TABLE 1.

Giardia duodenalis infection rates and genotypes in humans in developed countries

Location(s)Total no. of samplesInfection rate (%)No. of samples genotypedNo. of samples with assemblage: Reference
ABOther(s)
Europe1,6587149302 (C), 4 (D), 4 (E), 4 (F) 247
Belgium3734.072a1854 93
France25916 31
Germany2021.533 227
Italy1442.966 168
Italy1,9890.411b 551 (A + B) 58
Italy30246 39
Italy3717155 (A + B) 148
Italy, Africa612833 37
Netherlands983464 282
Netherlands8922.01899 117
Norway2121 223
Norway63360 218
Portugal1903.777 10
Portugal2525 245
Spain10843614 (A + B) 228
United Kingdom339213 (A + B) 14
United Kingdom199481456 (A + B) 35
Canada66 283
Canada5228.915393 (A + B) 106
United States1414 283
United States22 249
Japan321 2
South Korea55 304
Australia826 214
Australia12111 (A + B) 118
Australia3537.623716 213
Australia1243193 299
New Zealand30237 294
New Zealand667.6514 152
Total2,7221,0961,58937
  • a Including positive samples from other sources.

  • b Multiple samples were collected from each patient.