Contributors 



AVIS VAN ORDEN 



Histopathology Technician. Pathology Division, Bureau of" Laboratories 



ROBERT E. WEAVER, M.D.. Ph.D. 



Cliief, Special Bacteriology Section. Clinical Bacteriology Branch. Bacteriology Divisioti. Bureau of Lab- 

 oratories 



HAZEL W. WILKINSON. Ph.D. 



Chief". Special Immunology Laboratory. Bacterial Immunology Bratich. Bacteriology Division, Bureau 

 ot~ Laboratories 



LYNNP. YEALY. M.S. 



Medical Technologist, Bacterial Immunology Branch, Bacteriology Division, Bureau of Laboratories 



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