Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “CESTODA”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 55 records · Page 3Linked to original sources
PubMed2003

Host specificity and population structure of two exotic helminths, Camallanus cotti (Nematoda) and Bothriocephalus acheilognathi (Cestoda), parasitizing exotic fishes in Waianu Stream, O'ahu, Hawai'i.

Introduction of exotic fishes into Hawai'ian streams has resulted in the simultaneous introduction of exotic parasites. Camallanus corti (Nematoda) and Bothricephalus acheilognathi (Cestoda) are the most prevalent and abundant fish helminths in Hawai'ian streams. The population structure and host specificity of C. cotti and B. acheilognathi in exotic poeciliids were examined during May and June 1995 in Waianu Stream, O'ahu, Hawai'i. Prevalence and mean abundance of C. cotti were significantly different among Poecilia reticulata (65.2%, 1.05), Poecilia mexicana (49.0%, 0.87), and Xiphophorus helleri (32.3%, 0.44). Prevalence of B. acheilognathi was significantly higher in P. mexicana (6.1%) than in P. reticulata (2.1%) and X. helleri (1.6%). However, tapeworm differences in mean abundance were not significant among P. mexicana (0.08), P. reticulata (0.04), or X. helleri (0.03). Nematode and tapeworm prevalence and mean abundance were not significantly different with regard to fish sex. Camallanus cotti prevalence and mean abundance increased as P. mexicana body size increased (r2 = 0.84 and r2 = 0.72, respectively), whereas B. acheilognathi displayed no significant trend with respect to poeciliid body size.

Analysis of Variance↗
PubMed2003

A new species of Mathevotaenia (Cestoda: Anoplocephalidae) and other tapeworms from marsupials in Argentina.

Cestodes are reported from Didelphis albiventris Lund, 1840 and Micoureus cinereus Temminck, 1824 (Marsupialia: Didelphidae) in Argentina. These include a new species of Mathevotaenia Akhumyan, 1946 (Cestoda: Anoplocephalata) as well as M. bivittata (Janicki, 1904) and an unknown hymenolepidid cestode. Mathevotaenia argentinensis n. sp. is characterized by a relatively narrow strobila, 18-37 mm in total length and 1.0-1.5 mm in maximum width, 135-163 craspedote proglottids, 19-27 testes, and a muscular genital atrium. This species differs from M. didelphidis (Rudolphi, 1819) in the disposition of the genital ducts between the excretory canals and in the entrance of the vagina into the genital atrium posterior to the cirrus pouch; from M. paraguayae Schmidt and Martin, 1978 in the disposition of the genital ducts, absence of a seminal receptacle, and presence of an armed cirrus; and from M. boliviana Sawada and Harada, 1986 and M. pennsylvanica Chandler and Melvin, 1951 in the presence of an armed cirrus. Linstowiines appear to be the dominant cestodes in New World marsupials, with M. bivittata representing the most prevalent and widely distributed species. The hymenolepidid is the first record of this family in Neotropical marsupials.

Animals↗
PubMed2005

New genus, new species of Cestoda (Anoplocephalidae), new species of Nematoda (Cosmocercidae) and other helminths in Cyrtodactylus louisiadensis (Sauria: Gekkonidae) from Papua New Guinea.

Gekkotaenia novaeguineaensis n. gen., n. sp. (Cestoda: Anoplocephalidae) from the small intestine and Cosmocerca zugi n. sp. (Nematoda: Cosmocercidae) from the large intestine of the ring-tailed gecko, Cyrtodactylus louisiadensis (Sauria: Gekkonidae) are described and illustrated. Gekkotaenia novaeguineaensis n. gen., n. sp. is unique among the acraspedote Linstowiinae in possessing a poral female reproductory system. Cosmocerca zugi n. sp. is the 22nd species to be assigned to the genus and differs from other species in the genus by possessing 4 pairs of rosette papillae on plectanes and having a gubernaculum longer than the spicules. It is the fifth species to be described from the Australian biogeographical region. Eight additional helminth species were found: the digenean, Allopharynx macallisteri; 2 cestodes, cysticercoids of Cyclophyllidea gen. sp. and tetrathyridia of Mesocestoides sp.; 5 nematodes, larvae in cysts of Abbreviata sp., Aplectana macintoshii, Oswaldocruzia bakeri, Parapharyngodon maplestonei, and an undescribed species of Physalopteroides. Cyrtodactylus louisiadensis represents a new host record for each of these helminths.

Animals↗
PubMed2006

Guidus n. gen. (Cestoda: Tetraphyllidea), with description of a new species and emendation of the generic diagnosis of Marsupiobothrium.

Guidus n. gen. (Cestoda, Tetraphyllidea) is proposed for 3 cestode species from skates (Bathyraja spp.: Rajiformes, Rajidae). Members of Guidus differ from those of all other phyllobothriid genera in possessing 4 sessile and conspicuously muscular, saclike bothridia; a bothridial aperture toward anterior end of scolex, and perpendicular to scolex axis; aperture surrounded by a continuous sphincter of circular muscles, and 1 marginal accessory sucker. A new species, Guidus argentinense n. sp., is described, the diagnosis of Marsupiobothrium antarcticum is emended, and it is transferred to the new genus along with Marsupiobothrium awii. These species can be easily distinguished from G. argentinense by the presence of lappets in the bothridial margin. In addition, the diagnosis of Marsupiobothrium is emended based on the redescription of the type species, Marsupiobothrium alopias.

