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Current Trends Influenza Update -- United States
Influenza virus isolates from patients with sporadic cases of
respiratory illness continue to be reported. An influenza type B
isolate, the first from Michigan this season, was obtained in Ann
Arbor from a college student, who had onset of influenza in the
last
week of January. Further isolations of influenza A(H1N1) and B in
mid
and late January have been reported from Houston: the seasonal
totals
from Houston now include 7 type A and 68 type B isolates.
Influenza
type B virus was also isolated on January 27 from a 15-year-old
patient with respiratory illness in Phoenix, Arizona. This was the
first isolate of the season reported from Phoenix.
Tucson is the only locality in the United States with current
respiratory illness that is reporting influenza isolates.
Influenza B
has been isolated sporadically this season in the following states:
Arkansas, California, Colorado, Hawaii, Michigan, Nevada, New
Mexico,
New York, Texas, and Wisconsin. Influenza A(H1N1) has been
isolated
sporadically in California, New Jersey, Texas, and Utah. Influenza
B
isolates tested at CDC resemble B/Singapore/222/79, and influenza
A(H1N1) isolates resemble A/England/333/80.
Reported by A Monto, MD, University of Michigan, Ann Arbor, W Hall,
MD, N Hayner, MD, State Epidemiologist, Michigan Dept of Public
Health; K Starko, MD, Maricopa County, J Sarn PhD, J Sacks, State
Epidemiologist, Arizona Dept of Health Svcs; P Glezen, MD,
Influenza
Research Center, Houston, C Webb, Jr, MD, State Epidemiologist,
Texas
Dept of Health; Immunization Div, Center for Prevention Svcs,
Influenza Br, Viral Diseases Div, Center for Infectious Diseases,
CDC.
Disclaimer
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