The Paul C. Beaver Symposium
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


It has been nearly 4 decades since Paul Beaver and others first identified larvae as the cause of a common disease in children. Our knowledge of the frequency and type of illness produced by ssp. has increased greatly during this time. Although under-recognized and under-reported, toxocaral larva migran is now recognized as a widespread and common human infection. Among helminth infections in developed countries, it is perhaps second in frequency only to pinworm.

Potential etiologic agents of larva migrans syndromes include a wide range of zoonotic helminths. and , the common ascarids of dogs and cats, are incriminated most frequently, at least in temperate climates. This is a result of many factors including the high frequency of pet ownership, the high prevalence of species in dogs and cats, and the long persistence of infective eggs in the environment.

Widespread environmental contamination with eggs, the attraction of children to the animals and their environment, and the play habits of children combine to facilitate human infection with ssp.


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