cystacanth


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cystacanth

[′sis·tə‚kanth]
(invertebrate zoology)
The infective larva of the Acanthocephala; lies in the hemocele of the intermediate host.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
We relied on gammarids that were naturally infected with cystacanth parasites, that is, those at the last larval stage that is infective for the definitive host and at which such changes occur in hosts, and studied the effect of acclimatization at different temperatures on the behavior of uninfected and infected individuals.
Changes in prevalence and intensity of infection of ProfilicoUis altmani (Perry, 3942) cystacanth (Acanthocephala) parasitizing the mole crab Emerita analoga (Stimpson, 3857): an El Nino cascade effect?
of lobsters 90 19 Vibriosis 38% * 6% Granulomas 44% * 5% Possible early calcinosis 3% 0% Hepatopancreatitis 15% * 0% (any form) Focal necrosis 9% 0% Coalescent necrosis 6% 0% (severe) Filament necrosis in gill 8% 5% Idiopathic lesions in eyes 54% * 16% Severity of eye lesions 21.5% [+ or -] 26.5% 1.5% [+ or -] 4.7% Acanthocephalan cystacanth 7% 0% * Chi-square, P < 0.05.
Voucher helminths from the 2004-2007 collection were deposited in the United States National Parasite Collection, USNPC, Beltsville, Maryland: Distoichometra bufonis (USNPC 100930); Glypthelmins quieta (USNPC 100931); Gorgoderina multilobata (USNPC 100932); Haematoloechus kernensis (USNPC 100933); Megalodiscus microphagus (USNPC 100934); Digenean metacercariae (USNPC 100938); Cosmocerca variabilis (USNPC 100935); Rhabdias ranae (USNPC 100936); Acanthocephalan cystacanth (USNPC 100937).
Gravid individuals of two species of Nematoda, Strongyluris similis Caballero, 1938, Thubunaea iguanae Telford, 1965 and one cystacanth of a species of oligacanthorhynchid Acanthocephala were found.
Intermediate hosts that harbor the infective stage of acanthocephalans, the cystacanth stage, may show physiological changes such as reduced [O.sub.2] consumption (Rumpus and Kennedy 1974) and increased hemocyanin concentration, the respiratory pigment for most crustaceans (Bentley and Hurd 1993).
23.3 1-18 3.93 [+ or -] 3.82 (cystacanth) Nematoda Anisakidae 88.3 1-1881 171.12 [+ or -] 343.40 (larvals) Copepoda Metacaligus 83.3 1-90 18.40 [+ or -] 17.90 uruguayensis Parasites Mean abundance Site of [+ or -] SD infection Digenea Lecithochirium 179.40 [+ or -] 255.70 stomach and microstomum intestine Lecithochirium 3.10 [+ or -] 6.60 stomach and sp.
Cystacanth larvae were recovered from two of the three immature Lepomis sp.
and one species of Acanthocephala: an oligacanthorhynchid cystacanth. Number of helminths, prevalence (infected snake/number snakes examined X 100), location by province and museum numbers are in Table 1.