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Interspecific Interactions between Hymenolepis microstoma (Cestoda) and Heligmosomoides polygyrus (Nematoda) in Mice

Charles H. Courtney and Donald J. Forrester
The Journal of Parasitology
Vol. 59, No. 3 (Jun., 1973), pp. 480-483
DOI: 10.2307/3278778
Stable URL: http://www.jstor.org/stable/3278778
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Interspecific Interactions between Hymenolepis microstoma (Cestoda) and Heligmosomoides polygyrus (Nematoda) in Mice
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Abstract

Greater weight yields of Hymenolepis microstoma (Dujardin, 1845) were recovered from mice concurrently infected with Heligmosomoides polygyrus (Dujardin, 1845) (= Nematospiroides dubius Baylis, 1926) than in mice infected with the tapeworm only. This was true regardless of whether H. microstoma infections were initiated 3 weeks before or 2 weeks after the mice were infected with H. polygyrus. This effect was also characterized by an increase in the total weight of tapeworm tissue occupying the first 50 mm of lumen posterior to the duodenal papilla. Heligmosomoides polygyrus occurred in lower numbers in concurrent infections than in control infections only when the nematode infection was established 3 weeks after the mice were infected with H. microstoma. However, in both types of concurrent infections a greater percentage of the total burden of H. polygyrus was located anterior to the duodenal papilla than in mice infected with the nematode only.

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