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Chemotactic and temperature-dependent responses of the Strongyloidoidea superfamily of nematodes

Published online by Cambridge University Press:  05 October 2021

Alex Dulovic Open the ORCID record for Alex Dulovic [Opens in a new window] ,
Mat Norman ,
Dorothee Harbecke  and
Adrian Streit Open the ORCID record for Adrian Streit [Opens in a new window]
Alex Dulovic*
Affiliation:
Max Planck Institute for Developmental Biology, Tübingen, Baden Württemberg, Germany NMI Natural and Medical Sciences Institute at the University of Tübingen, Tübingen, Baden Württemberg, Germany
Mat Norman
Affiliation:
Max Planck Institute for Developmental Biology, Tübingen, Baden Württemberg, Germany UBC Faculty of Medicine, Vancouver, British Columbia, Canada
Dorothee Harbecke
Affiliation:
Max Planck Institute for Developmental Biology, Tübingen, Baden Württemberg, Germany
Adrian Streit
Affiliation:
Max Planck Institute for Developmental Biology, Tübingen, Baden Württemberg, Germany
*
Author for correspondence: Alex Dulovic, E-mail: alex.dulovic@nmi.de
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Abstract

Host-seeking behaviour and how a parasite identifies the correct host to infect remains a poorly understood area of parasitology. What is currently known is that host sensation and seeking behaviour is formed from a complex mixture of chemo-, thermo- and mechanosensory behaviours, of which chemosensation is the best studied. Previous studies of olfaction in parasitic nematodes suggested that this behaviour appears to be more closely related to target host and infection mode than phylogeny. However, there has not yet been a study comparing the chemotactic and temperature-dependent behaviours of very closely related parasitic and non-parasitic nematodes. To this end, we examined the temperature-dependent and chemotactic responses of the Strongyloidoidea superfamily of nematodes. We found differences in temperature response between the different species and within infective larvae. Chemotactic responses were highly divergent, with different attraction profiles between all species studied. When examining direct stimulation with fur, we found that it was insufficient to cause an attractive response. Overall, our results support the notion that olfactory sensation is more closely related to lifestyle and host range than phylogeny, and that multiple cues are required to initiate host-seeking behaviour.

Keywords

Chemotaxishost-seeking behaviourparasitic nematodesParastrongyloides trichosuriRhabditophanes diutinusStrongyloides
Type
Research Article
Information
Parasitology , Volume 149 , Issue 1 , January 2022 , pp. 116 - 123
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Copyright
Copyright © Max-Planck Institute for Developmental Biology at Tübingen, 2021. Published by Cambridge University Press

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