id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-004535-p4s5uqz8	Luyt, Charles-Edouard	Virus diseases in ICU patients: a long time underestimated; but be aware of overestimation	2006-05-24		.txt	text/plain	1274	77	42	showed that viruses could trigger 39% of COPD exacerbations, rhinovirus being the main virus recovered from the upper respiratory tract [4] . In the same study, the authors showed that respiratory viruses (except respiratory syncytial virus (RSV)) were detected in the upper respiratory tract of 16% of patients with stable COPD, and RSV in 23.5% [4] . This study confirms that many exacerbations of COPD could be triggered by upper-respiratory tract viral infections [6] . Other strengths of this paper are the broad range of viruses sought and the use of real-time PCR, which is probably the most effective technique to date for the diagnosis of viral infection. Similarly, for viruses of the upper respiratory tract, viral detection does not mean infection. In the study by Seemungal, respiratory viruses were detected in the upper-respiratory tract of several patients with stable COPD [4] . Evaluation of a quantitative real-time PCR for the detection of respiratory syncytial virus in pulmonary diseases	./cache/cord-004535-p4s5uqz8.txt	./txt/cord-004535-p4s5uqz8.txt