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At least 73 records · Page 4Linked to original sources
PubMed1994

Choanotaenia atopa n. sp. (Cestoda: Dilepididae) from a domestic cat in Kansas.

Choanotaenia atopa (Cestoda: Dilepididae) is described (host: domestic cat from the vicinity of Manhattan, Kansas); its natural host is presumed to be a rodent. Choanotaenia atopa is morphologically similar to cestodes of 6 species, all from rodents, formerly placed in the genus Rodentotaenia Matevosian, 1953, and subsequently removed to the genera Choanotaenia Railliet, 1986, or Monopylidium Fuhrmann, 1899. The systematic position of those cestodes is discussed; Monopylidium and Rodentotaenia are treated as synonyms of Choanotaenia. Choanotaenia atopa is distinguished by size and form of rostellar hooks, regularly alternating genital pores, and other characters in genital organs.

Animals↗
PubMed1977

Aploparaksis borealis sp. n. (Cestoda: Hymenolepididae) from passeriform and charadriiform birds in Chukotka and Alaska.

Aploparaksis borealis sp. n. (Cestoda: Hymenolepididae), from the long-tailed jaeger, Stercorarisu longicaudus Vieillot, on the Seward Peninsula, Alaska, and from the red-throated pipit, Anthus cervinus (Pallas), and the Lapland longspur, Calcarius lapponicus (Linnaeus), in Chukotka, northestern Siberia, is described. This cestode is distinguished by the structure of the cirrus and other morphologic characters from other species of Aploparaksis Clerc 1903 in which there are 10 rostellar hooks and the vitelline gland is aporal to the ovary. A. borealis is the first species of Aploparaksis to be reported from birds representing 2 orders (Passeriformes and Charadriiformes).

Alaska↗
PubMed1995

Cyathocephalus truncatus (Cestoda: Spathebothridea) in its intermediate host Echinogammarus stammeri (Amphipoda) from the River Brenta, northern Italy.

A study was carried out on the occurrence of the tapeworm Cyathocephalus truncatus (Pallas, 1781) (Cestoda: Spathebothridea) in its intermediate host, the amphipod Echinogammarus stammeri, in the River Brenta. A total of 18,860 E. stammeri was examined from July 1990 to June 1994; only 25 of them (prevalence 0.13%) were infected with tapeworm larvae (intensity of infection 1 larva/host). Co-occurrence of C. truncatus larvae with the larva of the acanthocephalan Pomphorhynchus laevis (Müller, 1776) was recorded in 15 amphipods. Tapeworms were localized in the anterior portion of each amphipod's hemocoel, in intimate contact with E. stammeri internal organs such as the alimentary canal, and frequently induced its displacement. No differences in integumental pigmentation were noticed between infected and non-infected amphipods, and some infected E. stammeri females were ovigerous.

Acanthocephala↗
PubMedDate not supplied

[Experimental study of the larval development of Hymenolepis stylosa (Rudolphi, 1809), Raillet, 1899 (Cestoda : cyelophyllidea) (author's transl)].

Comparative studies of the larval development of Hymenolepis stylosa Rudolphi, 1809 (Cestoda : Cyclophyllidea), a parasite of Corvid birds are undertaken from three insect species. The development in the beetle, Tenebrio molitor shows that the scolex differenciation occurs before the invagination of the metacestode in the cystic vesicle. The cercomer is long, narrow and flexuous. In the grasshopper, Lousta migratoria, the development is the same one but the scolex invaganation begins early. In another beetle, Dermestes frischi, the oncosphere is stopped in the gut-wall. The morphology and development of the cysticercoids of avian species of Hymenolepis, which have a well known life cycle, are similar. Studies on the structure of the larval stages of avian and mammal species of Hymenolepis seem necessary to find the relations between the different species of this genus.

Animals↗
PubMed1977

Monoecocestus thomasi sp. n. (Cestoda: Anoplocephalidae) from the northern flying squirrel, Glaucomys sabrinus (Shaw), in Oregon.

