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Background Poxviruses constitute one of the largest and most complex animal virus families known. The notorious smallpox disease has been eradicated and the virus contained, but its simian sister, monkeypox is an emerging, untreatable infectious disease, killing 1 to 10 % of its human victims. In the case of poxviruses, the emergence of monkeypox outbreaks in humans and the need to monitor potential...
Conventional vaccines used for smallpox eradication were often denoted one or another strain of Vaccinia virus (VACV), even though seed virus was sub-cultured multifariously, which rendered the virion population genetically heterogeneous. ACAM2000 cell culture vaccine, recently licensed in the U.S., consists of a biologically vaccine-like VACV homogeneous-sequence clone from the conventional smallpox...
In this study we characterized the immunogenic properties of three different multi-species multiple antigen constructs (MACs) carrying the circumsporozoite protein (CSP) repeats of human malaria parasites, Plasmodium falciparum and P. vivax. We synthesized tetrameric MACs containing the antigenic repeats from the CSP of P. vivax-like parasite in two arms and CSP repeat sequences of either P. vivax...
Previous attempts in inducing protective immunity against Plasmodium vivax in human volunteers and nonhuman primates with recombinant circumsporozoite (CS) proteins have been unsuccessful, largely due to the failure of generating antibodies against the protective B epitope AGDR in the CS protein repeat region. We report here an immunization study in Saimiri monkeys with a multiple antigen construct...
Cytolytic T cells (CTL) play a critical role in providing protection against the liver stage of malaria infection. Previous investigations have shown that induction of CTL against peptide or proteins can be achieved by attachment of lipids. In the present study, we used the Plasmodium berghei circumsporozoite protein CTL epitope (SYIPSAEKI (PL76)). This peptide with cysteine-serine (CS) as spacer...
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