Encyclopedia of Parasitology

Living Edition
| Editors: Heinz Mehlhorn

Metastrongylus Species of Pigs

  • Heinz Mehlhorn
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27769-6_4061-1


Greek: meta = behind; strongylos = round, cylindric. English: Pig lung worm.

Geographic Distribution/Epidemiology


Morphology/Life Cycle

In Europe, four species of the genus Metastrongylus are described in pigs ( M. confusus, M. elongatus, M. pudendotectus, M. salmi). Species differentiation just by morphology is very difficult; however, this is not needed for a successful therapy or for other control measurements. The males reach a length of 1.5–2.5 cm, while the females grow up to a length ranging between 2.5 and 5.5 cm. Males and females live together in nodules inside the small and midsized bronchial cavities. The development involves intermediate host after the females have excreted the thick-shelled eggs that measure about 55 × 40 μm (Fig. 1) and contain already the larva 1. If an intermediate host (e.g., earthworms, several annelids) has ingested such an embryonated egg, the larva hatches and via two molts, the infectious larval stage is reached (Fig. 2). If pigs...


Larval Stage Oral Uptake Serological Test Intermediate Host Microscopical Determination 
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Further Reading

  1. Da Silva D, Müller G (2013) Parasites in the respiratory tract of Sus scrofa and its relationship with Ascaris suum. Parasitol Res 112:1353–1356CrossRefPubMedGoogle Scholar
  2. Marruchella G et al (2012) Fatal bronchopneumonia in a Metastrongylus elongatus and porcine circovirus type 2 co-infected pig. Res Vet Sci 93:310–312CrossRefPubMedGoogle Scholar
  3. Yoon BI et al (2010) Lung worm (Metastrongylus elongatus in wild boars (Sus scrofa) of the demilitarized zone of Korea. J Wildl Dis 46:1042–1054CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

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