Biomaterial Database

The influence of temperature on the infectivity of Fasciola hepatica miracidia to Lymnaea truncatula. 1976

N O Christensen, and P Nansen

Experiments were performed to study the effect of water temperature on the host-finding capacity (snail localization, attachment, and penetration) of Fasciola hepatica miracidia. Specimens of Lymnaea truncatula were exposed to miracidia labeled in vivo with radioselenium, and the radioactivity which subsequently was confined to the snails was taken as a measure of the host-finding capacity of the parasite. The minimum temperature required for host-finding was 5 to 6 C and the optimum temperature was in the range between 15 and 26 C. The lack of host-finding capacity below 5 to 6 C could be reversed experimentally by raising the temperature. A clear inverse relationship was demonstrated between the environnd 24 C the host-finding capacity ceased after 24 to 30, 20 to 24, and 13 to 20 hr, respectively.

UI	MeSH Term	Description	Entries
D008195	Lymnaea	A genus of dextrally coiled freshwater snails that includes some species of importance as intermediate hosts of parasitic flukes.	Lymnea,Lymnaeas,Lymneas
D005210	Fasciola hepatica	A species of helminth commonly called the sheep liver fluke. It occurs in the biliary passages, liver, and gallbladder during various stages of development. Snails and aquatic vegetation are the intermediate hosts. Occasionally seen in man, it is most common in sheep and cattle.	Liver Fluke,Fasciola hepaticas,Fluke, Liver,Flukes, Liver,Liver Flukes,hepatica, Fasciola
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor