sporocyst


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Related to sporocyst: Miracidium, Metacercariae, Miracidia, rediae

sporocyst

 [spor´o-sist]
1. any cyst or sac containing spores or reproductive cells; the oocyst of certain protozoa in which sporozoites develop.
2. the larval stages of flukes in snails.

spo·ro·cyst

(spō'rō-sist),
1. A larval form of digenetic trematode (fluke) that develops in the body of its molluscan intermediate host, usually a snail; the sporocyst forms a simple saclike structure with germinal cells that bud off internally and develop into other larval types that continue this process of larval multiplication (considered to be a form of polyembryony).
See also: miracidium, redia, cercaria.
2. A secondary cyst that develops within the oocyst of Coccidia, a group of sporozoans that includes many of the most important disease agents of domestic animals and fowl; the sporocyst develops from a sporoblast and produces within itself one or several sporozoites, the infective agents for infection and multiplication in the next host.
[sporo- + G. kystis, bladder]

sporocyst

(spôr′ə-sĭst′)
n.
1. A resting cell that produces asexual plant spores.
2. A protective structure containing the infective sporozoites of an apicomplexan parasite.
3. A saclike larval stage in many trematodes, from which the rediae emerge.

spo·ro·cyst

(spōr'ō-sist)
1. A larval form of digenetic trematode (fluke) that develops in the body of its molluscan intermediate host, usually a snail.
See also: cercaria
2. A secondary cyst that develops within the oocyst of Coccidia, a group of sporozoans that includes many of the most important disease agents of domestic animals and fowl.
[sporo- + G. kystis, bladder]

sporocyst

a cyst producing asexual spores.
References in periodicals archive ?
In the same way that sporocysts can increase mortality in infected snails, too many cysts and the second intermediate host may also die; here again, we see the potential for stress caused by parasites to interact with or compound stress caused by climate change.
In ovaries, sporocysts containing germinal balls and developing cercariae in a wide range of developmental stages were detected (Fig.
In this study, measurements of oocysts, sporocysts, and sporozoites of the Caryospora species observed were obtained.
However, other, related species of trematode within the family Monorchiidae (Subclass Digenea) use only one intermediate host: a single species of clam for both sporocyst and metacercarial life stages (DeMartini and Pratt 1964).
Sarcocystis Sarcosporidiosis Coccidia: thin-walled bovihominis oocyst that (also called contains 2 mature Sarcocystis sporocysts (each hominis); containing Sarcocystis 4 sporozoites) suihominis Predominant Clinical Signs Ameba Signs in People in Animals Balantidium Acute disease * Pigs: usually coli produces bouts of harmless, but colitis (abdominal it can cause pain, headache, severe clinical tenesmus, disease with vomiting and some pigs anorexia) experiencing Chronic disease moderate to produces severe diarrhea.
dendriticum hatch, pass through two sporocyst stages of their lives, transform into another life stage called cercaria, and migrate to the respiratory chambers of the snails.
Table 1 provides a summary of the model parameters and environmental variables, together with their units, except four parameters associated with snail and sporocyst development, discussed below, which do not appear explicitly in Figure 2.
Amaya-Huerta and Almeyda-Artigas (1994) proposed that the parasite was imported as sporocyst or redial stages within the thiarid snall Melanoides tuberculata that was possibly introduced simultaneously with the black carp from China as a food for this malacophagous fish.
Instead, experiments reveal the regular occurrence of predation by dominant species (with mouthed redial larval stages) on subordinate species and that certain species with only sporocyst larval stages (mouthless) are able to indirectly suppress the development of other subordinate species in a largely linear dominance hierarchy (Lie et al.
middendorfi in Russia were reported to lack a Stieda body and discernible sporocyst residuum (Arnastauskene, 1980).
(59) La miracidium with one pair of flame cells (60) La saclike sporocyst stage ("mother sporocyst") in snail