TY - JOUR
T1 - Yellow fever in Pará State, Amazon region of Brazil, 1998-1999
T2 - Entomologic and epidemiologic findings
AU - Vasconcelos, Pedro F.C.
AU - Rosa, Amélia P.A.T.
AU - Rodrigues, Sueli G.
AU - Rosa, Elizabeth S.T.
AU - Monteiro, Hamilton A.O.
AU - Cruz, Ana C.R.
AU - Barros, Vera L.R.S.
AU - Souza, Maria R.
AU - Rosa, Jorge F.S.T.
PY - 2001
Y1 - 2001
N2 - Yellow fever (YF) is frequently associated with high severity and death rates in the Amazon region of Brazil. During the rainy seasons of 1998 and 1999, 23 (eight deaths) and 34 (eight deaths) human cases of YF were reported, respectively, in different geographic areas of Pará State; most cases were on Marajó Island. Patients were 1 to 46 years of age. Epidemiologic and ecological studies were conducted in Afuá and Breves on Marajó Island; captured insects yielded isolates of 4 and 11 YF strains, respectively, from Haemagogus janthinomys pooled mosquitoes. The cases on Marajó Island in 1999 resulted from lack of vaccination near the focus of the disease and intense migration, which brought many nonimmune people to areas where infected vectors were present. We hypothesize that YF virus remains in an area after an outbreak by vertical transmission among Haemagogus mosquitoes.
AB - Yellow fever (YF) is frequently associated with high severity and death rates in the Amazon region of Brazil. During the rainy seasons of 1998 and 1999, 23 (eight deaths) and 34 (eight deaths) human cases of YF were reported, respectively, in different geographic areas of Pará State; most cases were on Marajó Island. Patients were 1 to 46 years of age. Epidemiologic and ecological studies were conducted in Afuá and Breves on Marajó Island; captured insects yielded isolates of 4 and 11 YF strains, respectively, from Haemagogus janthinomys pooled mosquitoes. The cases on Marajó Island in 1999 resulted from lack of vaccination near the focus of the disease and intense migration, which brought many nonimmune people to areas where infected vectors were present. We hypothesize that YF virus remains in an area after an outbreak by vertical transmission among Haemagogus mosquitoes.
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U2 - 10.3201/eid0707.010738
DO - 10.3201/eid0707.010738
M3 - Article
C2 - 11485676
AN - SCOPUS:0034897824
SN - 1080-6040
VL - 7
SP - 565
EP - 569
JO - Emerging infectious diseases
JF - Emerging infectious diseases
IS - 3
ER -