Incidence of Chlamydia pneumoniae in patients with acute exacerbations of chronic bronchitis
| Location | First author [ref no.] | Year | Diagnostic method | C. pneumoniae |
| Italy | Blasi 72 | 1990–1991 | IFA | 5/142 (4) |
| Italy | Blasi 75 | 2002# | PCR and MIF | 2/34 (6) |
| USA | Beaty 79 | 1987–1988 | MIF | 2/44 (5) |
| Japan | Miyashita 80 | 1993–1996 | MIF | 6/77 (7.8) |
| Spain | Soler 81 | 1998# | Serology (tests not specified) | 7/38 (18) |
| Turkey | Mogulkoc 82 | 1999# | MIF | 11/49 (22) |
| Turkey | Karnak 83 | 2001# | MIF | 13/38 (34) |
| UK | Seemungal 84 | 2002# | PCR | 9/33 (28) |
Data are presented as n/total n (%), unless otherwise stated
IFA: indirect fluorescent antibody
PCR: polymerase chain reaction
MIF: microimmunofluorescence
#: date of publication, period during which specimens were collected and analysed was not specified