Diagnosis and Control of Ascariasis in Pigs - Ascaris: The Neglected Parasite - page 380

TABLE 16.1 Results of epidemiological studies show that infections with A. suum in pigs remain highly prevalent throughout the world. Farms
were considered infected when pigs on the farms were found positive for A. suum infection after examination

% Infected pigs

Year Country Sample size and type % Infected farms Egg D Worm D Liver D Reference

1966 Sweden 200 sows 34% a

1974 Canada 90 pigs 39% b

1976 The Netherlands 653,540 pigs 16% c

1980 Canada 2500 pigs 37% 46% d

1980 Canada 2500 pigs 44%

1980 England 468 pigs 16% e

1989 Denmark 66 farms 88% 30% f

1990 Nigeria 1000 pigs, 2 areas 53 & 10% g

1990 Canada 15 herds 32% 35% 82% 41

1993 Zimbabwe 7128 pigs 17% h

1997 Belgium 20,758 livers 36% i

1997 Canada 2500 pigs 44% 25

1997 Canada 500 pigs 18% 50%