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Effects of glucose on survival, infectivity and linear movement of the cercariae of Echinostoma caproni

Published online by Cambridge University Press:  12 April 2024

E.L. Ponder  and
B. Fried
E.L. Ponder
Affiliation:
Department of Biology, Lafayette College, Easton, PA 18042, USA
B. Fried*
Affiliation:
Department of Biology, Lafayette College, Easton, PA 18042, USA
*
*Author for correspondence Fax: (610)330-5705 Email: [email protected]
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Abstract

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The effects of glucose in artificial spring water (ASW) on the survival, infectivity, and linear movement of Echinostoma caproni cercariae were studied. Cercariae maintained at 23°C in 1% glucose in ASW (ASWG) or ASW alone, reached 50% survival at 26 and 23 h, respectively. All cercariae in ASWG and ASW were dead by 50 and 32 h, respectively. Infectivity to juvenile Helisoma trivolvis (Colorado strain) snails was significantly less for cercariae aged 16 h in ASWG compared to cercariae aged 16 h in ASW. Linear movement, i.e. the ability of cercariae to traverse a 1-cm radius, ceased at 16 and 20 h for cercariae maintained in ASWG and ASW, respectively. Glucose added to ASW extended the survival time of E. caproni cercariae but decreased their ability to infect snails or move in a linear direction.

Type
Research Article
Information
Journal of Helminthology , Volume 78 , Issue 2 , June 2004 , pp. 185 - 187
Copyright
Copyright © Cambridge University Press 2004

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