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Interspecific effects between Moniliformis (Acanthocephala), Hymenolepis (Cestoda) and Nippostrongylus (Nematoda) in the laboratory rat

  • Celia Holland (a1)

Rats harbouring 35-day-old primary infections of Moniliformis moniliformis and Hymenolepis diminuta were inoculated with equal doses of Nippostrongylus brasiliensis and were autopsied 10 days later. Significant reductions were found in the dry weight of Moniliformis and Hymenolepis and in the numbers of Nippostrongylus recovered compared with single infections. Similarly, in infections with two parasites, the numbers of Nippostrongylus were reduced when concurrent with Moniliformis and the dry weights of Moniliformis and Hymenolepis decreased in the presence of each other. A comparison of the concurrent infections themselves revealed that Moniliformis weighed significantly less in the presence of Hymenolepis than in the three parasite infections. Parasite interactions and their possible mechanism are discussed and comparisons are made with the relevant single infection for each parasite.

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