Monoecocestus thomasi sp. n. (Cestoda: Anoplocephalidae), from the northern flying squirrel, Glaucomys sabrinus (Shaw), in Oregon, is described and distinguished from its congeners. Monoecocestus thomasi is the sixth species of Monoecocestus to be described from nearctic rodents, and the first from a member of the family Sciuridae. Our comparisons of taxonomic characters of the nominal species of Monoecocestus in North American rodents have shown that M. giganticus Buhler 1970 is a synonym of M. americanus (Stiles 1895), both from the porcupine, Erethizon dorsatum (Linnaeus). Insemination in Monoecocestus ssp. is discussed, with the conclusion that it takes place only by way of the vagina in early immature segments.

Animals↗
PubMed2006

Spermatological characters in Diphyllobothrium latum (Cestoda, Pseudophyllidea).

Spermiogenesis and the ultrastructural features of the spermatozoon of Diphyllobothrium latum (Cestoda, Pseudophyllidea) are described using transmission electron microscopy. Spermiogenesis is characterized by the development of two flagella of unequal length that grow asynchronously. When the first growing flagellum starts to rotate, the second one develops. Flagellar rotation is thus asymmetric and asynchronic. It is followed by proximodistal fusion with the median cytoplasmic process. Electron-dense material is present in the apical region of the zone of differentiation in the early stages of spermiogenesis. The intercentriolar body consists of seven plates: three are electron-dense. Four attachment zones occur in the median cytoplasmic process. An atypical arrangement of striated roots was occasionally observed. The mature spermatozoon possesses two axonemes of 9 + "1" trepaxonematan pattern, nucleus, cortical microtubules, electron-dense granules, and lacks mitochondria. The ultrastructure of the anterior extremity of the spermatozoon in D. latum clearly differs from that in the bothriocephalid pseudophyllideans, mainly in the absence of a crested body and a ring of electron-dense tubular structures. The spermatological data support the assumption that the order Pseudophyllidea is formed by two unrelated clades, "Bothriocephalidea" and "Diphyllobothriidea."

Animals↗
PubMed2002

Single-strand conformation polymorphism-based analysis reveals genetic variation within Spirometra erinacei (Cestoda: Pseudophyllidea) from Australia.

This study examined genetic variability within Spirometra erinacei (Cestoda: Pseudophyllidea) from different host species and geographical origins in Australia using a polymerase chain reaction (PCR)-based mutation detection approach, followed by DNA sequencing. Part of the cytochrome c oxidase subunit 1 gene (p cox 1) was amplified by PCR, scanned for sequence variation by single-strand conformation polymorphism (SSCP), and representative samples from different host species were selected for DNA sequencing. While no variation in SSCP profiles was detected among S. erinacei samples from dog, fox, cat, tiger snake and python, they differed in profile from 5 specimens from the green tree frog (Litoria caerulea). This was supported by sequence data which demonstrated that p cox 1 sequences of samples from the latter host species differed at 8 of 393 (2%) nucleotide positions from those from the non-amphibian host. Using a nucleotide difference in the p cox 1 sequence, a PCR-linked restriction fragment length polymorphism (RFLP) could be employed to unequivocally delineate between samples from non-amphibian and amphibian hosts. These findings demonstrate the existence of at least two genotypes within S. erinacei, which may have important implications for studying the epidemiology, ecology and systematics of this cestode.

Animals↗
PubMed2003

Echinococcus multilocularis (Cestoda, Taeniidae) in Red foxes (Vulpes vulpes) in northern Belgium.

The first record of the tapeworm Echinococcus multilocularis (Cestoda, Taeniidae) in Red foxes (Vulpes vulpes) in northern Belgium is described. Between 1996 and 1999, 237 dead foxes were examined for the presence of this tapeworm using the intestinal scraping technique. Four foxes (1.7%) were found to be infected with E. multilocularis and showed medium to very high parasitic burdens. Three infected foxes originated from the south of the study area and the fourth animal came from the north of the study area near the border with The Netherlands. These findings are discussed in relation to the high endemicity of E. multilocularis in southern Belgium and to the increased distribution of the Red fox (V. vulpes) in northern Belgium during the last two decades.

Animals↗
PubMed1979

Vitamin absorption in the in vivo intestine of normal and infected (Hymenolepis diminuta: Cestoda) rats.

