Epidemic O'Nyong-Nyong fever in southcentral Uganda, 1996-1997: entomologic studies in Bbaale village, Rakai District

• Published in: The American journal of tropical medicine and hygiene Vol. 61; no. 1; p. 158
• Main Authors: Lutwama, J J, Kayondo, J, Savage, H M, Burkot, T R, Miller, B R
• Format: Journal Article
• Language: English
• Published: United States 01-07-1999
• Subjects: Alphavirus - growth & development; Alphavirus Infections - epidemiology; Alphavirus Infections - transmission; Animals; Anopheles - virology; Cercopithecus aethiops; Disease Outbreaks; Fluorescent Antibody Technique, Indirect; Humans; Insect Vectors - virology; Insecticides; Neutralization Tests; Pyrethrins; Rural Population; Togaviridae - growth & development; Togaviridae Infections - epidemiology; Togaviridae Infections - transmission; Uganda - epidemiology; Vero Cells; Uganda
• ISSN: 0002-9637
• DOI: 10.4269/ajtmh.1999.61.158

Entomologic studies were conducted between January 27 and February 2, 1997, in Bbaale village in southcentral Uganda during an o'nyong-nyong (ONN) virus epidemic, which began in mid 1996 and continued into 1997. The objectives were to confirm the role of anophelines in ONN virus transmission and to examine other mosquito species as epidemic vectors of ONN virus. Of 10,050 mosquitoes collected using light traps and pyrethrum knockdown sprays, Anopheles (Cellia) funestus Giles was presumed to be the principal vector because it was the most abundant mosquito species from which a strain of ONN virus was isolated. This virus was isolated for the first time from a culicine species, Mansonia (Mansonioides) uniformis Theobald. Bwamba virus and Nyando virus were also isolated from An. funestus.