Animals↗
PubMed1999

Species of Proteocephalus Weinland, 1858 (Cestoda: Proteocephalidae), parasites of coregonid and salmonid fishes from North America: taxonomic reappraisal.

A taxonomic study of species of Proteocephalus Weinland, 1858 (Cestoda: Proteocephalidae), from coregonid and salmonid fishes in North America, based largely on their type specimens, was carried out. None of the taxa studied possesses obvious autapomorphies that would justify its validity. On the contrary, all species share the following diagnostic features typical of Proteocephalus longicollis (Zeder, 1800) (syn. Proteocephalus exiguus La Rue, 1911), a polymorphic and widely distributed parasite in the Holarctic: (1) a spherical or club-shaped scolex, with sublaterally situated suckers and a vestigial but distinct and relatively large apical sucker; (2) the vagina possessing a well-developed vaginal sphincter and crossing mostly ventrally the proximal part of the cirrus sac; and (3) a long, thick-walled cirrus sac, overlapping vitelline follicles medially by more than its proximal half. Accordingly, Proteocephalus pusillus Ward, 1910; P. laruei Faust, 1920; "P. obtundus" La Rue, 1920 (nomen nudum); P. arcticus Cooper, 1921; P. wickliffi Hunter and Bangham, 1933; P. parallacticus MacLulich, 1943; P. californicus Haderlie, 1950; P. salmonidicola Alexander, 1951; and P. primaverus Neiland, 1952 are considered junior synonyms of P. longicollis.

Animals↗
PubMedDate not supplied

[Embryonic development of three Cestoda from the genus Acanthobothrium (Tetraphyllidea, Onchobothriidae) (author's transl)].

The embryonic development from the egg to the oncosphere is examined in three Cestoda: Acanthobothrium coronatum (Rud., 1819), Acanthobothrium filicolle, Zschokke, 1888 and Acanthobothrium zschokkei Baer, 1948 (Tetraphyllidea, Onchobothriidae). The three ontogeneses have in common the following data: -- Two vitelline cells pass with the zygote into the ootype where a thin shell is formed out of a material which comes from the vitelline cells. -- At first the cleavage is equal, then it becomes unequal resulting in the formation of four types of blastomeres: macromere, secondary macromere, mesomere and micromere. -- The preoncospheral phase is characterized first by the blastomere multiplication and later by their decreasing number and differentiation. -- The embryonic envelopes are formed within the shell. The vitelline layer includes the cytoplasm, a vitelline nucleus and possibly the secondary macromere, the nucleus of which always lies against the outer membrane of this envelope. The syncytial embryophore develops from mesomeres coming from the embryo. -- The oncosphere is limited by its owm membrane whose posterior region seems to double in order to form a kind of cap bending over the six hook tips. The final number of embryonic hexacantha cells is relatively low.

Animals↗
PubMed1992

A new species of Linstowia (Cestoda: Anoplocephalidae) from marsupials in Bolivia.

A new species of cestode of the genus Linstowia (Cestoda: Anoplocephalidae) is described from marsupials of the genera Thylamys and Monodelphis. The new species (Linstowia schmidti) differs from Linstowia iheringi Zschokke, 1904, in having a much smaller strobila and reduced number of proglottids, and in the distribution of the eggs in gravid proglottids. In Bolivia, cestodes of the genus Linstowia appear to have a restricted geographic distribution, occurring in marsupials only in southeastern Bolivia near the western margin of the Chaco. This host-parasite association may represent an ecological-historical relict.

Animals↗
PubMed2005

Studies on Phyllobothrium lactuca (Cestoda: Phyllobothriidae) and Philometra salgadoi (Nematoda: Philometridae) parasitizing Boops boops from the Mediterranean Sea, Egypt.

A total of 30 specimens of Boops boops marine fishes were collected from Alexandria fish market. The fishes were dissected out for parasites. Phyllobothrium lactuca (Cestoda: Phyllobothriidae) was isolated from the intestine and Philometra salgadoi (Nematoda: Philimetridae) was isolated from the ovary. Both were identified using standard keys, and examined by Scan Electron Microscopy (SEM). Some morphological features reported were unique. The two parasites represent new hosts record of B. boops.

Animals↗
PubMed1990

A new genus of Dilepididae (Cestoda) of the yellowbill Ceuthmochares aereus (Cuculidae) from the Ivory Coast.

Bonaia africana n. gen., n. sp. (Cestoda: Dilepididae) has been found in Ceuthmochares aereus (Aves: Cuculidae) in the Ivory Coast (West Africa). This new tapeworm is mainly characterized by its unusual rostellar hooks that are implanted irregularly and which present a variable form and length in the same rostellum. The differential diagnosis, particularly in comparison with the closely related genera Liga and Amoebotaenia, is presented: Liga possesses an atrial bundle of setae and Amoebotaenia 1 row of well built hooks with a typical blade. It is assumed that the unusual disposition of the rostellar hooks described here could be a transitional form between the 1- and 2-row patterns or a degenerate derivative of a regular arrangement.

