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Investigation of the response to the enterobacterial common antigen after typhoid vaccination

Abstracts

Antibodies against the Salmonella typhi enterobacterial common antigen (ECA) and the O and H antigens were investigated in sera from healthy male subjects who had been previously vaccinated with the typhoid vaccine. No serological response to ECA was observed. Sera from subjects not previously vaccinated presented titers of ECA hemagglutinins which quantitatively were related to the presence ofH titers, but not to O agglutinins but with no statistical significance. The results are discussed in relation to the possible protective immunological mechanisms in typhoid fever.

Typhoid fever; Vaccine; Salmonella typhi; Enterobacterial common antigen; O and H antigens


Anticorpos contra o antígeno comum de enterobactérias (ECA) bem como contra os antigenos somáticos (O) e flagelar (H) de Salmonella typhi foram investigados no soro de recrutas do sexo masculino, após a vacinação. Não fo i detectada resposta humoral para ECA. Os soros obtidos antes da vacinação mostraram hemaglutininas para ECA acompanhando a presença de aglutininas para o antígeno H, ao contrário do que se observou em relação ao antígeno O. Discutem-se os resultados quanto ao possível mecanismo da imunoproteção da febre tifóide.

Febre tifóide; Vacinação; Antigenos comuns de enterobactérias e O e H de Salmonella typhi


ARTICLES

Investigation of the response to the enterobacterial common antigen after typhoid vaccination

Arlete M. MilhomemI; ítalo SuassunaII

IInstituto de Microbiologia, Universidade Federal do Rio de Janeiro, RJ, Brasil

IIFacuidade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, RJ, Brasil

ABSTRACT

Antibodies against the Salmonella typhi enterobacterial common antigen (ECA) and the O and H antigens were investigated in sera from healthy male subjects who had been previously vaccinated with the typhoid vaccine. No serological response to ECA was observed. Sera from subjects not previously vaccinated presented titers of ECA hemagglutinins which quantitatively were related to the presence ofH titers, but not to O agglutinins but with no statistical significance. The results are discussed in relation to the possible protective immunological mechanisms in typhoid fever.

Keywords: Typhoid fever. Vaccine. Salmonella typhi. Enterobacterial common antigen. O and H antigens.

RESUMO

Anticorpos contra o antígeno comum de enterobactérias (ECA) bem como contra os antigenos somáticos (O) e flagelar (H) de Salmonella typhi foram investigados no soro de recrutas do sexo masculino, após a vacinação. Não fo i detectada resposta humoral para ECA. Os soros obtidos antes da vacinação mostraram hemaglutininas para ECA acompanhando a presença de aglutininas para o antígeno H, ao contrário do que se observou em relação ao antígeno O. Discutem-se os resultados quanto ao possível mecanismo da imunoproteção da febre tifóide.

Palavras-chave: Febre tifóide. Vacinação. Antigenos comuns de enterobactérias e O e H de Salmonella typhi.

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Recebido para publicação em 10/3/86.

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Publication Dates

  • Publication in this collection
    06 June 2013
  • Date of issue
    Mar 1987

History

  • Received
    10 Mar 1986
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