A Time-Lapse Study of Interactions between Echinostoma paraensei Intramolluscan Larval Stages and Adherent Hemocytes from Biomphalaria glabrata and Helix aspersa

1994 ◽  
Vol 80 (5) ◽  
pp. 719 ◽  
Author(s):  
Coen M. Adema ◽  
David F. Arguello II ◽  
Stephen A. Stricker ◽  
Eric S. Loker
Keyword(s):  
Time Lapse ◽  
Biomphalaria Glabrata ◽  
Helix Aspersa ◽  
Larval Stages ◽  
Echinostoma Paraensei

scholarly journals The role of behavior in the survival of Biomphalaria glabrata in biossays with the plant molluscicide Phytolacca dodecandra

1988 ◽  
Vol 83 (1) ◽  
pp. 41-46 ◽  
Author(s):  
P. Jurberg ◽  
J. V. Barbosa ◽  
L. Rotenberg
Keyword(s):  
Liquid Medium ◽  
Time Lapse ◽  
Biomphalaria Glabrata ◽  
Behavior Patterns ◽  
Phytolacca Dodecandra ◽  
Time Out ◽  
Significant Difference

This work examines the role of behavior in the survival of Biomphalaria glabrata exposed to 25, 50 75 and 100 mgl-1 of Phytolacca dodecandra. Time-lapse cinematography was used to quantify accurately the following parameters: (a) frequency of exits from the solution, (b) time spent out of the solution and (c) time elapsed until the first exit from the solution. These behavior patterns were statistically compared between surviving snails and those which later died. The proportion of surviving snails leaving the liquid medium was significantly higher than that of dying snails. In addition, the surviving group spent significantly more time out of the solution than the group which died, except for the 100 mgl-1 concentration. However, no significant difference was detected in the time elapsed until the first exit from the solution. It can be concluded that both the tendency to leave the P. dodecandra solutions, and the time spent out of them, contributed significantly to snail survival. Molluscicide bioassays should take into account the possibility that some behavior patterns of planorbids might contribute to the protection of the snails.

scholarly journals Lipid levels in Biomphalaria glabrata infected with different doses of Echinostoma paraensei miracidia

2011 ◽  
Vol 128 (3) ◽  
pp. 212-216 ◽  
Author(s):  
Vinícius Menezes Tunholi-Alves ◽  
Victor Menezes Tunholi ◽  
Patrícia Gôlo ◽  
Danilo Lustrino ◽  
Arnaldo Maldonado ◽  
...  
Keyword(s):  
Biomphalaria Glabrata ◽  
Lipid Levels ◽  
Different Doses ◽  
Echinostoma Paraensei

The Effect of Size of M Line Biomphalaria glabrata on the Course of Development of Echinostoma paraensei

1987 ◽  
Vol 73 (6) ◽  
pp. 1090 ◽  
Author(s):  
Eric S. Loker ◽  
Daniel F. Cimino ◽  
Gabrielle A. Stryker ◽  
Lynn A. Hertel
Keyword(s):  
Biomphalaria Glabrata ◽  
Echinostoma Paraensei

Effects of patent Echinostoma caproni infection on the sterol composition of the digestive gland-gonad complex of Biomphalaria glabrata as determined by gas-liquid chromatography

1992 ◽  
Vol 66 (1) ◽  
pp. 68-71 ◽  
Author(s):  
P. H. Shetty ◽  
B. Fried ◽  
J. Sherma
Keyword(s):  
Liquid Chromatography ◽  
Digestive Gland ◽  
Biomphalaria Glabrata ◽  
Sterol Composition ◽  
Uninfected Control ◽  
Gas Liquid Chromatography ◽  
Echinostoma Caproni ◽  
Larval Stages ◽  
Percent Composition ◽  
Major Sterol

ABSTRACTSterols in the digestive gland-gonad (DGG) complex of Biomphalaria glabrata (Gastropoda) infected with patent larval stages of Echinostoma caproni (Trematoda) versus uninfected control snails were studied by gas-liquid chromatography. The major sterol present in both populations was cholesterol, 59% in the infected snails and 51% in the controls. Infected snails contained the same phytosterols as the controls—desmosterol, campesterol, stigmasterol, and beta-sitosterol–but the percent composition was reduced. The reduction was significant for both campesterol and stigmasterol.

Effects of infection with Echinostoma paraensei on the circulating haemocyte population of the host snail Biomphalaria glabrata

Parasitology ◽  
1989 ◽  
Vol 98 (1) ◽  
pp. 35-41 ◽  
Author(s):  
S. Noda ◽  
E. S. Loker
Keyword(s):  
Post Infection ◽  
Phase Contrast ◽  
Relative Concentration ◽  
Biomphalaria Glabrata ◽  
Absolute Abundance ◽  
Host Snail ◽  
Relative Percentage ◽  
Foreign Surface ◽  
Echinostoma Paraensei

SummaryCirculating haemocytes from Echinostoma paraensei-infected M line Biomphalaria glabrata snails, or from age- and sizematched control snails, were studied on plastic slides with phase-contrast optics. Granulocytes, hyalinocytes, and round cells were consistently present; granulocytes were further categorized as ‘fully spread' (FS) or ‘partially spread' (PS). Among control snails, the relative percentage and estimated number/mm3 of round cells declined significantly with increased snail size, and the corresponding values for both categories of granulocytes increased. At 1 day post-infection (p.i.) with E. paraensei, overall composition of the haemocyte population was relatively unaffected, but by 8 days p.i. infected snails had significantly higher relative percentages of round cells and PS granulocytes than controls. Because a marked increase in the number of circulating haemocytes is also evident by 8 days p.i., infected snails had approximately 12 times more round cells and PS granulocytes/mm3 of haemolymph than did controls. At 30 days p.i. the relative and absolute abundance of PS granulocytes was still significantly elevated, but otherwise haemocyte populations did not differ from control snails. Alterations in granulocyte size in infected snails were also noted. Infection with E. paraensei has a striking impact of circulating haemocyte populations and also increases the relative concentration of haemocytes with less ability to adhere to a foreign surface.

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