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Emerg Microbes Infect ; 9(1): 1638-1650, 2020 Dec.
Article in English | MEDLINE | ID: mdl-32672516

ABSTRACT

Surveillance for the emerging infectious disease Eastern equine encephalitis, and its causative virus in mosquitoes, continued within New York State from 2013 to 2019. There were increases in geographic area and number of consecutive years, with cases in four mammalian species, and virus in 11 mosquito species. The first cases in a goat and in an emu were reported. The first detection of virus in Aedes cinereus was reported. Virus in phylogenetic group NY4 was isolated from a horse and from mosquitoes 6 kilometers and 13 days apart in 2013. Phylogenetic groups NY4 and NY5 were found 15 days apart in two towns 280 kilometers distant in 2013. Within four adjacent counties there was a pattern of overlap, where four had NY5, two adjacent counties had NY6, two adjacent counties had NY7, and one county had NY5, NY6, and NY7, reducible to a Euler diagram. Virus in phylogenetic group NY5, found within an 11-kilometer wide area in New York State, was related to FL4 found in Florida 1,398 kilometers distant. This was consistent with a phylogenetic group originating in Florida, then being moved to a specific location in New York State, by migratory birds in consecutive years 2013 and 2014.


Subject(s)
Culicidae/virology , Encephalitis Virus, Eastern Equine/classification , Horses/virology , Animals , Encephalitis Virus, Eastern Equine/genetics , Encephalitis Virus, Eastern Equine/isolation & purification , Florida , Goats/virology , Humans , New York , Phylogeny , Population Surveillance , Spatio-Temporal Analysis
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