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Volume 9, Number 8—August 2003

Research

Enzootic Transmission of Yellow Fever Virus in Peru

Juliet E. Bryant*, Heiman Wang*, Cesar Cabezas†, Gladys Ramirez‡, Douglas Watts*, Kevin Russell§, and Alan Barrett*Comments to Author 
Author affiliations: *University of Texas Medical Branch, Galveston, Texas, USA; †Instituto Nacional de Salud, Lima, Peru; ‡Ministry of Health, Lima, Peru; §U.S. Naval Medical Research Center Detachment, Lima, Peru

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Table 1

Peruvian yellow fever isolates used in this studya

Strain ID Date of illness onset Sequence ID Department Community Elevationb Ecozone Passage historyc
1362/77 6/1977 PERU77A Ayacucho San Francisco 1,000–2,000 df-S or df-LM c6/36#2
1368 6/1977 PERU77B Ayacucho Tribolina 1,000–2,000 vhf-S SM1, Vero1, C6/36#2
1371 6/1977 PERU77C Ayacucho Chontacocha 0–1,000 hf-S SM1, Vero1, C6/36#2
287/78 2/22/1978 PERU78 Ayacucho San Francisco 1,000–2,000 sf-S SM1, Mosq 2
R 35740 2/1979 PERU79 Ayacucho Alto Montaro 0–1,000 vhf-S SM1, Mosq 2
1899/81 6/19/1981 PERU81A Cusco Cusco 2,000–3,000 hf-M SM1
1914c 6/12/1981 PERU81B Cusco Cusco 2,000–3,000 hf-M LLCMK2, Vero 1, C6/36#1
ARVO544 1995 PERU95A San Martin Tocache Huaquisha 0–1,000 hf-T near vhf-S SM1, Vero1, C6/36#2
HEB4224 1995 PERU95B San Martin Tocache Nuevo Progresso 2,000–3,000 hf-T near vhf-S, vhf-LM SM1, C6/36#1
HEB4236 3/2/1995 PERU95C Pasco Oxapampa Villa Rica 1,000–2,000 hf-M C6/36#1
149 3/95 PERU95D Pasco Oxapampa Villa Rica 1,000–2,000 hf-M SM1, C6/36#1
Cepa#2 9/95 PERU95E Puno No data 2,000–3,000 hf-S SM1, C6/36#1
Cepa#1 9/95 PERU95F Puno No data 2,000–3,000 hf-S C6/36#2
OBS 2240 2/95 PERU95G Huanuco Hermil 1,000–2,000 vhf-LM C6/36#2
OBS 2250 5/16/1995 PERU95H Huanuco Hermil 1,000–2,000 vhf-LM SM1, C6/36#1
HEB 4240 1/30/1995 PERU95I Junin Chachamayo 1,000–2,000 hf-LM C6/36#1, SM1
HEB 4245 3/6/1995 PERU95J Junin Chachamayo 1,000–2,000 hf-LM SM1, C6/36#1
HEB 4246 3/8/1995 PERU95K Junin Chachamayo 1,000–2,000 hf-LM SM1, C6/36#1
OBS 2243 2/95 PERU95L Huanuco No data 1,000–2,000 vhf-LM SM1, C6/36#1
ARV 0548 3/19/1995 PERU95M San Martin Tocache Huaquisha 0–1,000 hf-T near vhf-S SM1, C6/36#1
OBS 6530 3/26/1998 PERU98A Cusco Echarate 1,000–2,000 df-S SM1, C6/36#1
03-5350-98 3/13/1998 PERU98B Cusco Kanaiquinaba 2,000–3,000 sf-S C6/36#2
OBS 6745 3/29/1998 PERU98C Cusco Minsa/C.S. Moronacocha 1,000–2,000 hf-M C6/36#2
IQT 5591 1/19/1998 PERU98D Loreto Belen, Tihuensa 0–1,000 hf-T C6/36#2
OBS 7904 5/5/1999 PERU99 San Martin Tarapoto 2,000–3,000 hf-S and vhf-S Vero1, C6/36#3

aSM, suckling mouse; df-S, dry forest-subtropical; df-LM, dry forest-lower montane; vhf-S, very humid forest-subtropical; hf-S, humid forest-subtropical; sf-S, shrub forest-subtropical; hf-M, humid forest-montane; hf-T, humid forest-tropical; vhf-LM, very humid forest-lower montane; hf-LM, humid forest-lower montane.
bElevation, range of meters above sea level for the ecozone immediately surrounding the place of viral origin.
cPassage history of seed strain in collection.
dStrain 1914 was obtained from a sentinel mouse.

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