Pathogens which are more common as a cause of community acquired pneumonia in certain geographical regions
| Pathogen | Geographical area | References |
| Legionella spp | Countries bordering the Mediterranean Sea | 27[II], 378[II] |
| Coxiella burnetii | North-west Spain | 389[II] |
| Coxiella burnetii | Canada | 390[II] |
| Klebsiella pneumoniae | South Africa | 391[II], 392[II] |
| Burkholderia pseudomallei | South-east Asia and northern Australia | 93[II], 393[II], 394[II], 395[II] |
| Gram-negative enteric bacilli | Italy | 379[II] |
| Mycobacterium tuberculosis | Non-industrialised countries | 93[II], 94[II] |