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Article

Cercariae of a Bird Schistosome Follow a Similar Emergence Pattern under Different Subarctic Conditions: First Experimental Study

1
Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 370 05 České Budějovice, Czech Republic
2
Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, N9037 Tromsø, Norway
3
Department of Parasitology, Faculty of Science, University of South Bohemia in České Budějovice, 370 05 České Budějovice, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editor: Sara V. Brant
Pathogens 2022, 11(6), 647; https://doi.org/10.3390/pathogens11060647
Received: 22 April 2022 / Revised: 22 May 2022 / Accepted: 31 May 2022 / Published: 3 June 2022
(This article belongs to the Special Issue Advances in Avian Schistosomes and Cercarial Dermatitis)
The emergence of cercariae from infected mollusks is considered one of the most important adaptive strategies for maintaining the trematode life cycle. Short transmission opportunities of cercariae are often compensated by periodic daily rhythms in the cercarial release. However, there are virtually no data on the cercarial emergence of bird schistosomes from freshwater ecosystems in northern latitudes. We investigated the daily cercarial emergence rhythms of the bird schistosome Trichobilharzia sp. “peregra” from the snail host Radix balthica in a subarctic lake under both natural and laboratory seasonal conditions. We demonstrated a circadian rhythm with the highest emergence during the morning hours, being seasonally independent of the photo- and thermo-period regimes of subarctic summer and autumn, as well as relatively high production of cercariae at low temperatures typical of northern environments. These patterns were consistent under both field and laboratory conditions. While light intensity triggered and prolonged cercarial emergence, the temperature had little effect on cercarial rhythms but regulated seasonal output rates. This suggests an adaptive strategy of bird schistosomes to compensate for the narrow transmission window. Our results fill a gap in our knowledge of the transmission dynamics and success of bird schistosomes under high latitude conditions that may serve as a basis for elucidating future potential risks and implementing control measures related to the spread of cercarial dermatitis due to global warming. View Full-Text
Keywords: trematodes; cercariae; bird schistosome; Trichobilharzia; emergence; light; temperature trematodes; cercariae; bird schistosome; Trichobilharzia; emergence; light; temperature
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MDPI and ACS Style

Soldánová, M.; Born-Torrijos, A.; Kristoffersen, R.; Knudsen, R.; Amundsen, P.-A.; Scholz, T. Cercariae of a Bird Schistosome Follow a Similar Emergence Pattern under Different Subarctic Conditions: First Experimental Study. Pathogens 2022, 11, 647. https://doi.org/10.3390/pathogens11060647

AMA Style

Soldánová M, Born-Torrijos A, Kristoffersen R, Knudsen R, Amundsen P-A, Scholz T. Cercariae of a Bird Schistosome Follow a Similar Emergence Pattern under Different Subarctic Conditions: First Experimental Study. Pathogens. 2022; 11(6):647. https://doi.org/10.3390/pathogens11060647

Chicago/Turabian Style

Soldánová, Miroslava, Ana Born-Torrijos, Roar Kristoffersen, Rune Knudsen, Per-Arne Amundsen, and Tomáš Scholz. 2022. "Cercariae of a Bird Schistosome Follow a Similar Emergence Pattern under Different Subarctic Conditions: First Experimental Study" Pathogens 11, no. 6: 647. https://doi.org/10.3390/pathogens11060647

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