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Volume 15, Number 12—December 2009

Dispatch

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. FryComments to Author 
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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