Since mid-December 1982, influenza outbreaks have been
confirmed
by virus isolation in Michigan and Minnesota. At a nursing home in
Genesee County, Michigan, 19 (11%) of 167 residents have
experienced
influenza-like illness since December 13, and three type A(H3N2)
viruses have been isolated from four respiratory specimens. In
Crawford County, Michigan, 26% and 21% absenteeism rates associated
with influenza-like illness have been reported in an elementary
school
and a high school, respectively; five type A(H3N2) viruses have
been
isolated.
A virus isolate in Minnesota was recovered from a 2-year-old
child
in a Hennepin County day-care center, where about 40% of the
approximately 100 children have experienced influenza-like illness
since December 6. Several central Minnesota schools reported
increased absenteeism due to influenza-like illness just before the
winter vacation.
Since October, influenza type A(H3N2) viruses have been
isolated
in 15 states (Alaska, Arizona, Georgia, Hawaii, Michigan,
Minnesota,
Montana, New York, Oregon, Pennsylvania, Tennessee, Texas, Utah,
Virginia, and Washington) and outbreaks or community spread
reported
in five states (Alaska, Michigan, Minnesota, Montana, and New
York).
Through the end of 1982, pneumonia and influenza deaths reported
from
121 cities indicated no significant elevation. All virus isolates
submitted to CDC for characterization have been influenza type
A(H3N2)
closely related to A/Bangkok/1/79 (H3N2).
Reported by W Moon, MD, Crawford County, B Berman, MD, Genesee
County,
Michigan; C Hedberg, V Thelen, Hennepin County, Minnesota; State
Laboratory Directors and State Epidemiologists, Consolidated
Surveillance Activity, Epidemiology Program Office, WHO
Collaborating
Center for Influenza, Influenza Br, Div of Viral Diseases, Center
for
Infectious Diseases, CDC.
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