Table 2.
Characteristics of Household Contacts by Bacterial Community Type
| Bacterial Community Type | ||||||
|---|---|---|---|---|---|---|
| Characteristics | 1 | 2 | 3 | 4 | 5 | Missing |
| Influenza A(H3N2) | ||||||
| No. of contacts | 72 | 57 | 69 | 41 | 36 | 11 |
| Age, years | ||||||
| 0–5 | 6/72 (8) | 4/57 (7) | 5/69 (7) | 1/41 (2) | 14/36 (39) | 3/11 (27) |
| 6–17 | 30/72 (42) | 21/57 (37) | 15/69 (22) | 10/41 (24) | 7/36 (19) | 5/11 (45) |
| >17 | 36/72 (50) | 32/57 (56) | 49/69 (71) | 30/41 (73) | 15/36 (42) | 3/11 (27) |
| Male | 29/72 (40) | 17/57 (30) | 21/69 (30) | 18/41 (44) | 16/36 (44) | 5/11 (45) |
| Prior vaccination | 0/72 (0) | 2/57 (4) | 2/69 (3) | 0/41 (0) | 1/36 (3) | 1/11 (9) |
| Infection confirmed | ||||||
| Overall | 11/72 (15) | 8/57 (14) | 13/69 (19) | 1/41 (2) | 8/36 (22) | 2/11 (18) |
| Age 0–5 years | 3/6 (50) | 0/4 (0) | 3/5 (60) | 0/1 (0) | 5/14 (36) | 2/3 (67) |
| Age 6–17 years | 6/30 (20) | 5/21 (24) | 3/15 (20) | 1/10 (10) | 2/7 (29) | 0/5 (0) |
| Age >17 years | 2/36 (6) | 3/32 (9) | 7/49 (14) | 0/30 (0) | 1/15 (7) | 0/3 (0) |
| Symptom profile | ||||||
| Fever | 5/11 (45) | 4/8 (50) | 4/13 (31) | 1/1 (100) | 5/8 (62) | 0/2 (0) |
| Rhinorrhea | 4/11 (36) | 7/8 (88) | 6/13 (46) | 1/1 (100) | 6/8 (75) | 0/2 (0) |
| Sore throat | 4/11 (36) | 4/8 (50) | 5/13 (38) | 0/1 (0) | 2/8 (25) | 0/2 (0) |
| Cough | 5/11 (45) | 7/8 (88) | 8/13 (62) | 1/1 (100) | 5/8 (62) | 0/2 (0) |
| ILIa | 4/11 (36) | 4/8 (50) | 4/13 (31) | 1/1 (100) | 4/8 (50) | 0/2 (0) |
| Influenza B | ||||||
| No. of contacts | 36 | 38 | 30 | 23 | 14 | 9 |
| Age, years | ||||||
| 0–5 | 2/36 (6) | 8/38 (21) | 0/30 (0) | 0/23 (0) | 5/14 (36) | 4/9 (44) |
| 6–17 | 10/36 (28) | 12/38 (32) | 12/30 (40) | 5/23 (22) | 4/14 (29) | 2/9 (22) |
| >17 | 24/36 (67) | 18/38 (47) | 18/30 (60) | 18/23 (78) | 5/14 (36) | 3/9 (33) |
| Male | 13/36 (36) | 14/37 (37) | 9/30 (30) | 12/23 (52) | 6/14 (43) | 4/9 (44) |
| Prior vaccination | 7/36 (19) | 3/37 (8) | 5/30 (17) | 1/23 (4) | 2/14 (14) | 0/9 (0) |
| Infection confirmed | ||||||
| Overall | 10/36 (28) | 8/38 (21) | 5/30 (17) | 4/23 (17) | 1/14 (7) | 4/9 (44) |
| Age 0–5 years | 2/2 (100) | 4/8 (50) | NA | NA | 0/5 (0) | 2/4 (50) |
| Age 6–17 years | 3/10 (30) | 3/12 (25) | 5/12 (42) | 3/5 (60) | 1/4 (25) | 1/2 (50) |
| Age >17 years | 5/24 (21) | 1/18 (6) | 0/18 (0) | 1/18 (6) | 0/5 (0) | 1/3 (33) |
| Symptom profile | ||||||
| Fever | 5/10 (50) | 4/8 (50) | 4/5 (80) | 4/4 (100) | 1/1 (100) | 4/4 (100) |
| Rhinorrhea | 7/10 (70) | 5/8 (62) | 3/5 (60) | 2/4 (50) | 0/1 (0) | 3/4 (75) |
| Sore throat | 3/10 (30) | 4/8 (50) | 3/5 (60) | 3/4 (75) | 1/1 (100) | 0/4 (0) |
| Cough | 5/10 (50) | 6/8 (75) | 3/5 (60) | 2/4 (50) | 1/1 (100) | 1/4 (25) |
| ILIa | 3/10 (30) | 4/8 (50) | 3/5 (60) | 3/4 (75) | 1/1 (100) | 1/4 (25) |
Data are presented as n/N (%) unless otherwise indicated. Abbreviations: ILI, influenza-like illness; NA, not applicable.
aFever with sore throat or cough.