Safety, antigenicity, and efficacy of a recombinant coccidioidomycosis vaccine in cynomolgus macaques (Macaca fascicularis)

Suzanne M. Johnson, Nicholas W. Lerche, Demosthenes Pappagianis, Joann L. Yee, John N. Galgiani, Richard F. Hector

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations


The safety, immunogenicity and efficacy of recombinant Ag2/PRA106 + CSA chimeric fusion protein (CFP) vaccine in ISS/Montanide adjuvant-administered intramuscular (IM) was assessed in adult female cynomolgus macaques challenged with Coccidioides posadasii. Animals received three immunizations with either 5 μg CFP, 50-μg CFP, or adjuvant alone and were challenged 4 weeks following the final immunization. Although significant antibody response was produced in response to vaccination, there were no discernable adverse effects, suggesting that the vaccine was well tolerated. Upon intratracheal challenge, all animals showed evidence of disease. Two animals that received 5-μg doses of CFP were euthanatized prior to the study's end because of severe symptoms. Animals vaccinated with 50-μg doses of CFP showed evidence of enhanced sensitization compared to adjuvant controls and animals vaccinated with 5-μg doses of CFP. This was based on higher serum anti-CFP titers, enhanced secretion of interferon-gamma (IFN-γ) from stimulated bronchoalveolar lavage mononuclear cells (BALMC), reduced pulmonary radiologic findings following intratracheal challenge, reduced terminal complement fixation titers, and reduced necropsy findings. Overall the vaccine was well tolerated, induced sensitization, and resulted in a protective response when given at the higher 50-μg dose. Additional experiments may be needed to optimize the vaccination and to confer greater protection against lethal challenge.

Original languageEnglish (US)
Title of host publicationCoccidioidomycosis Sixth International Symposium
PublisherBlackwell Publishing Inc.
Number of pages11
ISBN (Print)1573316881, 9781573316880
StatePublished - Sep 2007

Publication series

NameAnnals of the New York Academy of Sciences
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632


  • Coccidioides
  • Coccidioidomycosis
  • Experimental model
  • Immunity
  • Infection
  • Primate
  • Vaccine

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry, Genetics and Molecular Biology
  • History and Philosophy of Science


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