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Since 1970, CDC has requested reports on enterovirus serotypes
isolated by state health department laboratories. These reports are
submitted to CDC on a monthly basis approximately 6 to 8 weeks
after a
specimen is submitted to the state virology laboratory. Since 1985,
reports from early in the enterovirus season (March-May) have been
tabulated and used to predict the types likely to be commonly
isolated
during the peak of the season (usually July-October).
This year, CDC has received reports of 47 nonpolio enterovirus
(NPEV) isolates identified by state virology laboratories from
March
through May. Echovirus 11 was isolated most frequently (nine
isolates), followed by echovirus 6 (eight isolates),
coxsackieviruses
B4 and A9 (five each), and coxsackievirus B3 and echoviruses 9 and
14
(three each). In 1986, the six most common NPEV isolates were
echovirus 11 (184 of the 1,192 isolates), echovirus 4 (162),
echovirus
7 (155), echovirus 18 (98), coxsackieviruses B4 and B5 (92 each).
These six NPEV types represented 66% of the total enterovirus
isolates
reported for 1986.
Reported by: State Virology Laboratory Directors. Respiratory and
Enterovirus Br, Div of Viral Diseases, Center for Infectious
Diseases,
CDC.
Editorial Note
Editorial Note: A retrospective study of CDC's NPEV surveillance
data shows that isolates from March through May predict the types
likely to be isolated from July through December, which includes
the
peak enterovirus season (1). In the past, the six most common
isolates
from March through May have accounted for an average of 59% of the
isolates from July through December. In 1986, they accounted for
52%
of the isolates from July through December. The reports of early
1987
isolates suggest that echoviruses 6, 9, 11, and 14 and
coxsackieviruses A9, B3, and B4 are likely to be common NPEV
isolates
this year. Six of the top seven isolates reported from March
through
May this year and all of the top six isolates reported in 1986 were
among the top 15 most frequently isolated NPEVs for the period
1970-1983 (1).
Reference
Strikas RA, Anderson LJ, Parker RA. Temporal and geographic
patterns of isolates of nonpolio enterovirus in the United
States,
1970-1983. J Infect Dis 1986;153:346-51.
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