In this issue of AJTMH, Roestenberg and colleagues report that healthy adults can be infected by the intradermal injection of aseptic, purified, vialed, cryopreserved Plasmodium falciparum sporozoites (PfSPZ Challenge).1 Because of the potential of this “challenge in a bottle” to standardize and dramatically expand the use of controlled human malaria infections (CHMI) for assessment of malaria vaccines, drugs, and diagnostics, and naturally acquired immunity and innate resistance to malaria, this approach to CHMI may well turn out to be one of the major achievements in malaria vaccine research and development of the past half-century.
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Read the new paper published today in Vaccine.
Typically, vaccines distributed through the Expanded Program on Immunization (EPI) use a 2-8°C cold chain with 4-5 stops. The PfSPZ Vaccine comprises whole live-attenuated cryopreserved sporozoites stored in liquid nitrogen (LN(2)) vapor phase (LNVP) below -140°C and would be distributed through a LNVP cold chain. The purpose of this study was to model LNVP cold chain distribution for the cryopreserved PfSPZ Vaccine in Tanzania, estimate the costs and compare these costs to those that would be incurred in distributing a ‘conventional’ malaria vaccine through the EPI. Capital and recurrent costs |
Read the new paper published in Journal of Infectious Diseases.
We established a new field clone of Plasmodium falciparum for use in controlled human malaria infections and vaccine studies to complement the current small portfolio of P. falciparum strains, primarily based on NF54. The Cambodian clone NF135.C10 consistently produced gametocytes and generated substantial numbers of sporozoites in Anopheles mosquitoes and diverged from NF54 parasites by genetic markers. In a controlled human malaria infection trial, 3 of 5 volunteers challenged by mosquitoes infected with NF135.C10 and 4 of 5 challenged with NF54 developed parasitemia as detected with microscopy. The |
In the latest edition of Healio, the health care specialist publication reports on Sanaria’s abstract at ASTMH and the concept of injectable parasites being able to control malaria infections.|
Read the new paper published today in American Journal of Tropical Medicine and Hygiene.
Controlled human malaria infection with sporozoites is a standardized and powerful tool for evaluation of malaria vaccine and drug efficacy but so far only applied by exposure to bites of Plasmodium falciparum (Pf)-infected mosquitoes. We assessed in an open label Phase 1 trial, infection after intradermal injection of respectively 2,500, 10,000, or 25,000 aseptic, purified, vialed, cryopreserved Pf sporozoites (PfSPZ) in three groups (N = 6/group) of healthy Dutch volunteers. Infection was safe and parasitemia developed in 15 of 18 volunteers (84%), 5 of |
Sanaria has been featured in The Washington Post about an event for local students to give them experience with science outside the classroom. Read more about what a great time we had!|
