Rift Valley fever during rainy seasons, Madagascar, 2008 and 2009.
During 2 successive rainy seasons, January 2008 through May 2008 and November 2008 through March 2009, Rift Valley fever virus (RVFV) caused outbreaks in Madagascar. Human and animal infections were confirmed on the northern and southern coasts and in the central highlands. Analysis of partial sequences from RVFV strains showed that all were similar to the strains circulating in Kenya during 2006-2007. A national cross-sectional serologic survey among slaughterhouse workers at high risk showed that RVFV circulation during the 2008 outbreaks included all of the Malagasy regions and that the virus has circulated in at least 92 of Madagascar's 111 districts. To better predict and respond to RVF outbreaks in Madagascar, further epidemiologic studies are needed, such as RVFV complete genome analysis, ruminant movement mapping, and surveillance implementation.
Institut Pasteur, Antananarivo, Madagascar.
Soa Fy
SF
Andriamandimby
Armand Eugène
AE
Randrianarivo-Solofoniaina
Elisabeth M
EM
Jeanmaire
Lisette
L
Ravololomanana
Lanto Tiana
LT
Razafimanantsoa
Tsanta
T
Rakotojoelinandrasana
Josette
J
Razainirina
Jonathan
J
Hoffmann
Jean-Pierre
JP
Ravalohery
Jean-Théophile
JT
Rafisandratantsoa
Pierre E
PE
Rollin
Jean-Marc
JM
Reynes
D000330:Aedes; D000818:Animals; D002417:Cattle; D002522:Chlorocebus aethiops; D003430:Cross-Sectional Studies; D004196:Disease Outbreaks; D014644:Genetic Variation; D016679:Genome, Viral; D006041:Goats; D006801:Humans; D008270:Madagascar / Q000453:epidemiology; D010802:Phylogeny; D012367:RNA, Viral / Q000235:genetics / Q000302:isolation & purification; D011891:Rain; D012295:Rift Valley Fever / Q000453:epidemiology* / Q000821:virology; D012296:Rift Valley fever virus / Q000235:genetics*; D012621:Seasons; D017423:Sequence Analysis, RNA; D012756:Sheep; D013997:Time Factors; D014709:Vero Cells
D012367:RNA, Viral