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Table 1 Key examples of studies that evaluated the frequency (%) of soil contamination of public areas by roundworm, hookworm and whipworm eggs in different continents

From: Environmental contamination by canine geohelminths

Geographical area Site Frequency (%) Reference
   Roundworms Hookworms Whipworms  
Africa      
Niger Kaduna   9.0   [63]
Americas      
USA Connecticut 14.4    [64]
Argentina Buenos Aires 13.2    [65]
  Buenos Aires 1.7 20.5 2.6 [66]
Brazil Fernandopolis 79.4 6.9   [67]
  Itabuna   47.9   [68]
  São Paulo 29.7    [69]
  Guarulhos, São Paulo 68.1 64.8   [70]
Chile Santiago 66.7    [71]
Venezuela Ciudad Bolívar   61.1   [72]
Asia      
Japan Tokushima 63.3    [73]
Thailand Bangkok 5.7    [74]
Turkey Ankara 45.0    [75]
Europe      
Ireland Dublin 15.0    [76]
Spain Madrid 16.4 3.0   [77]
Italy Marche region 33.6    [78]
  Milan 7.0 3.0 5.0 [79]
  Bari 2.5 1.6 2.5 [80]
  Naples 0.7-1.4 2.4 10.1 [81]
  Messina 3.6 2.6 1.3 [82]
  Alghero 0.5-8.0 4.0 1.9 [83]
Poland Wrocław 3.2 4.9 4.9 [84]
  Warsaw 26.1    [85]
  Kraków 15.6-19.8    [86]
Turkey Erzurum 64.3    [87]
Czech Republic Prague 20.4    [88]
Hungary Eastern and northern areas 24.3-30.1 8.1-13.1 20.4-23.3 [89]
Slovak Republic Bratislava 18.7    [90]