Effects of Diet on the Development of Schistosoma mansoni in Biomphalaria glabrata and on the Neutral Lipid Content of the Digestive Gland–Gonad Complex of the Snail

In a previous study, when the snail Biomphalaria glabrata was infected with Schistosoma mansoni and maintained on a diet of hen's egg yolk, it produced fully developed cercariae in about one-half the time taken by snails fed Romaine lettuce. Increased lipids were also noted in the snails fed th...

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Bibliographic Details
Published in:The Journal of parasitology 2001-02, Vol.87 (1), p.223-225
Main Authors: Fried, B, Muller, E. E, Broadway, A, Sherma, J
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
Biomphalaria - chemistry
Biomphalaria - parasitology
Biomphalaria - physiology
Cercariae
Chicken eggs
Cholesterol esters
Diet
Digestion
Digestive System - chemistry
Egg Yolk
Fundamental and applied biological sciences. Psychology
Gonads - chemistry
Host-Parasite Interactions
Lactuca
Larvae
Lipids
Lipids - analysis
Protozoa. Invertebrata
RESEARCH NOTES
Schistosoma mansoni - growth & development
Snails
Sterols
Triglycerides
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Summary:In a previous study, when the snail Biomphalaria glabrata was infected with Schistosoma mansoni and maintained on a diet of hen's egg yolk, it produced fully developed cercariae in about one-half the time taken by snails fed Romaine lettuce. Increased lipids were also noted in the snails fed the yolk diet. The purpose of the present study was to further investigate nutritional effects of a high-lipid diet on larval schistosome development and to reexamine the time to cercarial patency in infected snails maintained on either the yolk or lettuce diet and to use high-performance thin-layer chromatography (HPTLC) to analyze the neutral lipids in the digestive gland–gonad complex (DGG) of snails maintained on both diets. Infected snails maintained at 26 C and fed either diet produced fully developed cercariae by 4 wk postinfection (PI). Likewise, infected snails maintained at 23 C and fed either diet produced fully developed cercariae by 6 wk PI. The contention that the yolk diet enhanced the time to cercarial patency was not confirmed. The HPTLC analysis of neutral lipids showed that the DGG of infected snails fed the yolk diet contained significantly greater amounts of free sterols and cholesteryl esters but not triacylglycerols than that of the infected snails fed the lettuce diet.
ISSN:0022-3395
1937-2345
DOI:10.1645/0022-3395(2001)087[0223:EODOTD]2.0.CO;2