Associated factors for diagnosis of influenza a (H1N1) 2009 in patients presenting to Rajavithi Hospital

Unsematham, S.; Ketbumrongporn, W.; Boonthongtho, K.

Journal of the Medical Association of Thailand 95(Suppl 3): S16-S21

2012


ISSN/ISBN: 0125-2208
PMID: 22619882
Document Number: 11072
The pandemic influenza A (H1N1) 2009 was a global outbreak of a new strain of influenza A virus. The associated factors of influenza A (H1N1) 2009 infection in Thailand have not been well studied. To determine the associated factors for diagnosis of influenza A (H1N1) 2009. Retrospective analytical study A total 430 patients who had influenza-like symptoms from the out-patient department of Rajavithi Hospital in Thailand were analyzed by collecting the hospital charts of the patients between 1 June 2009 and 31 August 2009, total 3 months. The patients' personal information, signs and symptoms, laboratory data and throat swab for influenza A (H1N1) 2009 virus confirmed by real time reverse transcription polymerase chain reaction were analyzed. There were 152 (35.3%) influenza A (H1N1) 2009 confirmed-case patients, 100 (65.80%) were female and 52 (34.2%) were male. The average age was 28.2 +/- 15.6 years and the most occupation were housewives (56.6%) and students (36.8%). The patients presented with acute fever (100.00%), cough (95.4%), rhinorrhea (66.4%), dyspnea (27.0%) and the mean duration of fever was 4.3 +/- 2.9 days at the time of sample collection. Laboratory finding such as leukocytes count, platelets count, lactate dehydrogenase and chest x-ray were normal in most cases. The associated factors of influenza A (H1N1) 2009 infection were age < 35, pregnancy, rhinorrhea and white blood count < 10,000 cells/ml3. The associated factors of influenza A (H1N1) 2009 were age < 35 years, pregnancy rhinorrhea and white blood count < 10,000 cells/ml3.

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