and-mouth disease viruses. 19734353214
[uv-irradiation of the foot-and-mouth disease virus. 1. inactivation in relation to the concentration and purity of the virus and quantal yield at 2537 angstrom]. 19724353314
[identification of epizootic strains of foot-and-mouth disease virus in the u.s.s.r]. 19724350007
evidence for a group protein in foot-and-mouth disease virus particles. 19734353213
[neutralization of the infective power of the foot-and-mouth disease virus in cell culture by using serums from pigs immunized with a purified viral protein]. 19734353472
inhibitory effect of n-phenyl-n'-aryl or alkylthiourea derivatives on the multiplication of some picornaviruses (coxsackie b 1, echo 19, and foot-and-mouth disease virus) in cell cultures. 19724352303
[immune ascites fluids for typing the foot-and-mouth disease virus]. 19724353657
[detection of the foot-and-mouth disease virus in animal slaughter products]. 19724353658
[inactivation of the foot-and-mouth disease virus by methylglyoxal]. 19734353689
[protein and ribonucleic acid biosynthesis in the cells in the replication of the foot-and-mouth disease virus]. 19734353690
[antigenic properties of the foot-and-mouth disease virus concentrated by polyethylene glycol]. 19734353691
[passive hemagglutination reaction for the identification of the foot-and-mouth disease virus]. 19724353655
[specific cell resistance induced by foot-and-mouth disease virus]. 19724353656
neutralizing antibody response in bovine serum and nasal and salivary secretions after immunization with live or inactivated food-and-mouth disease virus.calves develop nasal and salivary neutralizing antibodies against foot-and-mouth disease virus after nasal inoculation with live virus. nasal and salivary antibody was not detected after exposure to inactive virus. serum antibodies were induced by live and inactive virus given subcutaneously. passively acquired antibodies were detected as long as 7 months after birth.19734353542
vesicular lesions produced in guinea pigs by a staphylococcus aureus strain.a bacterium isolated from vesicular lesions on foot pads of guinea pigs reproduced lesions similar to those seen in experimental infections of guinea pigs with foot-and-mouth disease virus. (fmdv). these bacterial lesions were produced with an inactivated fmdv suspension. identification as staphylococcus aureus was determined by growth characteristics on nutrient and blood agar, gram staining, fermentation of mannitol and coagulase positive reactions. in addition, the organism was sensitive to c ...19734355472
[viability of the foot-and-mouth disease virus in the body of wild birds]. 19724354912
comparison of the aerosol stabilities of foot-and-mouth disease virus suspended in cell culture fluid or natural fluids. 19734355328
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