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1.
Rev Argent Microbiol ; 23(1): 22-5, 1991.
Artigo em Espanhol | MEDLINE | ID: mdl-1667697

RESUMO

Response against foot-and-mouth disease virus 01 Campos on vaccinated female mice and suckling litter was estimated. Vaccine doses ranged between 0.05 and 30 micrograms of virus. The lower dose protected 39.5% of suckling litter whereas 100% protection was achieved using the higher doses. Serum neutralization indexes in females, at 45 days post vaccination, ranged from 3.60 to 4.86 for 0.05 microgram to 0.10 microgram and 4.86 to 5.50 for the high doses. Although the doses were excessively high (eq. 1 mu/g average live weight) and (OH)3Al was used as adjuvant, no adverse effect on the immune system was detected in any of the vaccinated animals.


Assuntos
Anticorpos Antivirais/biossíntese , Aphthovirus/imunologia , Vacinas Virais/imunologia , Animais , Animais Lactentes , Relação Dose-Resposta Imunológica , Feminino , Masculino , Camundongos , Testes de Neutralização , Vacinação
2.
Rev Argent Microbiol ; 20(2): 69-75, 1988.
Artigo em Espanhol | MEDLINE | ID: mdl-2845477

RESUMO

Foot-and-Mouth disease virus (FMDV), contains a positive single-stranded RNA enclosed in a protein capsid. Previous studies have shown that a synthetic peptide located at the carboxyterminal end of VP1 of FMDV strain O1 Kaufbeuren (O1K) at the amino acid positions 144-159, and coupled to KLH was able to elicit high titers of neutralizing antibodies in guinea pigs and protected them against challenge with the homologous virus (8, 15). FMDV strain O1 Campos (O1 Ca) has a similar amino acid sequence to O1K, differing in amino acid 144 (leucin instead valine). We report that the O1K synthetic peptide 144-159 protects adult mice against challenge with FMDV O1Ca when the peptide is coupled to KLH with glutaraldehyde as coupling agent (Table 2) whereas protection is very low when other carrier proteins are used.


Assuntos
Anticorpos Antivirais/imunologia , Aphthovirus/imunologia , Oligopeptídeos/imunologia , Vacinas Sintéticas/imunologia , Vacinas/imunologia , Vacinas Virais/imunologia , Animais , Hemocianinas/imunologia , Testes de Neutralização , Ratos , Especificidade da Espécie , Relação Estrutura-Atividade , Proteínas Virais/imunologia , Proteínas Estruturais Virais
3.
Rev Argent Microbiol ; 14(1): 31-6, 1982.
Artigo em Espanhol | MEDLINE | ID: mdl-6100998

RESUMO

The thermal stability, density gradient and morphological features of a recently isolated L-114 strain of infectious bovine rhinotracheitis virus were determined. Morphology studies showed an enveloped virus with 200 nm of total diameter, a core diameter of 90 nm and an icosaedral-type structure; purified preparations contained both complete and empty viral particles. More than 90% of the infectivity was lost after 15 hours at 37 degrees C; at 56 degrees C, inactivation was much faster, with a 3 log titer reduction, in 24 minutes. Density gradient studies in cesium chloride, carried out with virus concentrated on sucrose gradient, gave an estimated density of 1.25 g/ml for the purified virus, which fits with light herpesviruses.


Assuntos
Herpesvirus Bovino 1/ultraestrutura , Centrifugação com Gradiente de Concentração , Fenômenos Químicos , Físico-Química , Temperatura
7.
Rev. argent. microbiol ; 20(2): 69-15, 1988. Tab, ilus
Artigo em Espanhol | BINACIS | ID: bin-28894

RESUMO

Un hexadecapéptido correspondiente a la secuencia 144-159 de la proteína estructural VP1 del virus de la fiebre aftosa (CFA), cepa O1K, fue sintetizado por métodos químicos. El mismo, acoplado covalentemente a distintas proteínas portadoras, demostró su capacidad de inducir anticuerpos neutralizantes del VFA cepa O1 Campos (O1Ca) en ratones adultos. La protección fue del 100% cuando se lo acopló a la hemocianina de un molusco (KLH) y fue inoculado en cantidad de 60 microng, dividida en dos dosis y adyuvada con mezcla oleosa. Las proteínas utilizadas como portadoras: albúmina bovina, purificado proteico de Mycobacterium (PPD), gliadina y células de Brocelas produjeron una respuesta inmune menor que la KLH (AU)


Assuntos
Camundongos , Animais , Aphthovirus/imunologia , Peptídeos/biossíntese , Ensaio de Imunoadsorção Enzimática , Ratos Endogâmicos F344
8.
Rev. argent. microbiol ; Rev. argent. microbiol;20(2): 69-15, 1988. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-74844

RESUMO

Un hexadecapéptido correspondiente a la secuencia 144-159 de la proteína estructural VP1 del virus de la fiebre aftosa (CFA), cepa O1K, fue sintetizado por métodos químicos. El mismo, acoplado covalentemente a distintas proteínas portadoras, demostró su capacidad de inducir anticuerpos neutralizantes del VFA cepa O1 Campos (O1Ca) en ratones adultos. La protección fue del 100% cuando se lo acopló a la hemocianina de un molusco (KLH) y fue inoculado en cantidad de 60 microng, dividida en dos dosis y adyuvada con mezcla oleosa. Las proteínas utilizadas como portadoras: albúmina bovina, purificado proteico de Mycobacterium (PPD), gliadina y células de Brocelas produjeron una respuesta inmune menor que la KLH


