Estimate of Plasmodium falciparum sporozoite content of Anopheles stephensi used to challenge human volunteers

J. R. Davis, J. R. Murphy, D. F. Clyde, S. Baqar, A. H. Cochrane, F. Zavala, R. S. Nussenzweig

Research output: Contribution to journalArticle


Plasmodium falciparum infected Anopheles stephensi, taken from a group of mosquitoes which had been used to challenge recipients of (NANP)3-TT vaccine, were tested for P. falciparum sporozoite content by an immunoradiometric assay. Seventy-six percent were infected with mean and median sporozoite equivalents per mosquito of 220,994 and 217,398, respectively (SD = 54,911). This sporozoite density is greater than that usually found in the field. These data suggest that this challenge for evaluating P. falciparum sporozoite vaccines is a demanding test of immunity.

Original languageEnglish (US)
Pages (from-to)128-130
Number of pages3
JournalAmerican Journal of Tropical Medicine and Hygiene
Issue number2
StatePublished - Jan 1 1989


ASJC Scopus subject areas

  • Parasitology
  • Virology
  • Infectious Diseases

Cite this