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Survival of Cysts of Echinococcus granulosus after Transplant into Homologous and Heterologous Hosts
V. M. Varela-Díaz, J. F. Williams, E. A. Coltorti and C. S. F. Williams
The Journal of Parasitology
Vol. 60, No. 4 (Aug., 1974), pp. 608-612
Stable URL: http://www.jstor.org/stable/3278718
Page Count: 5
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Cysts of Echinococcus granulosus were found to survive after transplantation into homologous and heterologous species of hosts. No alterations in the shape of transplanted cysts were observed. Although no increase in cyst size was evident 100 days after implantation, the rates of growth and development to fertility were variable in both homologous and heterologous hosts a year later. Protoscoleces from transplanted cysts produced secondary echinococcosis when inoculated intraperitoneally into homologous hosts. Hydatid cysts became either misshapen or enveloped in a chronic fibrous tissue response when recipient mice were immunized with donor gerbil serum in Complete Freund's Adjuvant (CFA). Identical changes occurred in control animals given CFA alone. These results are discussed in terms of the, current concepts of the mechanisms of prolonged survival of parasites in immunologically competent hosts.
The Journal of Parasitology © 1974 The American Society of Parasitologists