Penetration of ovicidal fungi into altered eggs of Ascaris lumbricoides.

Eggs of Ascaris lumbricoides exposed to temperatures of 40--60 degrees C for 1 hour or irradiated by high doses of UV light are more massively attacked by ovicidal fungi than the intact eggs. The authors assume that the more rapid and increased effect of ovicidal fungi in the soils of the tropics and subtropics is due to greater insolation of the surface layers and their higher temperature.