Table 4.
Geographic origin of H. pylori strains.
| Continent | Country | Number of strains | Percentage |
|---|---|---|---|
| Europe | 146 | 66.1 | |
| Portugal | 106 | 48.0 | |
| France | 11 | 5.0 | |
| United Kingdom a) | 8 | 3.6 | |
| Germany | 6 | 2.7 | |
| Sweden | 9 | 4.1 | |
| Norway | 6 | 2.7 | |
| Africa | 38 | 17.2 | |
| Portuguese with African origin b) | 20 | 9.0 | |
| Egypt | 7 | 3.2 | |
| Burkina Faso | 11 | 5.0 | |
| America | 27 | 12.2 | |
| USA c) | 1 | 0.5 | |
| Costa Rica | 6 | 2.7 | |
| Mexico | 6 | 2.7 | |
| Argentina | 14 | 6.3 | |
| Asia | 10 | 4.5 | |
| Singapore | 10 | 4.5 | |
| Total | 221 | 100.0 |
a) Includes sequenced strain 26695;
b) Strains isolated from African patients with Portuguese residence were considered African;
c) Includes sequenced strain J99.