Table 1

Results from PCR for cases identified during 2018 respiratory viral outbreak in Southern Province, Sri Lanka*

Viral targetPassive surveillance n=231Active surveillance n=179Overall n=410
<2 years n=136≥2 and <5 years n=41≥5 years n=40<2 years n=107≥2 and <5 years n=41≥5 years n=29<2 years n=243≥2 and <5 years n=82≥5 years n=69
MonoInfection63 (46.3)20 (48.8)16 (40.0)67 (62.6)25 (61.0)18 (62.1)130 (53.5)45 (54.9)34 (49.3)
Influenza A13 (9.6)8 (19.5)12 (30.0)10 (9.3)12 (29.3)6 (20.7)23 (9.5)20 (24.4)18 (26.1)
Influenza B†3 (2.2)1 (2.4)3 (7.5)0003 (1.2)1 (1.2)3 (4.3)
AdV20 (14.7)4 (9.8)1 (2.5)31 (29.0)11 (26.8)10 (34.5)51 (21.0)15 (18.3)11 (15.9)
RSV27 (19.8)7 (17.1)026 (24.3)2 (4.9)2 (6.9)53 (21.8)9 (11.0)2 (2.9)
CoInfection14 (10.3)5 (12.2)2 (5.0)21 (19.6)6 (14.6)5 (17.2)35 (14.4)11 (13.4)7 (10.1)
Influenza A+AdV1 (0.7)006 (5.6)4 (9.8)3 (10.3)7 (2.9)4 (4.9)3 (4.3)
Influenza A+RSV4 (2.9)2 (4.9)1 (2.5)2 (1.9)1 (2.4)06 (2.5)3 (3.6)1 (1.4)
AdV+RSV6 (4.4)3 (7.3)012 (11.2)1 (2.4)1 (3.4)18 (7.4)4 (4.9)1 (1.4)
Other3 (2.2)01 (2.5)1 (0.9)01 (3.4)4 (1.6)02 (2.9)
Negative55 (40.4)13 (31.7)16 (40.0)19 (17.8)10 (24.4)6 (20.7)74 (30.4)23 (28.0)22 (31.9)
Not tested4 (2.9)3 (7.3)6 (15.0)0004 (1.6)3 (3.6)6 (8.7)
Total positives77 (56.6)25 (61.0)18 (45.0)88 (82.2)31 (75.6)23 (79.3)165 (67.9)56 (68.3)41 (59.4)
  • Frequency (%) are listed in the table by age group.

  • *Age missing for 16 patients.

  • †Testing only performed at Medical Research Institute, the national reference laboratory.

  • AdV, adenovirus; RSV, respiratory syncytial virus.