Table 4.
Subgroup meta-analysis of field studies reporting pool prevalence Dirofilaria immitis infected/infective rates in vectors grouped by country.
| Minimum infected ratea | Minimum infective rateb | ||||||
|---|---|---|---|---|---|---|---|
| Variable | Pool size | Positive pool | Overall prevalence (95% CI) | I2c | Positive pool | Overall prevalence (95% CI) | I2 |
| Global | 124,480 | 1,071 | 21.9 (14-31.2) | 98.6 | 235 | 2.6 (1-4.8) | 94.4 |
| PAHO | 18,690 | 451 | 32.4 (13.3-59) | 98.2 | 101 | 3.8 (0.1-11.1) | 95.3 |
| Argentina | 2,462 | 5 | 0 (0-1.4) | 99.9 | 0 | 0 (0-0.3) | 99.8 |
| Brazil | 3,988 | 56 | 13.2 (9.8-17.1) | 99.9 | 8 | 1.4 (0.3-3) | 99.8 |
| Mexico | 867 | 32 | 25 (15.4-36.8) | 99.9 | 21 | 9.4 (3.7-17.3) | 99.8 |
| USA | 11,373 | 358 | 57.9 (8.1-146.5) | 99 | 72 | 4 (0-23.4) | 96.8 |
| EURO | 57,717 | 240 | 14.8 (5-28.7) | 97.2 | 71 | 2.2 (0.1-6.2) | 92.9 |
| Italy | 3,808 | 121 | 30.3 (3.1-80.6) | 97.7 | 30 | 6.3 (0-20.8) | 91.9 |
| Portugal | 2,389 | 58 | 23.1 (17.4-29.6) | 99.5 | 25 | 10 (6.3-14.5) | 98.4 |
| Slovakia | 187 | 4 | 14.7 (0.9-39.4) | 99.5 | 0 | 0 (0-10.2) | 98.4 |
| Spain | 2,825 | 4 | 1.3 (0.2-3.2) | 0 | 1 | 0.1 (0-1.3) | 0 |
| Turkey | 613 | 17 | 24.5 (12.7-39.3) | 5.1 | 15 | 21.4 (10.4-35.5) | 34.2 |
| Czech | 237 | 0 | 0 (0-15.4) | 0 | 0 | 0 (0-15.4) | 0 |
| France | 797 | 29 | 36.4 (24.5-51.8) | – | 0 | 0 (0-4.6) | – |
| Germany | 955 | 2 | 2.1 (0.3-7.5) | – | 0 | 0 (0-3.9) | – |
| Russia | 78 | 5 | 64.1 (21.2-143) | – | 0 | 0 (0-46.2) | – |
| Australia | 2,389 | 0 | 0 (0-0.1) | – | 0 | 0 (0-0.1) | – |
| EMRO | 190 | 15 | 78.9 (44.9-126.9) | – | 10 | 52.6 (25.5-94.7) | – |
| Iran | 190 | 15 | 78.9 (44.9-126.9) | – | 10 | 52.6 (25.5-94.7) | – |
| WPRO | 47,883 | 365 | 25.6 (6.1-57.4) | 98.9 | 53 | 0.3 (0-2.0) | 81.2 |
| French Polynesia | 1,194 | 28 | 23.5 (15.6-33.7) | – | 4 | 3.4 (0.9-8.6) | – |
| Samoa | 41,980 | 179 | 4.3 (3.7-4.9) | – | 49 | 1.2 (0.9-1.5) | – |
| Taiwan | 4,537 | 146 | 32.2 (27.2-37.7) | – | 0 | 0 (0.0-0.8) | – |
| South-Korea | 172 | 12 | 69.8 (36.6-118.7) | – | 0 | 0 (0.0-21.2) | – |
Notes: a,bThe result presents as a case per 1,000; cheterogenicity index.