Navigation within host tissues: cercariae orientate towards dark after penetration
- 1 June 2004
- journal article
- Published by Springer Science and Business Media LLC in Zeitschrift für Parasitenkunde
- Vol. 93 (2), 111-113
- https://doi.org/10.1007/s00436-003-1045-9
Abstract
The survival of skin penetrating cercariae depends on information on the direction to move toward deeper layers in the epidermis (the direction of further migration) and toward the surface (direction which must be avoided when migrating). We tested the hypothesis that parasites can use their photo-sensitivity for orientation away from the light-exposed skin surface towards darker locations. Cercariae of species invading humans (Schistosoma mansoni), birds (Trichobilharzia ocellata) and fish (Diplostomum spathaceum) oriented towards light sources when free swimming in cuvettes. However, they shifted to a negative photo-orientation when migrating in agar substrates after penetration and transformation to schistosomula. This is a first hint that parasites may use photo-orientation when they navigate in host tissues.Keywords
This publication has 15 references indexed in Scilit:
- Ultrastructure of pigmented and unpigmented photoreceptors in cercariae of Trichobilharzia ocellata (Plathelminthes, Trematoda, Schistosomatidae): evidence for the evolution of parasitism in NeodermataZeitschrift für Parasitenkunde, 2003
- Recognition and invasion of human skin by Schistosoma mansoni cercariae: the key-role of L-arginineParasitology, 2002
- Invasion of the vertebrate skin by cercariae of Trichobilharzia ocellata: penetration processes and stimulating host signals.Zeitschrift für Parasitenkunde, 1998
- Physiological Analysis of Cercarial BehaviorJournal of Parasitology, 1992
- Host-finding in Trichobilharzia ocellata cercariae: swimming and attachment to the hostParasitology, 1988
- Trichobilharzia ocellata: chemical stimuli of duck skin for cercarial attachmentParasitology, 1988
- Schistosoma mansoni: Cercarial Responses to Irradiance ChangesJournal of Parasitology, 1982
- Fine Structure of a Possible Photoreceptor in Cercariae of Schistosoma mansoniJournal of Parasitology, 1975
- The Influence of Human Skin Lipids on the Cercarial Penetration Responses of Schistosoma haematobium and Schistosoma mansoniJournal of Parasitology, 1972
- Biologie und Entwicklung von Trichobilharzia Szidati n. sp. (Trematoda, Schistosomatidae), einem Erreger von Dermatitis beim MenschenZeitschrift für Parasitenkunde, 1952