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Table 3 Microbiological diagnosis

From: Seasonal burden of severe influenza virus infection in the critically ill patients, using the Assistance Publique-Hôpitaux de Paris clinical data warehouse: a pilot study

Variable All participants
n = 320
Survivors
n = 257
Non-survivors
n = 63
Virus sampling
 Nasopharyngeal swab 249 (77.8) 203 (79.0) 46 (73.0)
 Nasopharyngeal aspirate 10 (3.1) 7 (2.7) 3 (4.8)
 Sputum 14 (4.4) 10 (3.9) 4 (6.3)
 Bronchial aspirate 31 (9.7) 23 (8.9) 8 (12.7)
Influenza virus type and subtype identified in patients with at least one positive test n = 196 n = 155 n = 41
Virus Aa 78 (39.8) 59 (38.1) 19 (46.3)
A/H3N2a 10 (5.1) 6 (3.9) 4 (9.8)
A/H1N1pdma 68 (34.7) 53 (32.2) 15 (36.6)
Virus Ba 120 (61.2) 96 (61.9) 24 (58.6)
  1. aPositive tests are reported as counts and percentages in patients with at least one positive test