Authors’ addresses: Varatharajalu Ravi, Laboratory of Parasitic Diseases (LPD), National Institute of Allergy and Infectious Diseases (NIAID), 4 Center Drive, Room 4/126, National Institutes of Health (NIH), Bethesda, MD 20892, Telephone: 301-496-9892, Fax: 301-402-0079, E-mail:
Acknowledgments: The authors thank Mark Garfield for help with N-terminal amino acid sequencing of NIE antigen by Edman degradation and Brenda Rae Marshall for help preparing this manuscript.
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