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Bulletin No. 16 - Fall 2003
Parasitology- No Category
JAKOVLJEVIC DD.
Some aspects of the epizootiology and economic significance of ascariasis in swine.
Acta Veterinaria, Beograd 25:315-325, 1974
The rate of development of Ascaris suum eggs to the embryonated (infective) stage was found to be directly related to temperature. In suckling pigs infected with 2,000 to 5,000, 10,000 to 15,000 or 50,000 to 70,000 embryonated eggs, the number of worms subsequently found in the intestine were inversely related to the infective dose. The pathological changes in the liver and lungs incr3eased with the infective dose and were more noticeable in the older pigs. A. suum eggs ingested by earthworms were found to be passed unchanged in the feces. The incidence of A. suum on large pig farms in Yugoslavia was 40% in gilts aged 5 to 8 months, 28% in gilts aged 8 to 12 months, 26% in growing pigs aged 70 to 90 days and 2.2% in sows. On small private farms, the incidence was much higher (85.4% in gilts and 39.1% in sows).
