Entozoa, an introduction to the study of helminthology, with reference more particularly to the internal parasites of man

Cobbold, T. Spencer

doi:10.5962/bhl.title.46771

Cited by 8 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nematode genus Syphacia Seurat, 1916 (Oxyuridae Cobbold, 1864: Syphaciinae Railliet, 1916) members of which are colloquially often referred to as pinworms (Adamson, 1994; Grear and Hudson, 2011), is a cosmopolitan genus parasitizing rodents. Hugot (1988) separated the genus into three subgenera including Syphacia ( Syphacia ) comprising 14 species, all occurring in Cricetidae Fisher, 1817 or Muridae Illiger, 1811.…”

Section: Introductionmentioning

confidence: 99%

Parasitic nematodes of the genusSyphaciaSeurat, 1916 infecting Muridae in the British Isles, and the peculiar case ofSyphacia frederici

et al. 2017

View full text Add to dashboard Cite

Syphacia stroma (von Linstow, 1884) Morgan, 1932 and Syphacia frederici Roman, 1945 are oxyurid nematodes that parasitize two murid rodents, Apodemus sylvaticus and Apodemus flavicollis, on the European mainland. Only S. stroma has been recorded previously in Apodemus spp. from the British Isles. Despite the paucity of earlier reports, we identified S. frederici in four disparate British sites, two in Nottinghamshire, one each in Berkshire and Anglesey, Wales. Identification was based on their site in the host (caecum and not small intestine), on key morphological criteria that differentiate this species from S. stroma (in particular the tail of female worms) and by sequencing two genetic loci (cytochrome C oxidase 1 gene and a section of ribosomal DNA). Sequences derived from both genetic loci of putative British S. frederici isolates formed a tight clade with sequences from continental worms known to be S. frederici, clearly distinguishing these isolates from S. stroma which formed a tight clade of its own, distinct from clades representative of Syphacia obvelata from Mus and S. muris from Rattus. The data in this paper therefore constitute the first record of S. frederici from British wood mice, and confirm the status of this species as distinct from both S. obvelata and S. stroma.

show abstract

Section: Introductionmentioning

confidence: 99%

Parasitic nematodes of the genusSyphaciaSeurat, 1916 infecting Muridae in the British Isles, and the peculiar case ofSyphacia frederici

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Rudolphi's rejection of previous specific names for these two parasites in favour of mystax and marginata was accepted by Diesing (1851) and Cobbold (1864). Leuckart (1876, p. 258) believed that differences in the cervical alae were artificial and due to different methods of fixation; he regarded the ascaridids of both dogs and cats as one species, Ascaris mystax, and this was accepted by Neumann (1892), Moniez (1896) and Stossich (1896).…”

mentioning

confidence: 99%

The life history and development ofToxocara cati(Schrank 1788) in the domestic cat

