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Am. J. Trop. Med. Hyg., 27(6), 1978, pp. 1195-1202
Copyright © 1978 by The American Society of Tropical Medicine and Hygiene

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Discrimination of the Larval Stages of Echinococcus Oligarthrus (Diesing, 1863) and E. Vogeli Rausch and Bernstein, 1972 (Cestoda: Taeniidae)*

R. L. Rausch, V. R. Rausch AND A. D'Alessandro
Division of Animal Medicine, SB-42, and Department of Pathobiology, University of Washington, Seattle, Washington 98195, and Tulane University—International Center for Medical Research, Apartado Aereo 5390, Cali, Colombia

Rostellar hooks of protoscolices from known larval stages of Echinococcus oligarthrus (Diesing, 1863) and E. vogeli Rausch and Bernstein, 1972 were compared to determine whether morphologic differences could be defined. The large and small hooks, respectively, of the two species were found to differ significantly in length (P = <0.0001) as well as in relative proportions. Host-related variation in lengths of hooks was not observed. Dimensions of the rostellar hooks were found to provide means for the discrimination of the larval stages of E. oligarthrus and E. vogeli, of which the latter is the cause of polycystic hydatid disease in man in South and Central America. The defined criteria were used in the identification of larvae from wild rodents and man.

Accepted for publication April 29, 1978.


* Supported in part by the Tulane University—COLCIENCIAS International Center for Medical Research, Grant AI-10050 from the National Institute of Allergy and Infectious Diseases, National Institutes of Health, U.S. Public Health Service.




This article has been cited by other articles:


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A. D'Alessandro and R. L. Rausch
New Aspects of Neotropical Polycystic (Echinococcus vogeli) and Unicystic (Echinococcus oligarthrus) Echinococcosis
Clin. Microbiol. Rev., April 1, 2008; 21(2): 380 - 401.
[Abstract] [Full Text] [PDF]


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Copyright © 1978 by the American Society of Tropical Medicine and Hygiene.