Table 1. Features of outbreak group A Streptococcus type emm66 cases, England and Wales, 5 January–29 December 2016 (n = 27).
| Total cases | n |
|---|---|
| Demographics and risk factorsa | |
| Male | 22 |
| Median age (range) in years | 38 (29–56) |
| Homeless at time of illness onset | 20 |
| Street homeless at time of illness onset | 13 |
| People who inject drugs | 20 |
| Problematic alcohol use | 6 |
| Initial clinical presentation | |
| Abscess | 7 |
| Injection site infection | 6 |
| Septic arthritis | 3 |
| Bacteraemia | 3 |
| Muscle or deep tissue infection | 3 |
| Cellulitis | 2 |
| Unspecified soft tissue infection | 1 |
| Necrotising fasciitis | 1 |
| Pneumonia | 1 |
| Diagnosis, outcomes and co-infectiona | |
| Invasive GAS infection | 20 |
| Non-invasive GAS infection (including three severe infections) | 7 |
| Hospitalisation | 21 |
| Amputation | 1 |
| Died due to GAS infection | 1 |
| Previously tested positive for hepatitis C | 15 |
| Previously tested positive for hepatitis B | 1 |
GAS: group A Streptococcus.
a More than one answer could be chosen.