Antigenic Relationships among Phlebotomus Fever Group Arboviruses and Their Implications for the Epidemiology of Sandfly Fever

Robert B. TeshMiddle America Research Unit, Gorgas Memorial Institute of Tropical and Preventive Medicine and National Institute of Allergy and Infectious Diseases, National Institutes of Health, U. S. Public Health Service, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University College of Medicine, Box 2011, Balboa Heights, Canal Zone

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Pauline H. PeraltaMiddle America Research Unit, Gorgas Memorial Institute of Tropical and Preventive Medicine and National Institute of Allergy and Infectious Diseases, National Institutes of Health, U. S. Public Health Service, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University College of Medicine, Box 2011, Balboa Heights, Canal Zone

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Robert E. ShopeMiddle America Research Unit, Gorgas Memorial Institute of Tropical and Preventive Medicine and National Institute of Allergy and Infectious Diseases, National Institutes of Health, U. S. Public Health Service, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University College of Medicine, Box 2011, Balboa Heights, Canal Zone

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Byron N. ChaniotisMiddle America Research Unit, Gorgas Memorial Institute of Tropical and Preventive Medicine and National Institute of Allergy and Infectious Diseases, National Institutes of Health, U. S. Public Health Service, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University College of Medicine, Box 2011, Balboa Heights, Canal Zone

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Karl M. JohnsonMiddle America Research Unit, Gorgas Memorial Institute of Tropical and Preventive Medicine and National Institute of Allergy and Infectious Diseases, National Institutes of Health, U. S. Public Health Service, Yale Arbovirus Research Unit, Department of Epidemiology and Public Health, Yale University College of Medicine, Box 2011, Balboa Heights, Canal Zone

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The antigenic relationships of 21 known or presumed Phlebotomus fever group serotypes and of 2 ungrouped, solvent sensitive, sandfly-associated arboviruses (Pacui and Charleville) were studied by complement fixation, plaque neutralization, and hemagglutination-inhibition methods. Results of complement fixation and neutralization tests were specific, allowing clear separation of the various serotypes, while those of the hemagglutination-inhibition test showed broader crossing and lack of specificity. Pacui virus was shown to be a member of the Phlebotomus fever serogroup. Six new Phlebotomus fever group serotypes are also described, increasing the known members of the group to 22. The implications of these and other recent data about the epidemiology of sandfly fever are discussed.

Author Notes

Present address: Pacific Research Section, NIAID, P. O. Box 1680, Honolulu, Hawaii 96806.

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