Table 1.
Characteristics of the 344 laboratory-confirmed cases of invasive listeriosis observed in Poland between 1997 and 2013.
| Category | PCR-Serogroup | CFR%d (ne) | Total (%) | ||||
|---|---|---|---|---|---|---|---|
| Lineage I | Lineage II | ||||||
| IVb | IIb | IIa | IIc | ||||
| Total | 192 | 28 | 118 | 6 | 40 (175) | 344 (100) | |
| Gender | male | 125 | 21 | 69 | 2 | 43.3 (113) | 217 (63.1) |
| female | 65 | 6 | 47 | 4 | 34.4 (61) | 122 (35.5) | |
| unknown | 2 | 1 | 2 | 0 | 0.0 (1) | 5 (1.4) | |
| Age (years) | newborns | 23 | 4 | 10 | 1 | 46.7 (15) | 38 (11.0) |
| 1/12mo–4 y | 5 | 1 | 5 | 0 | 0.0 (3) | 11 (3.2) | |
| 5–24 | 4 | 1 | 2 | 0 | 25.0 (4) | 7 (2.0) | |
| 25–44 | 17 | 7 | 10 | 0 | 25.0 (16) | 34 (9.9) | |
| 45–64 | 79 | 5 | 39 | 1 | 28.8 (66) | 124 (36.0) | |
| ≥65 | 61 | 10 | 50 | 3 | 55.7 (70) | 124 (36.0) | |
| unknown | 3 | 0 | 2 | 1 | 0.0 (1) | 6 (1.9) | |
| Clinical material | cerebrospinal fluid | 106 | 12 | 51 | 1 | 26.4 (72) | 170 (49.4) |
| blood | 83 | 16 | 64 | 5 | 48.9 (98) | 168 (48.8) | |
| othera | 3 | 0 | 3 | 0 | 60.0 (5) | 6 (1.8) | |
| Clinical presentation | meningitis | 119 | 13 | 58 | 2 | 34.9 (83) | 192 (55.8) |
| BSIb | 73 | 15 | 60 | 4 | 47.1 (87) | 152 (44.2) | |
| Pregnancy associatedc | 24 | 4 | 11 | 1 | 43.8 (16) | 40 (100) | |
| CFR§ (¶) | 38.9 (95) | 57.1 (7) | 38.6 (70) | 66.7 (3) | 40 (175) | ||
n, Number of isolates. aRectal swab from newborn with listeriosis, sample of the retroperitoneal space and cecum tumor, pleural fluid and peritoneal fluid. bBSI, blood stream infections. cThese cases are also counted in clinical presentation (four isolates were from mother-child pair). dCFR, the overall case fatality ratio (%) was calculated taking into account only cases with known outcome. eNumber of cases with known outcome.