Emerging Infectious Disease ISSN: 1080-6059

Outbreak of Antiviral Drug–Resistant Influenza A in Long-Term Care Facility, Illinois, USA, 2008

Nila J. Dharan¹, Monica Patton¹, Alicia M. Siston², Julie Morita, Enrique Ramirez, Teresa R. Wallis, Varough Deyde, Larisa V. Gubareva, Alexander I. Klimov, Joseph S. Bresee, and Alicia M. Fry

Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (N.J. Dharan, M. Patton, T.W. Wallis, V. Deyde, L.V. Gubareva, A.I. Klimov, J.S. Bresee, A.M. Fry); Chicago Department of Public Health, Chicago, Illinois, USA (A.M. Siston, J. Morita, E. Ramirez); 1Current affiliation: New York University School of Medicine, New York, New York, USA.; 2Current affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA.

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Figure 1

Number of cases of influenza by date of symptom onset and outbreak control protocol during an influenza A outbreak in a long-term care facility, Illinois, USA, 2008. Retrospective medical chart review of all nontested building A residents identified 1 potential missed case-patient with influenza who had symptom onset on January 29. Additional cases were detected in 2 other residential buildings in the long-term care facility (buildings B and C). Building B housed 53 residents in 4 wards and buil

Figure 1. Number of cases of influenza by date of symptom onset and outbreak control protocol during an influenza A outbreak in a long-term care facility, Illinois, USA, 2008. Retrospective medical chart review of all nontested building A residents identified 1 potential missed case-patient with influenza who had symptom onset on January 29. Additional cases were detected in 2 other residential buildings in the long-term care facility (buildings B and C). Building B housed 53 residents in 4 wards and building C housed 16 residents in 1 ward. All (100%) of residents in both buildings had received the 2007–08 influenza vaccine. Of the 16 rapid test specimens with negative results from all 3 buildings that were subjected to confirmatory testing, 5 (31%) were positive by reverse transcription–PCR for influenza A virus (H1N1).

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