Uptake and serosal transfer of the vitamins thiamine, riboflavin and folic acid have been studied in vivo in normal and parasitized rats infected with Hymenolepis diminuta (Cestoda). Regional differences in intestinal uptake of all three vitamins in both uninfected and parasitized animals were not satistically significant. In the parasitized intestine mucosal uptake and serosal transfer of thiamine were significantly inhibited, with increased mucosal accumulation of the vitamin as luminal thiamine concentration increased. Apparent increased riboflavin mucosal uptake in parasitized animals, was not matched by the reduced serosal transfer, suggesting adsorption of the vitamin in the unstirred aqueous layers. Mucosal uptake of folic acid increased in the parasitized gut; serosal transfer and mucosal accumulation were not affected. These results, indicating vitamin malabsorption associated with infection by H. diminuta, are consistent with the parasite inhibiting mucosal passive transport mechanisms. This conclusion is supported by the changes in net water fluxes associated with vitamin uptake in the parasitized intestine.

Animals↗
PubMed1981

Taenia saginata (Cestoda) in western Kenya: the reliability of faecal examinations in diagnosis.

The prevalence of Taenia saginata (Cestoda) among 146 predominantly Pokot tribesmen in western Kenya was studied in an attempt to assess the reliability of detecting infections by faecal examinations. firstly, a single faecal sample was microscopically examined after being processed by a standard ether sedimentation technique. Secondly, all subjects were treated with niclosamide and a purgative and the tapeworms were recovered. In this way the efficiency of diagnosing infections by faecal examinations was estimated. T. saginata eggs were found in the faeces of 68% of the men who were eventually found to be infected. Information was collected by interview from all subjects about whether they were or ever had been infected with tapeworms and about the form of treatment previously sought or taken. Eleven out of 25 men were apparently unaware of their tapeworm infections while no evidence of infection was found among 10 of the 24 reportedly infected men. A change in the pattern of treatment for tapeworms was reported which may have resulted in a recent decline in the prevalence of infection.

Adult↗
PubMed1999

Breeding systems in Echinococcus granulosus (Cestoda; Taeniidae): selfing or outcrossing?

We used the PCR-SSCP method followed by sequencing in order to assess the genetic variability of coding and noncoding parts of the genome of Echinococcus granulosus (Cestoda; Taeniidae) and to test whether or not the parasite populations are mainly self-fertilizing. For this, we analysed a sample of 110 E. granulosus metacestode isolates collected from different geographical regions (Southern Brazil, Europe and Australia) and from different intermediate hosts (ovine, bovine, human, macropod, swine and equine). Using appropriate controls, we were able to identify 4 strains in that sample (sheep, cattle, pig and horse strains). The high degree of genetic differentiation between strains, but not within, and the monomorphism found in most loci (EgAg4, EgActII, EgHbx2 and EgAg6-non-coding-EgAgB/1 and EgND1-coding) indicated that they are largely selfed. On the other hand, outcrossing was also shown to occur, since 5 potential hybrid genotypes between cattle and sheep strains were found in populations of Southern Brazil, but absent in other geographical areas. We suggest that both processes are adaptive. The article also reports, for the first time, the occurrence of the E. granulosus cattle strain in South America.

Animals↗
PubMed1986

[Description of Hymenolepis cerberensis n. sp. (Cestoda: Hymenolepididae) and first general considerations on the fauna of cestode parasites of the pygmy shrew Suncus etruscus (Savi, 1822) (Insectivora: Soricidae)].

Description and differentiation of the adult stage of Hymenolepis cerberensis n. sp. (Cestoda: Hymenolepididae), an intestinal parasite of the Pygmy white-toothed shrew, Suncus etruscus (Savi, 1822) (Insectivora: Soricidae: Crocidurinae) in the region of Banyuls-sur-Mer and Cerbère (Oriental Pyrenees, France). The new species is characterized by the size of the gravid specimens and by the presence of 18-21 rostellar hooks of 18.5-20 micron and of filaments around the embryophore. The general composition of the fauna of Cyclophyllidea parasitizing S. etruscus is analysed. There are three less specialised Hymenolepis species with a scolex of the same type and one Pseudhymenolepis species, with the absence of unarmed species lacking a rostrum. The oioxenous character of the Cestodes parasitizing Suncus species sustains the validity of the genus Suncus. The resemblance of the Cestodefaunas suggests a narrow phyletic relationship between the genera Suncus and Crocidura.

Animals↗