Encyclopedia of Parasitology

2016 Edition
| Editors: Heinz Mehlhorn

Ollulanus Species

  • Heinz Mehlhorn
Reference work entry
DOI: https://doi.org/10.1007/978-3-662-43978-4_2198
  1. 1.

    Name: Latin: ollula = small cups; tri = three; cuspis = spike, thorn; sus = pig; Skrjabin = Russian helminthologist. Eng-lish: stomach worms.

  2. 2.

    Geographic distribution/epidemiology: Worldwide in foxes and cats (= O. tric-uspis), pigs (= O. suis, O. skrjabini).

  3. 3.

    Morphology/life cycle: The adult Ollulanus worms are very small and reach mostly only a length of about 1 mm. They live in the mucous layer of the stomach where females give birth to motile larvae 3, which are set free occasionally by vomiting or reach maturity still in the same host.

  4. 4.

    Symptoms of disease (Ollulanosis): Vomiting, gastritis, loss of appetite and of weight, weakness.

  5. 5.
    Diagnosis: Microscopical demonstration of adult or larval worm stages in vomited material or within endoscopically obtained wall material of the stomach. In case of diarrheas, larvae may also occur in feces. Vomiting may be introduced by oral application of emetics (Figs. 1 and 2).
    Ollulanus Species, Fig. 1

    Diagrammatic representation of a female of Ollulanus tricuspis (after Soulsby). D intestine, EL egg with larva formation, H terminal three-spiked structure, L3 larva 3 in the egg inside the uterus, OE esophagus, opening of the uterus, UT uterus

    Ollulanus Species, Fig. 2

    Light micrograph of a young female worm

  6. 6.

    Infection: Oral uptake of own or foreign vomited material containing larvae 3, which reach maturity in the stomach.

  7. 7.

    Prophylaxis: Quick removement of vomited material especially in elevation facilities with numerous animals.

  8. 8.

    Incubation period: A few days in case of massive infections.

  9. 9.

    Prepatent period: About 5 weeks in cases of infections with larvae 3; in cases of ingestion of adult worms, 2–3 days.

  10. 10.

    Patency: Years due to repeated self-infections.

  11. 11.

    Therapy: Use of levamisole (5 days 5 mg/kg bodyweight subcutaneously) or use of benzimidazoles (e.g., fenbendazole 2 × 10 mg/kg bodyweight).


Further Readings

  1. Cecchi R et al (2006) Demonstration of Ollulanus tricuspis in the stomach of domestic cats in biopsy. J Comp Path 134:374–377CrossRefPubMedGoogle Scholar
  2. Schuster RK et al (2009) The parasite fauna of stray domestic cats (Felis catus) in Dubai, United Arab Emirates. Parasitol Res 105:125–134CrossRefPubMedGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Institut für ZoomorphologieZellbiologie und Parasitologie, Heinrich-Heine-UniversitätDüsseldorfGermany