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1.
Na S, Kim MN, Kim WY, Kim W, Hong SB, Lim CM, Koh Y, Kwon JW, Hong SJ, Lee SO, Choi SH, Kim YS, Woo JH, Kim SH, 2011. Prevalence and clinical features of pneumonia in patients with laboratory-confirmed pandemic influenza A H1N1 2009 infection in South Korea. Scand J Infect Dis 43: 19–26.
-
2.
Department of Disease Control, Ministry of Public Health, Thailand, 2009. The Prevention of a New Strain of Influenza H1N1. Available at: http:/203.157.15.4/Flu/situation/y52/flu_200907291523.pdf.
-
3.
Cao B, Li XW, Mao Y, Wang J, Lu HZ, Chen YS, Liang ZA, Liang L, Zhang SJ, Zhang B, Gu L, Lu LH, Wang DY, Wang C; National Influenza A Pandemic (H1N1), 2009. Clinical Investigation Group of China, 2009. Clinical features of the initial cases of 2009 pandemic influenza A (H1N1) virus infection in China. N Engl J Med 361: 2507–2517.
-
4.
Phungoen P, Sawanyawisuth K, Engchanil C, Sutra S, Rangsrikajee D, Lulitanond V, Srinakarin J, Pithak P, Bourpoern J, Phondongnok S, 2011. Clinical factors predictive of PCR positive in pandemic H1N1 2009 influenza virus infection. Influenza Other Respir Viruses 5: e558–e562.
-
5.
Kanchana S, Kanchana S, Chuntrakul C, Malathum K, Prachayangprecha S, Poovorawan Y, 2011. Pandemic (H1N1) 2009 virus infection: persistent viral shedding after oseltamivir treatment. J Infect 63: 295–299.
-
6.
Perez-Padilla R, de la Rosa-Zamboni D, Ponce de Leon S, Hernandez M, Quiñones-Falconi F, Bautista E, Ramirez-Venegas A, Rojas-Serrano J, Ormsby CE, Corrales A, Higuera A, Mondragon E, Cordova-Villalobos JA; INER Working Group on Influenza, 2009. Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico. N Engl J Med 361: 680–689.
-
7.
Narasaraju T, Yang E, Samy RP, Ng HH, Poh WP, Liew AA, Phoon MC, van Rooijen N, Chow VT, 2011. Excessive neutrophils and neutrophil extracellular traps contribute to acute lung injury of influenza pneumonitis. Am J Pathol 179: 199–210.
-
8.
Tate MD, Ioannidis LJ, Croker B, Brown LE, Brooks AG, Reading PC, 2011. The role of neutrophils during mild and severe influenza virus infections of mice. PLoS ONE 6: e17618.
-
9.
Mu YP, Zhang ZY, Chen XR, Xi XH, Lu YF, Tang YW, Lu HZ, 2010. Clinical features, treatments and prognosis of the initial cases of pandemic influenza H1N1 2009 virus infection in Shanghai China. QJM 103: 311–317.
-
10.
Ko JH, Kim JH, Kang JH, Kim JH, Eun BW, Kim KH, Hong JY, Oh SH, 2012. Characteristics of hospitalized children with 2009 pandemic influenza A (H1N1): a multicenter study in Korea. J Korean Med Sci 27: 408–415.
-
11.
Ornek T, Yalçın FD, Ekin S, Yalçın S, Yemişen M, 2011. Pneumonia in patients with novel influenza A (H1N1) virus in southeastern Turkey. Wien Klin Wochenschr 123: 106–111.
| Past two years | Past Year | Past 30 Days | |
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| Abstract Views | 13 | 13 | 3 |
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Clinical Factors Predictive of Pneumonia Caused by Pandemic 2009 H1N1 Influenza Virus
Sawan Kanchana
Sawan Kanchana
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Supannakhon Kanchana
Supannakhon Kanchana
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Teerapon Vijitsopa
Teerapon Vijitsopa
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Kreeta Thammakumpee
Kreeta Thammakumpee
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Sukit Yamwong
Sukit Yamwong
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Kittisak Sawanyawisuth
Kittisak Sawanyawisuth
Departments of Medicine, Paediatrics, and Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand; Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand; Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand; Department of Medicine, Faculty of Medicine, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand
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Pneumonia was the most common cause of death during the 2009 pandemic H1N1 influenza virus infection. Clinical risk factors for pneumonia caused by this virus are limited. We enrolled consecutive patients treated at the H1N1 Clinic in Thungsong Hospital in Nakhon Si Thammarat, Thailand, during June–December 2009 who had positive polymerase chain reaction results for H1N1 virus. Clinical features for patients given a diagnosis with and without pneumonia were studied. There were 441 patients with positive polymerase chain reaction results for H1N1 virus. Of these patients, 51 (11.56%) had pneumonia. Three independent clinical factors for H1N1 pneumonia were myalgia, dyspnea, and an absolute neutrophil count > 7,700 cells/μL. Adjusted odds ratios (95% confidence intervals) for these three variables were 0.413 (0.173–0.988), 2.625 (1.230–5.604), and 4.475 (1.882–10.644), respectively. Clinical features may be a useful tool for predicting risk for pneumonia caused by H1N1 virus.
