Experimental Infection of Juvenile Biomphalaria glabrata with Cercariae of Echinostoma trivolvis

1995 ◽  
Vol 81 (2) ◽  
pp. 308 ◽  
Author(s):  
Bernard Fried ◽  
Nebila Idris ◽  
Tatsuya Ohsawa
Keyword(s):  
Experimental Infection ◽  
Biomphalaria Glabrata ◽  
Echinostoma Trivolvis

scholarly journals Angiostrongylus vasorum: Experimental Infection and Larval Development inOmalonyx matheroni

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
L. R. Mozzer ◽  
L. C. Montresor ◽  
T. H. D. A. Vidigal ◽  
W. S. Lima
Keyword(s):  
Intermediate Host ◽  
Larval Development ◽  
Experimental Infection ◽  
Biomphalaria Glabrata ◽  
Prepatent Period ◽  
Angiostrongylus Vasorum ◽  
Larval Recovery

The susceptibility and suitability ofOmalonyx matheronias an intermediate host ofAngiostrongylus vasorumand the characteristics of larval recovery and development were investigated. Mollusks were infected, and from the 3rd to the 25th day after infection, larvae were recovered from groups of 50 individuals. The first observation of L2 was on the 5th day, and the first observation of L3 was on the 10th day. From the 22nd day on, all larvae were at the L3 stadium. Larval recovery varied from 78.2% to 95.2%. We found larval development to be faster inO. matheronithan inBiomphalaria glabrata. Our findings indicate that this mollusk is highly susceptible toA. vasorum. Infective L3 were orally inoculated into a dog, and the prepatent period was 39 days. This is the first study to focus onO. matheronias an intermediate host ofA. vasorum.

WITHDRAWN: Alterations in the mitochondrial physiology of Biomphalaria glabrata (Mollusca: Gastropoda) after experimental infection by Angiostrongylus cantonensis (Nematoda: Metastongylidae)

2016 ◽  
Author(s):  
Vinícius Menezes Tunholi-Alves ◽  
Victor Menezes Tunholi ◽  
Anderson Teixeira Santos ◽  
Tatiane Cristina dos Santos Bonfim ◽  
Juberlan da Silva Garcia ◽  
...  
Keyword(s):  
Experimental Infection ◽  
Biomphalaria Glabrata ◽  
Angiostrongylus Cantonensis

Evidence from two planorbid snails of a complex and dedicated response to digenean (echinostome) infection

Parasitology ◽  
1999 ◽  
Vol 119 (4) ◽  
pp. 395-404 ◽  
Author(s):  
C. M. ADEMA ◽  
L. A. HERTEL ◽  
E. S. LOKER
Keyword(s):  
Staphylococcus Epidermidis ◽  
Biomphalaria Glabrata ◽  
The Other ◽  
Digenetic Trematode ◽  
Snail Species ◽  
Helisoma Trivolvis ◽  
General Ability ◽  
Digenean Species ◽  
Reactive Plasma ◽  
Echinostoma Trivolvis

The planorbid snail Biomphalaria glabrata responded to exposure to either the compatible digenetic trematode Echinostoma paraensei or the incompatible species Echinostoma trivolvis by producing increased amounts of several distinctive plasma polypeptides. These polypeptides characteristically precipitated from plasma when mixed with secreted–excreted products (SEP) of sporocysts or rediae from either digenean species. In contrast, control snails, or snails that had been wounded or infected with bacteria (Serratia marcesens or Staphylococcus epidermidis) showed no obvious plasma alterations and no precipitates formed when their plasma was mixed with SEP. Another planorbid species, Helisoma trivolvis, which displays reverse compatibility for the echinostome species used, also responded to exposure to both echinostomes by increased production of plasma polypeptides that precipitated in the presence of SEP. With some individual variation, these 2 snail species synthesized SEP-reactive plasma polypeptides forming diffuse bands centred at 53, 65, 80–120 and 200 kDa (the latter absent in Helisoma trivolvis). The 53 kDa polypeptides had not been observed before, whereas the others have been noted from B. glabrata. The diffuse 65 kDa band was strongly bound by anti-fibrinogen antibodies, supportive of earlier studies indicating it contains fibrinogen-related domains. The other specified polypeptides were also bound by these antibodies raising the possibility that they too contain fibrinogen domains. The results are suggestive of a general ability of these 2 planorbid snails to detect the presence of echinostomes even if the latter are subsequently incapable of development. The complex response they then mount, one not evoked by other challenges such as wounding or bacterial infection, may represent a dedicated response to a frequently encountered group of pathogenic parasites, the digeneans (echinostomes).

Alterations in the Mitochondrial Physiology of Biomphalaria glabrata (Mollusca: Gastropoda) After Experimental Infection by Angiostrongylus cantonensis (Nematoda: Metastrongylidae)

2019 ◽  
Vol 64 (4) ◽  
pp. 693-699 ◽  
Author(s):  
Vinícius Menezes Tunholi-Alves ◽  
Victor Menezes Tunholi ◽  
Ludimila Santos Amaral ◽  
Juberlan da Silva Garcia ◽  
Mariana Gomes Lima ◽  
...  
Keyword(s):  
Experimental Infection ◽  
Biomphalaria Glabrata ◽  
Angiostrongylus Cantonensis

Effect of temperature on survival and infectivity of Echinostoma trivolvis cercariae: a test of the energy limitation hypothesis

Parasitology ◽  
1995 ◽  
Vol 111 (3) ◽  
pp. 373-378 ◽  
Author(s):  
J. A. Pechenik ◽  
B. Fried
Keyword(s):  
Energy Expenditure ◽  
Intermediate Host ◽  
Biomphalaria Glabrata ◽  
Effect Of Temperature ◽  
Energy Stores ◽  
Different Ages ◽  
Energy Limitation ◽  
Second Intermediate Host ◽  
Effects Of Temperature ◽  
Echinostoma Trivolvis

SUMMARYTrematode cercariae typically become unable to successfully infect a host many hours before they die. We examined the hypothesis that both time to 50% mortality and time to loss of infective capacity are controlled to the same degree by rates of energy expenditure, by determining the relative effects of temperature on both parameters. Infective capacity was assessed by exposing Echinostoma trivolvis cercariae of different ages to a suitable second intermediate host (the gastropod Biomphalaria glabrata) and counting 1–2 days later the number of metacercarial cysts formed. Temperature had a remarkably similar effect on time to 50% mortality and loss of infective capacity, supporting the hypothesis that both absolute and functional cercarial life-spans are limited by the rates at which energy stores are utilized.

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