Resumos
Em prosseguimento a trabalhos anteriores referentes à ação dos raios X e radium sôbre os vírus, especialmente o da gripe, verificaram os A.A. que o radium exerce, em certas doses, ação excitante sôbre o vírus da poliomielite, como acontecera com as doses fracas de raios X sôbre o vírus da gripe. As experiências que levaram a essas conclusões foram feitas ocm a aplicação de 4 mg de radim contidos em 4 tubinhos verificando-se que, após 127 e 159 dias o vírus testemunho tinha perdido tôda a atividade, que antes já se mostrara diminuida, ao passo que o submetido à ação do radium mostrou-se sempre mais ativo, assim se conservando integralmente após aquêlo prazo. Na prática, essa observação poderá conduzir a um meio destinado a aumentar a virulência do referido vírus.
The authors refered the previous publication of the results obtained when the influenza virus in saline suspensios of mice lungs was irradiated with small doses of X rays. The irradiated vírus was more virulent for mice than the control one. The effect of the exposition to 1 mg of radium was not significant. In the present paper the authors refered the experiments made with the poliomyelits virus, MEF1 strain, after exposition to 1 needle of 1 mg of radium and to 4 tubes of 1 mg of radium. The virus suspension was put into the Carrel flask in a fluid layer of 0,1 cm. The titulations of the irradiated virus suspension activity were made in the first case (exposition to the radium needle) after 7, 13, 20 and 30 days and, in other experiments, after 90, 120, 150 and 182 days of exposition. The results were not statistically significant. In the second case (exposition to the 4 tubes of 1 mg of radium each), after 60 and 90 days of exposition showed more activity than was shown in the control. After 127 and 139 days the control suspension completely lost the activity and the irradiated virus maintained the same infective title. In conclusion, the poliomyelitis virus, MEF1 strain, after radium exposition, in the described experimental conditions, showed higher infective title than the control. This property can be used to increase the virulence of that virus and, possibly of other viruses.
Ação do radium sôbre o vírus da poliomielite
J. Guilherme Lacorte1
Estácio Monteiro1
J. Carvalho Loures1
Instituto Oswaldo Cruz, Rio de Janeiro, Brasil
Em prosseguimento a trabalhos anteriores referentes à ação dos raios X e radium sôbre os vírus, especialmente o da gripe, verificaram os A.A. que o radium exerce, em certas doses, ação excitante sôbre o vírus da poliomielite, como acontecera com as doses fracas de raios X sôbre o vírus da gripe. As experiências que levaram a essas conclusões foram feitas ocm a aplicação de 4 mg de radim contidos em 4 tubinhos verificando-se que, após 127 e 159 dias o vírus testemunho tinha perdido tôda a atividade, que antes já se mostrara diminuida, ao passo que o submetido à ação do radium mostrou-se sempre mais ativo, assim se conservando integralmente após aquêlo prazo. Na prática, essa observação poderá conduzir a um meio destinado a aumentar a virulência do referido vírus.
The authors refered the previous publication of the results obtained when the influenza virus in saline suspensios of mice lungs was irradiated with small doses of X rays. The irradiated vírus was more virulent for mice than the control one. The effect of the exposition to 1 mg of radium was not significant. In the present paper the authors refered the experiments made with the poliomyelits virus, MEF1 strain, after exposition to 1 needle of 1 mg of radium and to 4 tubes of 1 mg of radium. The virus suspension was put into the Carrel flask in a fluid layer of 0,1 cm. The titulations of the irradiated virus suspension activity were made in the first case (exposition to the radium needle) after 7, 13, 20 and 30 days and, in other experiments, after 90, 120, 150 and 182 days of exposition. The results were not statistically significant. In the second case (exposition to the 4 tubes of 1 mg of radium each), after 60 and 90 days of exposition showed more activity than was shown in the control. After 127 and 139 days the control suspension completely lost the activity and the irradiated virus maintained the same infective title. In conclusion, the poliomyelitis virus, MEF1 strain, after radium exposition, in the described experimental conditions, showed higher infective title than the control. This property can be used to increase the virulence of that virus and, possibly of other viruses.
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Datas de Publicação
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Publicação nesta coleção
02 Set 2009 -
Data do Fascículo
Out 1959
