Both vaccines were immunogenic following the 3-dose series with response rates of approximately 90%. There were no significant differences in either TNA or ELISA geometric mean titers (GMT) between the vaccine groups 14 days after the third vaccination. A strong immunologic memory response was observed at both 6 months and 12 months and no differences were seen between SparVax(TM) groups in terms of response rate or GMT measured by TNA.
The study concluded that SparVax(TM) was safe, well-tolerated and produced antibody responses comparable to the currently licensed product. The lower incidence of injection site reactions observed with SparVax(TM) may indicate that it is better tolerated than BioThrax(R), with good immunologic memory demonstrated after antigen exposure at 6 or 12 months.
"This is an important finding and supports the rationale for stockpiling a highly purified second generation anthrax vaccine utilizing modern vaccine technology as described in the March 2002 Institute of Medicine report, The Anthrax Vaccine: Is It Safe; Does it Work?," said Mr. Wright.
The SparVax(TM) Phase II clinical trial has been funded in whole or in part with Federal funds from the National Institute of Allergy and Infectious Disease, National Institutes of Health.
Conference Call and Webcast Information
PharmAthene management will host a conference call to provide an update on the SparVax(TM) program on Wednesday, April 29, 2009, at 4:30 p.m., E.T. The dial-in number for U.S. callers is 1-866-788-0540 and for international callers is 857-350-1678. The participant passcode is 82129094.
A replay of the conference call will be available for 30 days, beginning at approximately 7:30 p.m. E.T. on April 29, 2009 until approximately 11:59 p.m. E.T. May 29
|SOURCE PharmAthene, Inc.|
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