cystacanth


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cys·ta·canth

(sis'tă-kanth),
The fully developed larva of Acanthocephala, infective to the final host and with an inverted fully formed proboscis characteristic of the adult worm.
[cyst- + G. akantha, thorn or spine]
References in periodicals archive ?
The brightly colored cystacanth stages of these parasites are visible through the gammarid cuticle, allowing preliminary selection of infected individuals directly in the field.
(unidentified adults) 10 1% 1/150 10 -- Rhabdias ranae 255 47% 70/150 3.6 (1-16) Physalopteridae (third stage larvae) 2 1% 1/150 2 -- Acanthocephala Centrorhynchid cystacanths 31 3% 4/150 7.8 (1-27) Oligacarrathorhynchid cystacanth 0 -- -- -- -- 2004-2007 collection Mean intensity n Prevalence (range) Cestoda Distoichometra bufonis 4 2% 2/100 2.0 (1-3) Digeneana Deropegus aspina 0 -- -- -- -- Glypthelmins quieta 35 10% 10/100 3.5 (1-7) Gorgoderina multilobata 4 3% 3/100 1.3 (1-2) Haematoloechus kernensis 228 32% 32/100 7.1 (1-35) Megalodiscus microphagus 2 1% 1/100 2 -- Echinostome metacercariae 35 1% 1/100 35 -- Nematoda Cosmocercoides variabilis 1 1% 1/100 1 -- Hedruri.s sp.
Acanthocephalan cystacanths have been reported from Ctenosaura pectinata, Phyllodactylus lanei, Sceloporus jarrovii and S.
pulex are easily recognized, because the yellow-orange cystacanth stage of P.
Acanthocephalans require at least two hosts in the life cycle; arthropods are the usual intermediate hosts in which the infective stage, the cystacanth, develops (Nickol 1985).
Helminths collected consisted of one single male oligacanthorhynchid cystacanth occurring within the mesentery adjacent to the proximal small intestine in an adult non-gravid female C.
ingens would first have to develop to an infective cystacanth stage in an intermediate insect host.
Mole crabs (Emerita analoga), the intermediate host for P altmani and a major component of the gull-billed tern diet in San Diego, were found in the stomachs of necropsied terns along with cystacanths, and are the presumed source of the parasite infection.
Altered evasive behavior and responses to light in amphipodes harboring acanthocephalan cystacanths. J.
(larvae) and one species of Acanthocephala represented by cystacanths (Oligacanthorhynchidae), were found.
National Parasite Collection, Beltsville, Maryland: Oochoristica macallisteri, 87280; Physaloptera retusa, 87282; Spauligodon giganticus, 87281; oligacanthorhynchid acanthocephalan cystacanths, 87283.