Cysticercus

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Related to cysticerci: Neurocysticercosis

cysticercus

[¦sis·tə′sər·kəs]
(invertebrate zoology)
A larva of tapeworms in the order Cyclophyllidea that has a bladder with a single invaginated scolex.

Cysticercus

 

a larval stage of tapeworms. The cysticercus resembles a cyst whose wall is retracted in one place to form the head; the head has suckers and sometimes hooks. The cysticercus develops from an oncosphere in any organ (frequently in muscles, brain, and eye) of its intermediate host, such as swine and cattle. After entering its definitive host, for example, a human being, the cysticercus protrudes from the cyst and the larva is transformed into an adult worm.

The cysticercus is characteristic of most tapeworms, the pork and beef tapeworms in particular.

References in periodicals archive ?
the scolex, were considered as living cysticerci. Lesions were interpreted as calcified cysticerci when presented with a fibrous capsule adhered to the surrounding tissue containing a whitish to yellowish material, with a caseous and/or calcareous appearance.
All hepatic lesions and cysticerci in the peritoneal cavity were counted at necropsy, and hepatic samples of lesions detected were recovered, fixed in 10% buffered formalin and processed for histological analysis.
Nash, "Edema surrounding calcified intracranial cysticerci: Clinical manifestations, natural history, and treatment," Pathogens and Global Health, vol.
crassiceps cysticerci follows a ping-pong bi bi kinetic mechanism with the NADPH/GSSG couple as the substrates, in which dissociation of [NADP.sup.+] from the enzyme during the catalytic cycle is an irreversible event.
solium commonly forms cysticerci in tissues of various atypical intermediate hosts, including rabbits, camels, dogs, cats, and humans (2,4).
There are few reports of accidental ingestion of eggs and the subsequent development of the cysticerci in the central nervous system in nonhuman primates which may cause neurological signs and lesions similar to those in humans.
In the CNS, the cysticerci (the larvae) may lodge in the brain parenchyma, the spinal cord, the sub-arachnoid space, or the ventricles, lying dormant for years or causing various categories of clinical disease (Table 2).
Steroid hormone production by parasites: the case of Taenia crassiceps and Taenia solium cysticerci. J.
Subsequent penetration of the mucosa by the embryos results in cysticerci developing in the human organs and tissues.
The ova develop into larvae, penetrate the intestinal wall, disseminate throughout the body via the vascular system, and encyst in tissue as cysticerci. (1) Cysticerci have a propensity for developing in the central nervous system (60% of cases) (4) and are classically described as containing an invaginated scolex (head of organism).
The four patients had recurrent seizures, and the brain lesions identified by diagnostic imaging were consistent with cysticerci. Timely diagnosis could lead to treatment.
This infection is acquired via ingestion of cysticerci, the larvae of the Taenia solium (tapeworm, or cestode), in uncooked/undercooked pork or fecally contaminated food or water.