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The Influence Of Second Intermediate Host Dispersion Pattern Upon The Transmission Of Cercariae Of Echinoparyphium Recurvatum (Digenea: Echinostomatidae), Ann Mccarthy
Ann Marie McCarthy
Transmission of cercariae of the echinostome digenean Echinoparyphium recurvatum was observed in experimental populations of the second intermediate host snail Lymnaea peregra. Populations of 100 snails were distributed among plastic mesh cages in an infection arena to produce different patterns of host dispersion. Cercarial transmission was investigated in host populations showing three separate patterns of host dispersion; Ideal Regular, Random and Contagious ('Clumped'). Levels of cercarial transmission in populations showing each type of dispersion pattern were found to be significantly different. The highest rate of cercarial transmission occurred in the contagiously dispersed host population, and the lowest in the randomly …