Animals↗
PubMed1990

Caryophyllaeides ergensi sp. n. (Cestoda: Caryophyllidea) from Leuciscus Leuciscus baicalensis from Mongolia.

The tapeworm Caryophyllaeides ergensi sp. n. (Cestoda: Caryophyllidea) is described from Leuciscus leuciscus baicalensis from the River Selenga basin in Mongolia. It differs from the only hitherto recognized species of the genus C. fennica (Schneider, 1902), mainly in its extremely long uterus with coils extending anteriorly to anterior half, sometimes up to anterior third of the body of gravid specimens.

Animals↗
PubMedDate not supplied

[The morphology and biology of the cestode Schistotaenia srivastavai (Cestoda, Amabiliidae)--a new representative of the fauna of the USSR].

In 1979 to 1981 larvae of the cestode Schistotaenia srivastavai (Cestoda, Amabiliidae), a new member of the fauna of the USSR, were first found in 8 species of damselflies (Odonata, Zygoptera) from water bodies of Kustanai (north Kazakhstan) and Tselinograd (central Kazakhstan) Provinces. Adult cestodes were found in the red-necked grebe (Podiceps griseigena). Cysticercoid is described.

Animals↗
PubMedDate not supplied

[The developmental cycle of Proteocephalus thymalli (Cestoda, Proteocephalidae)--a parasite of the Arctic grayling from Lake Baikal].

The life cycle of Proteocephalus thymalli (Cestoda, Proteocephalidae), a parasite of Siberian glame (Thymallus arcticus), was repeated under experimental conditions. The first intermediate hosts, the copepods Epischura baicalensis, Cyclops kolensis and C. vicinus, were determined. The developmental time of P. thymalli in the first intermediate host was determined and the morphology of the larval and adult phases was described.

Animals↗
PubMed1986

[Proteocephalus exiguus (Cestoda) as a parasite of Salmo gairdneri (Pisces)].

Proteocephalus exiguus (Cestoda) as a parasite of Salmo gairdneri (Pisces). The cestode species Proteocephalus exiguus LA RUE, 1911, not found in Salmo gairdneri until now, is recorded from this host for the first time in the G.D.R. This species is described in detail and differentiated from P. neglectus. In addition to a list of findings from the lake Wolziger See in the south of Berlin, data on the incidence (up to 100% in our material) and the intensity of invasion (up to 40 helminths per fish) as well as on pathogenicity and therapy are given. Problems of species determination in the genus Proteocephalus, especially from Salmonidae and Coregonidae, and the distribution and bionomy of P. exiguus are discussed.

Animals↗
PubMed1982

[Larval development of Paricterotaenia porosa (Cestoda: Cyclophyllidea, Dilepididae) in dipterans of the genus Chironomus, experimental hosts. On comparative larval forms of dilepidid flatworms (author's transl)].

The authors describe the larval evolution of Paricterotaenia porosa (Rud., 1810) Fuhrmann (1932) (Cestoda: Cyclophyllidea, Dilepididae) in three species belonging to the genus Chironomus (Diptera, Nematocera) used as experimental hosts. The protoscolex of the infestant larva is retracted into a cystic vesicule, the cysticercoïd is surrounded by a fragmented cercomer and a capsule. P. porosa in contrary to P. paradoxa (Rud., 1802) do not present asexual reproduction in its intermediate host. P. porosa and Anomotaenia constricta (Molin, 1858) Cohn (1900) show a similar evolution, though the cercomer appears sooner in the former. These cysticercoïds are regarded as Monocercus Villot (1883) the characteristics of which are given. The Monocercus is specific to the Dilepididae. The other larval types described in this family i.e. Cercoscolex and Plerocercus (Jackera, 1970) Plerocercoïd (Freeman, 1973) ans Strobilo cysticercoïd (Freeman, 1973) are compared to the larva of other families: Proteocephalidae, Mesocestoididae and Amabiliidae respectively.

Animals↗
PubMed1980

[Fine aspects of the process of fertilization in Acanthobothrium filicolle Zschokke, 1888 (Cestoda: Tetraphyllidea, Onchobothriidae)].

The electron microscopy study of fertilization points out that in the Cestode Acanthobothrium filicolle, fertilization occurs in the oviduct. After the coiling of the spermatozoon around the oocyte, the plasma membrane of the sperm fuses with that of the ovum. All the elements of the spermatozoon (the nucleus, the two axonemes, the microtubules and the crested body pass into the cytoplasm of the oocyte). For the first time it is shown that the oocyte eliminates a residue of fertilization that could be the result either from the rejection of all the sperm organites (axonemes, microtubules, crested body) or the polyspermy or both. This fertilization residue comprising a degenerated nucleuslike body has been observed only in Onchobothriidae, Tetraphyllidea Cestoda.

Animals↗