Encyclopedia of Parasitology

Living Edition
| Editors: Heinz Mehlhorn

Hymenelopis nana

  • Heinz Mehlhorn
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27769-6_3953-1

Name

Greek: hymen = thin portion of skin; lepis = scale. Latin: nanus = dwarf. English: dwarf tapeworm.

Geographic Distribution/Epidemiology

Worldwide, especially in the subtropics and tropics, about 80 millions of humans are infected. It is probably the most common tapeworm of humans (especially of children).

Morphology/Life Cycle

H. nana parasitizes in humans, mice, and rats and reaches mostly only a length of 5 cm and a width of 1–2 mm (Figs. 1 and 2). The scolex has a diameter of 0.3 mm, is provided with four suckers, and bears a protrudable spherical rostellum, which is armed by 20–24 hooks (Fig. 2), which are tiny, reaching a length of 140–180 μm. Mature proglottids are often already destroyed in the intestine of their hosts, so that the characteristic eggs (40–60 μm × 30–50 μm) are mostly found in the feces (Fig. 2). The further life cycle is diagrammatically depicted in Fig. 1.

Keywords

Oral Uptake Healthy Person Microscopical Determination Abdominal Cramp Blood Eosinophilia 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Further Reading

  1. Becker B et al (1980) Scanning and transmission electron microscope studies on the efficacy of praziquantel on Hymenolepis nana in vitro. Parasitol Res 61:121–133Google Scholar
  2. Becker B et al (1981) Ultrastructural investigations on the effects of praziquantel on the tegument of 5 species of cestodes. Parasitol Res 64:257–269Google Scholar
  3. Li B et al (2012) Mebendazole in the treatment of Hymenolepis nana infections in the captive ring-tailed lemur (Lemur catta), China. Parasitol Res 111:935–937CrossRefPubMedGoogle Scholar
  4. Mehlhorn H et al (1981) On the nature of proglottids in cestodes. Parasitol Res 65:243–259Google Scholar
  5. Steinmann P et al (2012) FLOTAC for the diagnosis of Hymenolepis spp. infection: proof-of-concept and comparing diagnostic accuracy. Parasitol Res 111:749–754CrossRefPubMedGoogle Scholar
  6. Zumaquero-Rios JL et al (2013) Fascioliasis and intestinal parasitoses affecting schoolchildren in Atlixco, Puebla State, Mexico: epidemiology and treatment with nitazoxanide. PLoS Negl Trop Dis. doi:10.1371/journal.pntd.0002553PubMedPubMedCentralGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Institut für Zoomorphologie, Zellbiologie und ParasitologieHeinrich-Heine-UniversitätDüsseldorfGermany