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第15号公告板 - Summer 2003
Parasitology- No Category
ROEPSTORFF A.
Ascaris suum eradication?
Pig Progress, June 2003: 16-17
A. suum is often the last parasite infecting pigs in intensive production systems. It is still debated how to eradicate this parasite using optimal deworming programs. Ascaris was present in a few animals in some herds in which worms were never found in fatteners or sows. Ascaris may be reduced to negligible levels or even eradicated by optimal hygiene and appropriate pen design that increases desiccation and thereby mortality of the eggs. In such lightly infected herds Ascaris does not usually constitute a problem and eradication may therefore not be cost-effective. Herds that would benefit markedly from Ascaris eradication are the heavily infected herds, but in such herds drug treatment programs without improved hygiene standards presumably have to be extremely intensive and long-lasting, and if successful at all, the herds will be very susceptible to reinfection due to the presence of microhabitats favorable for egg survival.