Sprent

1956

Parasitology

119

View full text Add to dashboard Cite

1. An account is given of the history, synonymy and host-range of Toxocara cati.2. Eggs of T. cati were fed to various animals, and the second-stage larvae were found in the tissues of earthworms, cockroaches, chickens, mice, dogs, lambs and cats.3. Cats were successfully infected by feeding eggs of T. cati and by feeding mice harbouring larvae in the tissues.4. In egg-infected cats the larvae were found in the liver, lungs, muscles and tracheal washings as well as in the digestive tract, indicating that they migrate through the tissues.5. In mice the larvae were found in the liver, lungs and muscles, but did not reach the alimentary tract. Changes occurred in the mouth region of the larvae in mouse tissues between 8 and 11 days after infection, but no actual moult was observed. No significant growth of the larvae was observed in mouse tissues.6. In mouse-infected cats the larvae were mostly confined to the wall and contents of the digestive tract.7. It appeared that the second moult occurred in the stomach wall of egg-infected cats at 3–10 days after infection; moulting larvae measuring 0·353–0·423 mm. in length; in a mouse-infected cat moulting larvae (length 0·459–0·765 mm.) were observed at 6 days after infection.8. In both egg- and mouse-infected cats the third-stage larvae grew in the stomach wall and moulted for the third time at a length of 0·9–1·2 mm. This occurred at about 10 days in mouse-infected cats and at about 19 days in egg-infected cats.9. The smallest fourth-stage larvae were found in the stomach contents whence they passed into the intestine. Probably they are at first attached to the wall and later become free in the intestinal contents.10. The fourth-stage larvae have lips resembling the adult; sexual differentiation occurs during this stage, being first evident at 1·5 mm.11. The fourth moult occurs in the intestine at a length of approximately 4·5–5·5 mm.12. In the adult stage the lateral alae gradually disappear and the cervical alae reach the adult form at a length of approximately 45 mm. The smallest female observed containing eggs in the vagina measured 55 mm. in length. Eggs were first observed in the faeces at 56 days after infection by eggs.13. The evidence from experimental and natural infection indicated that infection of cats with T. cati always takes place after birth.14. No larvae were found in the alimentary tract of dogs following experimental infection either with eggs or with infected mice.15. The relationship of the life history of T. cati to that of other ascaridid species, to the feeding habits of the definitive hosts, and in relation to the occurrence of human infection with this parasite is discussed.

show abstract

“…The nucleotide difference between T. ovis ovis and T. asiatica is 13.6% that is lesser than the corresponding difference between T. ovis ovis and T. ovis krabbei . Therefore, based on the present molecular, biological, morphological and intermediate host differences (Lavikainen et al, 2008), the two subspecies could be considered distinct species as T. ovis (Cobbold, 1869) (Ransom, 1913), and Taenia krabbei (Moniez, 1879). Likewise in other taeniid species, e.g.…”

Section: Discussionmentioning

confidence: 97%

Genetic and morphometric categorization ofTaenia ovisfrom Sheep in Iran

et al. 2018

View full text Add to dashboard Cite

Little is known about the genetic and morphological characters of Taenia ovis. The purpose of the present study was to characterize sheep isolates of T. ovis using rostellar hook morphometry as well as mitochondrial genes sequence analysis. Ninety sheep specimens of Cysticercus ovis were collected from 18 slaughterhouses in Iran. The mean ± s.d. for total length of large and small hooks were 174.1 ± 6.4 and 116.7 ± 5.4 µm, respectively. CO1 and 12S rRNA sequence analysis showed 11 and nine haplotypes, respectively. The level of pairwise nucleotide variations between individual haplotypes of CO1 and 12S rRNA genes were 0.3–1.1 and 0.2–1.0%, respectively. Level of nucleotide variation in CO1 and 12S rRNA between T. ovis haplotypes from present study and eight other Taenia species was found to be 11.3–17.8 and 5.3–16.3%, respectively. Phylogenetic analysis clustered all T. ovis isolates into a single clade comprised of the all CO1 and 12S rRNA haplotypes. CO1 nucleotide difference between T. ovis ovis and T. asiatica was 13.6% that is lesser than the corresponding difference between T. ovis ovis and T. ovis krabbei, warranting the designation of two separate species as T. ovis and T. krabbei. Interclass correlation coefficients showed that there was no significant association between rostellar hook length variation and the variability of the mitochondrial genes.

show abstract

Entozoa, an introduction to the study of helminthology, with reference more particularly to the internal parasites of man

Cited by 8 publications

References 0 publications

Parasitic nematodes of the genusSyphaciaSeurat, 1916 infecting Muridae in the British Isles, and the peculiar case ofSyphacia frederici

Parasitic nematodes of the genusSyphaciaSeurat, 1916 infecting Muridae in the British Isles, and the peculiar case ofSyphacia frederici

The life history and development ofToxocara cati(Schrank 1788) in the domestic cat

Genetic and morphometric categorization ofTaenia ovisfrom Sheep in Iran

Contact Info

Product

Resources

About