In vitro potency test for evaluation of Clostridium perfringens type D epsilon toxoid

  • Salvarini F
  • Lobato Z
  • Pires P
  • et al.
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Abstract

The control of enterotoxemia caused by the epsilon toxin, produced by Clostridium perfringens type D, is based on vaccination with epsilon toxoid. The potency test for this immunogen is conducted using seroneutralization in mice. Here, an in vitro test for detection of neutralizing antibodies with Madin-Darby Canine Kidney (MDCK) cells was standardized in order to study alternative methodologies for the potency test. Titers observed in the in vivo and in vitro seroneutralization tests had a correlation of 99.73%.O controle da enterotoxemia causada pela toxina épsilon produzida por Clostridium perfringens tipo D é baseado na vacinação com toxoide. O teste de potência desse imunógeno é realizado utilizando-se a técnica de soroneutralização em camundongos. Objetivando-se estudar metodologias alternativas a essa técnica, padronizou-se um teste in vitro para detecção de anticorpos neutralizantes utilizando-se a linhagem celular Madin-Darby Canine Kidney (MDCK). Os títulos observados nas soroneutralizações in vivo e in vitro apresentaram correlação de 99,73%.

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Salvarini, F. M., Lobato, Z. I. P., Pires, P. S., Silva, R. O. S., Alves, G. G., Pereira, P. L. L., & Lobato, F. C. F. (2013). In vitro potency test for evaluation of Clostridium perfringens type D epsilon toxoid. Arquivos Do Instituto Biológico, 80(4), 450–452. https://doi.org/10.1590/s1808-16572013000400013

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