In nematodes the larva 3 acts as an infectious stage. In general these stages are ingested with food, while being attached at plants. These stages are mostly surrounded by a sheath (Fig. 1). However, the larvae 3 of Strongyloides are not sheathed when entering their hosts.
Diagrammatic representation of the posterior regions of different infectious larvae 3 of nematodes of sheep. A Strongyloides papillosus; B Trichostrongylus sp. C Ostertagia sp. D Cooperia sp. E Haemonchus sp. F Bunostomum sp. G Oesophagostomum sp. H Chabertia sp. I Nematodirus sp. S tail, SH sheath
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© 2016 Springer-Verlag Berlin Heidelberg
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Mehlhorn, H. (2016). Infectious Larvae of Nematodes. In: Mehlhorn, H. (eds) Encyclopedia of Parasitology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-43978-4_3968
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