• Vaccine Name: P. falciparum pfCelTos protein vaccine
• Target Pathogen: Plasmodium spp.
• Target Disease: Malaria
• Vaccine Ontology ID: VO_0004204
• Type: Subunit vaccine
• Status: Research
• Host Species as Laboratory Animal Model: mouse
• pfCelTOS gene engineering:
  • Type: Recombinant protein preparation
  • Description:
  • Detailed Gene Information: Click Here.
• Adjuvant:
  • Adjuvant name:
  • VO adjuvant ID: VO_0001268
  • Description: Montanide ISA 720
• Immunization Route: subcutaneous injection

Mouse Response

• Host Strain: Balb/c-J
• Vaccination Protocol: Mice were immunized subcutaneously in the scruff of the neck three times with 25 or 10 or 1 µg/dose of recombinant PfCelTOS or saline emulsified in Montanide ISA 720 (Bergmann-Leitner et al., 2010).
• Challenge Protocol: Fourteen days after the final immunization, mice were challenged by subcutaneous inoculation (into the inguinal region) with 4,000 P. berghei sporozoites for Balb/c and 15,000 P. berghei sporozoites for CD-1 mice, dissected from infected mosquito salivary glands. The challenge dose was determined by titration studies in each mouse strain and compared to the different challenge routes. Infection was determined by the presence of blood stage parasites in Giemsa stained thin blood smears on day 6 and day 8 after challenge. Animals that were not infected at that time were tested again on day 14. Mice that remained un-infected by day 14 were classified as sterilely protected. We used this evaluation schedule because animals that are infected with P. berghei ANKA strain malaria parasites do not self-cure.
• Efficacy Detail:

  No.	Efficacy method	Result	Description	Group Efficacy Detail
  1		CFU	Immunization with PfCelTOS resulted in potent humoral and cellular immune responses and most importantly induced sterile protection against a heterologous challenge with P. berghei sporozoites in a proportion of both inbred and outbred mice (Bergmann-Leitner et al., 2010).