NOTES ON THE DEVELOPMENT OF METACERCARIA AND ADULT OF ECHINOSTOMA-PORTERI FASHUYI (ECHINOSTOMATIDAE)

  • 1 January 1984
    • journal article
    • research article
    • Vol. 31  (2) , 113-119
Abstract
The metacercaria of E. porteri retained its viability for a longer time in Bulinus (Physopsis) globosus than in Bulinus (Bulinus) forskalii (Eharenberg) and Lymnaea natalensis which is the natural host for other larval stages. It becomes infective to definitive hosts about 6 h after commencement of encystment and loses its viability after 14 days in the snail host. Development of adult takes place experimentally in chicks, pigeons and rats, but hosts show age resistance to infection. Growth of adult worm is most rapid between 4th-6th day and declines after the 17th day. Proportionate increase in body length was higher than similar increases in size of other parts of the body.

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