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Epidemiologic Notes and Reports Influenza Activity, April-May, United States, 1982

Several states reported influenza activity in April and May 1982, including the first laboratory isolations of influenza virus for the season in Idaho, Ohio, and West Virginia. In Idaho, influenza B virus was isolated from several patients in a nursing home during an outbreak of influenza that affected more than half the residents and continued from mid-April to early May, and in Ohio and West Virginia influenza B viruses were isolated from patients with sporadic cases who became ill in April and May, respectively.

Outbreaks of influenza occurred in institutions in California, Montana, New York, and South Dakota in April or May. However, little other coincident influenza activity was noted in the surrounding communities when these focal outbreaks occurred. At a Job Corps Center in Upstate New York, almost 200 of the 380 residents had influenza-like illness during an outbreak that began in mid-April. Influenza type A(H1N1) virus was isolated from 4 of 10 patients tested. In South Dakota, approximately half of the 80 residents of a nursing home had influenza-like illness early in April. Serologic testing following the outbreak suggested that these persons had recently had influenza B infection. In April, influenza B was also serologically diagnosed as being associated with an outbreak of illness in a nursing home in Montana. In California, an outbreak of influenza began in early May and affected about half of the patients and staff members in 2 of 5 wards in a state hospital. Influenza B viruses were isolated from patients in both wards. Reported by R Moulton, F R Dixon, MD, State Epidemiologist, Idaho Div of Health; J Porterfield-Baxa, T Halpin, MD, State Epidemiologist, Ohio Dept of Health; R Belshe, MD, Marshall University, Huntington, L Haddy, State Epidemiologist, West Virginia State Dept of Health; R Deibel, PhD, R Rothenberg, MD, State Epidemiologist, New York Dept of Health; R Melton, PhD, K Sanger, State Epidemiologist, South Dakota Dept of Health; J Brinker, J Anderson, MD, State Epidemiologist, Montana Dept of Health and Environmental Svcs; DM O'Connor, MD, Napa State Hospital, J Schieble, PhD, J Chin, MD, State Epidemiologist, California Dept of Health Svcs; Influenza Br, Center for Infectious Diseases, CDC.

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