Author Notes
Financial support: This study was partially supported by Thai Health Promotion Foundation (Thai Health), the Thailand Research Fund, and Center of Excellence in Clinical Virology.
Authors' addresses: Sawan Kanchana, Department of Medicine, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand, E-mail: Doctornursethailoyalty@hotmail.com. Supannakhon Kanchana, Department of Paediatrics, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand, E-mail: Doctornursethailoyalty@yahoo.com. Teerapon Vijitsopa, Department of Radiology, Thungsong Hospital, Walailak University School of Medicine, Nakhon Si Thammarat, Thailand, E-mail: Tkreetha@medicine.psu.ac.th. Kreeta Thammakumpee, Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand, E-mail: Tkreetha@medicine.psu.ac.th. Sukit Yamwong, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand, E-mail: rasyw@mahidol.ac.th. Kittisak Sawanyawisuth, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand, and Research and Training Center for Enhancing Quality of Life of Working-Age People, Khon Kaen University, Khon Kaen, Thailand, E-mail: kittisak@kku.ac.th.
ProCite
RefWorks
Reference Manager
BibTeX
Zotero
EndNote
-
1.
Na S, Kim MN, Kim WY, Kim W, Hong SB, Lim CM, Koh Y, Kwon JW, Hong SJ, Lee SO, Choi SH, Kim YS, Woo JH, Kim SH, 2011. Prevalence and clinical features of pneumonia in patients with laboratory-confirmed pandemic influenza A H1N1 2009 infection in South Korea. Scand J Infect Dis 43: 19–26.
-
2.
Department of Disease Control, Ministry of Public Health, Thailand, 2009. The Prevention of a New Strain of Influenza H1N1. Available at: http:/203.157.15.4/Flu/situation/y52/flu_200907291523.pdf.
-
3.
Cao B, Li XW, Mao Y, Wang J, Lu HZ, Chen YS, Liang ZA, Liang L, Zhang SJ, Zhang B, Gu L, Lu LH, Wang DY, Wang C; National Influenza A Pandemic (H1N1), 2009. Clinical Investigation Group of China, 2009. Clinical features of the initial cases of 2009 pandemic influenza A (H1N1) virus infection in China. N Engl J Med 361: 2507–2517.
-
4.
Phungoen P, Sawanyawisuth K, Engchanil C, Sutra S, Rangsrikajee D, Lulitanond V, Srinakarin J, Pithak P, Bourpoern J, Phondongnok S, 2011. Clinical factors predictive of PCR positive in pandemic H1N1 2009 influenza virus infection. Influenza Other Respir Viruses 5: e558–e562.
-
5.
Kanchana S, Kanchana S, Chuntrakul C, Malathum K, Prachayangprecha S, Poovorawan Y, 2011. Pandemic (H1N1) 2009 virus infection: persistent viral shedding after oseltamivir treatment. J Infect 63: 295–299.
-
6.
Perez-Padilla R, de la Rosa-Zamboni D, Ponce de Leon S, Hernandez M, Quiñones-Falconi F, Bautista E, Ramirez-Venegas A, Rojas-Serrano J, Ormsby CE, Corrales A, Higuera A, Mondragon E, Cordova-Villalobos JA; INER Working Group on Influenza, 2009. Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico. N Engl J Med 361: 680–689.
-
7.
Narasaraju T, Yang E, Samy RP, Ng HH, Poh WP, Liew AA, Phoon MC, van Rooijen N, Chow VT, 2011. Excessive neutrophils and neutrophil extracellular traps contribute to acute lung injury of influenza pneumonitis. Am J Pathol 179: 199–210.
-
8.
Tate MD, Ioannidis LJ, Croker B, Brown LE, Brooks AG, Reading PC, 2011. The role of neutrophils during mild and severe influenza virus infections of mice. PLoS ONE 6: e17618.
-
9.
Mu YP, Zhang ZY, Chen XR, Xi XH, Lu YF, Tang YW, Lu HZ, 2010. Clinical features, treatments and prognosis of the initial cases of pandemic influenza H1N1 2009 virus infection in Shanghai China. QJM 103: 311–317.
-
10.
Ko JH, Kim JH, Kang JH, Kim JH, Eun BW, Kim KH, Hong JY, Oh SH, 2012. Characteristics of hospitalized children with 2009 pandemic influenza A (H1N1): a multicenter study in Korea. J Korean Med Sci 27: 408–415.
-
11.
Ornek T, Yalçın FD, Ekin S, Yalçın S, Yemişen M, 2011. Pneumonia in patients with novel influenza A (H1N1) virus in southeastern Turkey. Wien Klin Wochenschr 123: 106–111.
| Past two years | Past Year | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 13 | 13 | 3 |
| Full Text Views | 223 | 74 | 0 |
| PDF Downloads | 52 | 9 | 0 |