Assuntos
Camundongos , Animais , Aphthovirus/imunologia , Peptídeos/biossíntese , Ensaio de Imunoadsorção Enzimática
9.
Rev. argent. microbiol ; Rev. argent. microbiol;20(2): 69-75, 1988 Apr-Jun.
Artigo em Espanhol | BINACIS | ID: bin-52387

RESUMO

Foot-and-Mouth disease virus (FMDV), contains a positive single-stranded RNA enclosed in a protein capsid. Previous studies have shown that a synthetic peptide located at the carboxyterminal end of VP1 of FMDV strain O1 Kaufbeuren (O1K) at the amino acid positions 144-159, and coupled to KLH was able to elicit high titers of neutralizing antibodies in guinea pigs and protected them against challenge with the homologous virus (8, 15). FMDV strain O1 Campos (O1 Ca) has a similar amino acid sequence to O1K, differing in amino acid 144 (leucin instead valine). We report that the O1K synthetic peptide 144-159 protects adult mice against challenge with FMDV O1Ca when the peptide is coupled to KLH with glutaraldehyde as coupling agent (Table 2) whereas protection is very low when other carrier proteins are used.

10.
Rev. argent. microbiol ; Rev. argent. microbiol;23(1): 22-5, 1991 Jan-Feb.
Artigo em Espanhol | BINACIS | ID: bin-51362

RESUMO

Response against foot-and-mouth disease virus 01 Campos on vaccinated female mice and suckling litter was estimated. Vaccine doses ranged between 0.05 and 30 micrograms of virus. The lower dose protected 39.5


of suckling litter whereas 100


protection was achieved using the higher doses. Serum neutralization indexes in females, at 45 days post vaccination, ranged from 3.60 to 4.86 for 0.05 microgram to 0.10 microgram and 4.86 to 5.50 for the high doses. Although the doses were excessively high (eq. 1 mu/g average live weight) and (OH)3Al was used as adjuvant, no adverse effect on the immune system was detected in any of the vaccinated animals.

11.
Rev. argent. microbiol ; Rev. argent. microbiol;14(1): 31-6, 1982.
Artigo em Espanhol | LILACS | ID: lil-10295

RESUMO

Se determino la estabilidad termica, densidad de flotacion y morfologia de la cepa L-114 de virus de la rinotraqueitis infecciosa bovina, aislada recientemente en el pais. La morfologia correspondio a un virus con envoltura, de 200 mm de diametro total y 90 mm de diametro del "core". La estructura de este ultimo fue de tipo icosaedrica, observandose particulas vacias y completas en la preparaciones purificadas de virus. A 37o C, cepa L-114 perdio mas del 90% de su infectividad en 15 hs. y a 56o C se inactivo muy rapidamente, perdiendo 3 log en 24 minutos. La densidad de flotacion en cloruro de cesio, luego de su concentracion por sedimentacion a traves de sacarosa al 47% (p/v), indica que el virus purificado tiene una densidad estimada de 1,25 g/ml, correspondiente a los virus herpes denominados livianos


Assuntos
Herpesvirus Bovino 1 , Microscopia Eletrônica
12.
Rev. argent. microbiol ; Rev. argent. microbiol;14(1): 31-6, 1982 Jan-Mar.
Artigo em Espanhol | BINACIS | ID: bin-50041

RESUMO

The thermal stability, density gradient and morphological features of a recently isolated L-114 strain of infectious bovine rhinotracheitis virus were determined. Morphology studies showed an enveloped virus with 200 nm of total diameter, a core diameter of 90 nm and an icosaedral-type structure; purified preparations contained both complete and empty viral particles. More than 90


of the infectivity was lost after 15 hours at 37 degrees C; at 56 degrees C, inactivation was much faster, with a 3 log titer reduction, in 24 minutes. Density gradient studies in cesium chloride, carried out with virus concentrated on sucrose gradient, gave an estimated density of 1.25 g/ml for the purified virus, which fits with light herpesviruses.

13.
Rev. argent. microbiol ; 14(1): 31-6, 1982.
Artigo em Espanhol | BINACIS | ID: bin-35715

RESUMO

Se determino la estabilidad termica, densidad de flotacion y morfologia de la cepa L-114 de virus de la rinotraqueitis infecciosa bovina, aislada recientemente en el pais. La morfologia correspondio a un virus con envoltura, de 200 mm de diametro total y 90 mm de diametro del "core". La estructura de este ultimo fue de tipo icosaedrica, observandose particulas vacias y completas en la preparaciones purificadas de virus. A 37o C, cepa L-114 perdio mas del 90% de su infectividad en 15 hs. y a 56o C se inactivo muy rapidamente, perdiendo 3 log en 24 minutos. La densidad de flotacion en cloruro de cesio, luego de su concentracion por sedimentacion a traves de sacarosa al 47% (p/v), indica que el virus purificado tiene una densidad estimada de 1,25 g/ml, correspondiente a los virus herpes denominados livianos


Assuntos
Herpesvirus Bovino 1 , Microscopia Eletrônica
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