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Related Experiment Videos

Vaccination against hydatidosis using a defined recombinant antigen

M W Lightowlers1, S B Lawrence, C G Gauci

  • 1Molecular Parasitology Laboratory, University of Melbourne, Werribee, Victoria, Australia.

Parasite Immunology
|September 1, 1996
PubMed
Summary

A new vaccine targeting Echinococcus granulosus, the cause of hydatid disease, shows high protection rates in sheep. This EG95 antigen vaccine offers a promising strategy for controlling parasite transmission in animals and potentially humans.

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Area of Science:

  • Veterinary Parasitology
  • Vaccinology
  • Molecular Biology

Background:

  • Echinococcus granulosus causes hydatid disease in humans and animals.
  • Transmission occurs between dogs (definitive hosts) and various animal intermediate hosts.
  • Current control methods for hydatidosis are insufficient, necessitating new strategies.

Purpose of the Study:

  • To develop and evaluate a novel vaccine against Echinococcus granulosus.
  • To assess the efficacy of a recombinant oncosphere antigen (EG95) in preventing hydatidosis.

Main Methods:

  • Development of a vaccine using a cloned recombinant antigen (EG95) from the E. granulosus oncosphere.
  • Vaccination of sheep with the EG95 antigen.
  • Experimental challenge infection with E. granulosus eggs to assess protection.

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Main Results:

  • Sheep vaccinated with EG95 demonstrated high levels of protection (96-98%) against experimental hydatidosis.
  • The vaccine effectively prevented the development of hydatid disease following challenge infection.

Conclusions:

  • The EG95 vaccine is a valuable new tool for controlling Echinococcus granulosus transmission.
  • This vaccine has significant potential for reducing hydatid disease in animal populations and possibly in humans.