Table 2. Frequencies of Chlamydiae and mycoplasma detected in pulmonary lymphomas and controls from different geographical areasa.
| Diagnosis | UK | Germany | Italy | Total | ||||
|---|---|---|---|---|---|---|---|---|
| Chlamydia pneumoniae | ||||||||
| MALT L | 2/35 | 6% | 3/21 | 14% | 3/13 | 23% | 8/69 | 12% |
| Other-LPD | — | — | 4/20 | 20% | 1/10 | 10% | 5/30 | 17% |
| Non-LPD | 1/20 | 5% | 2/24 | 8% | — | — | 3/44 | 7% |
| Chlamydia trachomatis | ||||||||
| MALT L | 8/35 | 23% | 4/21 | 19% | 2/13 | 15% | 14/69 | 20% |
| Other-LPD | — | — | 1/20 | 5% | 2/10 | 20% | 3/30 | 10% |
| Non-LPD | 4/20 | 20% | 1/24 | 4% | — | — | 5/44 | 11% |
| Chlamydia psittaci | ||||||||
| MALT L | 2/35 | 6% | 1/21 | 5% | 1/13 | 8% | 4/69 | 6% |
| Other-LPD | — | — | 0/20 | 0% | 0/10 | 0% | 0/30 | 0% |
| Non-LPD | 0/20 | 0% | 0/24 | 0% | — | — | 0/44 | 0% |
| Mycoplasma pneumoniae | ||||||||
| MALT L | 0/35 | 0% | 0/21 | 0% | 0/13 | 0% | 0/69 | 0% |
| Other-LPD | — | — | 0/20 | 0% | 0/10 | 0% | 0/30 | 0% |
| Non-LPD | 0/20 | 0% | 0/24 | 0% | — | — | 0/44 | 0% |
LPD=lymphoproliferative disorder; MALT L=mucosa-associated lymphoid tissue lymphoma.
a
A case was regarded as positive if the screened bacterium was detected in at least two of three independent PCRs (Chanudet et al, 2006).