• Cercariae released from infected snails then infect crabs or crayfish and form cysts (called metacercariae). (msdmanuals.com)
  • Cercariae penetrate freshwater crabs or crayfish and encyst to form metacercariae. (msdmanuals.com)
  • Humans are infected by ingesting uncooked crabs or crayfish containing metacercariae. (med-chem.com)
  • Although we generally think of infected raw crabs or crayfish as the most common sources of infection, a number of other foods and cultural practices can be implicated as well, including the ingestion of metacercariae in the flesh of paratenic hosts. (med-chem.com)
  • 5.The cercariae infect crabs or crayfish and form cysts (called metacercariae). (merckmanuals.com)
  • The cercariae emerge and invade the second intermediate host (ie, a crustacean such as crabs or crayfish), in which they become metacercariae. (medscape.com)
  • At their base, the sporocysts produce asexually many tail-less cercariae, which develop directly into metacercariae within the sporocyst, depositing a thick mucoid coat around themselves. (wikipedia.org)
  • Cercariae are released from snails in late summer and early autumn which develop into infective metacercariae. (veterinary-practice.com)
  • In the snails, the parasites undergo several developmental stages (sporocysts, rediae, and cercariae) before emerging as metacercariae and completing the life cycle. (paraedu.ir)
  • The cercariae migrate onto wet herbage, encystingas metacercariae, the highly resilient infective stage of the liver fluke. (com.ng)
  • In North America as the place of F. magna origin, at least five snail species of the family Lymnaeidae producing cercariae being able to form metacercariae were confirmed as the intermediate hosts [ 10 - 13 ]. (biomedcentral.com)
  • 17 ] obtained cercariae (and subsequently infective metacercariae) from experimentally infected Stagnicola palustris . (biomedcentral.com)
  • The resultant sporocysts were producing infective metacercariae in the following spring but then died in late summer. (wikipedia.org)
  • Following ingestion of the encysted infective stage of F. hepatica (metacercariae), the parasites emerge in the intestine as newly excysted juveniles (NEJs). (biomedcentral.com)
  • Egg-laying adult liver fluke develop 10 to 12 weeks after ingestion of the metacercariae and fasciolosis is then seen in cattle from mid-winter onwards, although increasingly it is being diagnosed during the grazing season. (veterinary-practice.com)
  • Humans are infected by ingestion of uncooked aquatic vegetation on which metacercariae are encysted. (med-chem.com)
  • The adult fluke can also be recovered at surgery. (cdc.gov)
  • Adult fluke of Fasciolopsis buski. (medscape.com)
  • The adult worm is a plump, ovoid, reddish brown fluke found encapsulated in the lung. (med-chem.com)
  • Opisthorchiasis is a trematode (fluke) infection caused by infection with one of the species of the liver fluke Opisthorchis , which is acquired by eating raw or undercooked freshwater fish containing infectious metacercariae. (patient.info)
  • Adult fluke lay eggs that are passed out onto pasture in the faeces. (com.ng)
  • The localization of CaBP4 within adult fluke structure was detected by immunohistochemical analysis. (biomedcentral.com)
  • the liver fluke, Fasciola hepatica published between 2005 and 2009 has revealed a general lack of information on where fluke material (i.e. metacercariae) was sourced from. (keyopinionleaders.com)
  • The metacercariae excyst in the duodenum and migrate through the intestinal wall into the abdominal cavity. (med-chem.com)
  • The metacercariae then excyst in the duodenum and penetrate the intestinal wall, reaching the peritoneal cavity. (paraedu.ir)
  • To ascertain residual sonographic and histopathological findings of clonorchiasis after treatment, the present study evaluated sonographic findings in rabbits which were infected with 500 metacercariae of C. sinensis every 6 months for 18 months after treatment with praziquantel. (lookformedical.com)
  • The mammalian definitive host (cats, dogs, and various fish-eating mammals including humans) become infected by ingesting undercooked fish containing metacercariae. (cdc.gov)
  • The first case described in humans was at autopsy in Taiwan in 1879, when adult flukes were found in the lung. (medscape.com)
  • Adult isolates for four species recovered from natural and experimental infections were also identified. (biomedcentral.com)
  • these parasites include 37 adult and 43 larval (metacercariae) species of trematodes, 62 monogeneans, 15 adult and 18 larval (metacestode) cestodes, 6 adult and 4 larval (cystacanth) acanthocephalans, and 54 adult and 15 larval nematodes (L3). (allenpress.com)
  • Adults of the pentastome species that infect fish are found in reptiles, which are considered to be their final hosts. (ufl.edu)
  • Alligators harbor adult pentastomes of the species Sebekia mississippiensis . (ufl.edu)
  • We collected larvae of sympatric D. quadramaculatus and D. marmoratus from a stream (Beech Creek) in Towns County, Georgia, U.S.A. Although prevalence and mean visible metacercariae were different in June, no difference was seen between the species in either measure of infection in August. (bioone.org)
