Groups of serious bacterial infections including numbers of medical codes and five most frequently recorded conditions
| Group | No of codes | No of first events | Five most frequent conditions (no of first events 2002–2017) |
| CNS infection | 30 | 576 | Epidural abscess (117), cerebral abscess (112), brain abscess (79), intraspinal abscess (49), drainage of abscess of subdural space (44) |
| CVS infection | 24 | 1697 | Acute and subacute endocarditis (594), bacterial endocarditis (276), subacute bacterial endocarditis (270), acute endocarditis NOS (166), acute bacterial endocarditis (114) |
| Kidney infection | 22 | 30 827 | Acute pyelonephritis (19 284), pyelonephritis unspecified (7115), infections of kidney (1670), acute pyelitis (1008), pyelitis unspecified (745) |
| Lung abscess/empyema | 24 | 2932 | Empyema (2314), abscess of lung (149), abscess of lung and mediastinum (139), thorax abscess NOS (68), pleural empyema (56) |
| Mastoiditis | 10 | 1970 | Mastoiditis and related conditions (1293), mastoiditis NOS (487), acute mastoiditis (146), acute mastoiditis NOS (31), abscess of mastoid27 |
| Osteomyelitis | 65 | 4921 | Acute osteomyelitis (3297), unspecified osteomyelitis (678), unspecified osteomyelitis of unspecified site (284), osteomyelitis jaw (78), unspecified osteomyelitis NOS (75) |
| Peritonsillar abscess | 6 | 11 338 | Quinsy (8611), peritonsillar abscess—quinsy (1748), O/E quinsy present (654), drainage of peritonsillar abscess (232), drainage of quinsy (226) |
| Resistant infections and Clostridium difficile | 31 | 42 185 | C. difficile toxin detection (20 175), methicillin-resistant Staphylococcus aureus positive (9914), C.difficile infection (6397), methicillin-resistant S.aureus (4303), methicillin-resistant S. aureus carrier (1017) |
| Sepsis | 100 | 39 059 | Sepsis (23 149), septicaemia (6204), urosepsis (4646), biliary sepsis (1233), C.infection (576) |
| Septic arthritis | 41 | 4254 | Septic arthritis (3649), pyogenic arthritis (184), arthropathy associated with infections (172), knee pyogenic arthritis (52), staphylococcal arthritis and polyarthritis (39) |
Figures are frequencies.
CNS, central nervous system; CVS, cardiovascular system; NOS, not otherwise specified.