Composition and characteristics of the large clusters
| Cluster identity | No of members (men) | Age range | No. of diagnosing hospitals | No. of health authority districts | Known ethnic groups | Country of birth | Antimicrobial resistance | Sputum smear positive | Pulmonary disease | Immunosuppressive conditions | Known risk factors | Transmission category |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BA=black African; BC=black Caribbean; ISC=Indian subcontinent; C=Chinese; W=white; Rif=rifampicin; INH=isonazid; PZA=pyrazinamide; STR=streptomycin; ETH=ethambutol. | ||||||||||||
| Transmission categories: A=confirmed link; B=possible link; C=no link identified. | ||||||||||||
| Confirmed links: 1171 (husband and wife and four adjacent postcodes); 4143 (family and social contacts). | ||||||||||||
| 3908 | 12 (7) | 15–76 | 11 | 7 | 8 BA, 1 ISC | 8 Somalia, 1 India | 1 MDR, 4 STR | 3 | 3 | 1 renal disease, 1 diabetes, 1 Down's syndrome | 1 refugee, 1 homeless hostel | B |
| 2066 | 10 (7) | 33–90 | 8 | 7 | 4W, 1 BC, 1 BA, 1 C | 1 UK, 1 China, 1 Nigeria, 1 Ireland | All sensitive | 6 | 8 | 1 lung cancer, 1 diabetes, 1 sarcoidosis (treated with steroids) | 3 alcoholic (inc 1 prison, 1 homeless), 2 difficult to treat | B |
| 905 | 7 (7) | 29–64 | 5 | 3 | 4W, 1 BC | 4 UK | All sensitive | 3 | 5 | 1 diabetes, 1 HIV +ve | 3 alcoholic (inc 1 HIV +ve), 1 homeless, 2 substance abuse, 1 non-compliant | B |
| 4350 | 7 (5) | 22–62 | 5 | 3 | 2W, 1 BA, 1 BC, 1 ISC | 4 UK, 1 Pakistan, 1 Nigeria | All sensitive | 3 | 5 | 2 diabetes | C | |
| 1171 | 6 (3) | 25–72 | 4 | 1 | 2 W, 2 BC | 4 UK | 1 Rif, INH, PZA, STR; 1 Rif, INH, PZA, ETH | 2 | 4 | 1 non-Hodgkin's lymphoma | 1 HIV +ve | A |
| 4143 | 6 (5) | 33–66 | 4 | 4 | 6 W | 2 UK, 1 Ireland | All sensitive | 2 | 6 | 3 alcoholic, 1 HIV +ve | A | |