  • The morphology of the adult worms, the eggs, and the larval stages can be used to diagnose the infection and differentiate it from other liver flukes. (paraedu.ir)
  • The adult worms of Fasciola hepatica measure up to 10 mm in length and 2.5 mm in width. (paraedu.ir)
  • Adult fasciolid flukes producing eggs were found in the liver pseudocysts ( F. magna ) and the bile ducts ( F. hepatica ). (biomedcentral.com)
  • Approximately 1 week later, adult flukes reenter from the abdominal cavity and penetrate the diaphragm to reach the pleural space and lungs. (medscape.com)
  • From there, they migrate through the liver parenchyma into the bile ducts, where they mature into adult flukes and produce eggs. (paraedu.ir)
  • The most frequent types of primary liver cancer in adults are hepatocellular carcinoma (HCC) and cholangiocarcinoma (CCA), constituting HCC the 70-85% of cases and CCA the 30-15%, depending on the country [ 2 ] . (encyclopedia.pub)
  • Metacercariae of Centrocestus formosanus in goldfish (Carassius auratus L.) imported into Croatia. (ij-aquaticbiology.com)
  • Adult flukes live encapsulated in cystic pockets in the lung parenchyma but may also be found in extrapulmonary locations. (uab.edu)
  • Adult flukes live in human lungs and deposit eggs into the bronchi. (medscape.com)
  • The adult trematode is reddish-brown and ovoid. (medscape.com)
  • Digenea trematode infection is said to be commonplace in wild fish, with encysted metacercaria being more common than the adult worm 1 . (scialert.net)
  • The infection occurs when the host ingests the metacercariae (the infective stage) of the parasite, which are encysted on aquatic plants or other substrates. (paraedu.ir)
  • Typically, adult stages of the parasite are found in the respiratory systems of reptiles, usually within the lungs and/or trachea (windpipe). (ufl.edu)
  • Within the lungs of their reptile hosts, the adult pentastomes deposit eggs containing larvae having four leg-like appendages. (ufl.edu)
  • After digestion of the cyst in the duodenum, the larva enters the biliary duct where it matures into the adult worm, which lives off mucosal secretions. (patient.info)
  • Adults measure approximately 7 mm long by 1.5 mm wide in the human host (adults are slightly smaller in feline hosts). (cdc.gov)
  • Identification of intermediate hosts, intramolluscan stages, adult flukes and eggs was performed by sequencing the ITS2 region. (biomedcentral.com)
  • There, they develop into adults and produce eggs. (msdmanuals.com)
  • they enter lung tissue, become encapsulated, and develop into hermaphroditic adult worms, which produce eggs. (msdmanuals.com)
  • Adult worms, which may live for 9 years in the bile ducts, produce eggs that are carried by the bile fluid into the intestinal lumen and passed into the environment with the feces. (med-chem.com)
  • There, they develop into adults and produce eggs, which are passed in sputum that is coughed up and spit out or swallowed and passed in stool. (merckmanuals.com)
  • Adult pentastomes, which are found in reptiles, look different from the larval or nymph stage, found in fish. (ufl.edu)
  • have been found harboring adult stages of one group of pentastomes in the genus Alofia . (ufl.edu)
  • Immunohistochemical analysis localized native CaBP4 to the oral sucker, pharynx, genital pore, acetabulum and tegument of adult F. gigantica . (biomedcentral.com)
  • Adults have 2 muscular suckers, an oral sucker situated anteriorly and a ventral sucker at mid body on the ventral surface. (medscape.com)
  • The gallbladder undergoes similar pathologic changes and may even harbor adult worms. (med-chem.com)
  • The adult parasite lives in the bird's cloaca, releasing its eggs into the faeces. (wikipedia.org)
  • Adults reside in the bile ducts of the definitive host. (cdc.gov)
  • In addition to 3 known enzymes, 2 other cysteine proteases at 15 and 53 kDa were identified in juveniles and adults and were purified. (ewha.ac.kr)
  • Between 4 and 16 wk, activities of 3 cysteine proteases of juveniles and adults were additionally exhibited. (ewha.ac.kr)
  • Scanning electron microscopy of the tegumental surface of adult Haplorchis pumilio (Looss). (kku.ac.th)
  • differ from adults of Clonorchis in the shape of the testes. (cdc.gov)
  • Having lost the mucoid coat, they develop into adult distomes, c. 1.5 mm long. (wikipedia.org)
  • Organisms that are progenetic never achieve the adult form experienced by their evolutionary ancestors. (en-academic.com)
  • 2010). Lower isoflurane concentration affects spatial learning and neurodegeneration in adult mice compared with higher concentrations . (up.pt)
  • The "tail" (actually an extension of the cloaca used for internal fertilization) is a distinguishing feature of adult males in this genus (Duellman and Trueb, 1994). (amphibiaweb.org)
  • The adults are hermaphroditic and release eggs into the bird's faeces. (wikipedia.org)
  • The lifetime of the adult stage in its bird host is believed to be of the order of weeks or months. (wikipedia.org)
  • Description of the ovarian follicle maturation of the migratory adult female bulatmai barbel (Luciobarbus capito, Guldenstadt 1772) in captivity. (ij-aquaticbiology.com)
  • they mature to adults in the vicinity of the bronchioles, where they discharge their eggs into the bronchial secretions. (med-chem.com)