| occurrence of influenza among patients hospitalized for suspicion of influenza a (h1n1) infection in 2010 at a sentinel hospital in são paulo, brazil. | in 2010, 96 patients suspected of being infected with the influenza a (h1n1) virus were hospitalized at the hospital são paulo, located in the city of são paulo, brazil. of those 96 patients, 4 (4.2%) were found to be infected with influenza a virus-3 with influenza a (h1n1) and 1 with seasonal influenza a-and 2 patients (2.1%) were found to be infected with influenza b virus. most (63.5%) of the suspected cases occurred in children, as did half of the positive cases. the second wave of influenz ... | 2011 | 22042398 |
| acute respiratory infection and influenza-like illness viral etiologies in brazilian adults. | influenza-like illness (ili) definitions have been used worldwide for influenza surveillance. these different case definitions can vary with regard to sensitivity and predictive values for laboratory confirmed influenza. the literature has indicated the inclusion of other viruses may be the cause of these variable results. the objective of the study was to evaluate ili national sentinel criteria and viral etiologies in adults diagnosed with acute respiratory infection (ari) and/or ili from 2001 ... | 2008 | 18712837 |
| [influenza]. | influenza (flu) is an acute contagious viral infection characterized by inflammation of the respiratory tract that every winter affects more than 100 million people in europe, japan and the united states of america, also being responsible for several thousand of excess deaths (data from the united states reveal between 20,000 to 40,000 excess deaths annually). the mixovirus influenzae is the agent that causes influenza, commonly called flu. there are 3 types of influenza virus: a, b, c, and only ... | 2003 | 12806464 |