Hostname: page-component-848d4c4894-ndmmz Total loading time: 0 Render date: 2024-05-17T18:39:12.723Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on Onchocerca cervicalis Railliet and Henry 1910: 3. Morphological and taxonomic studies on Onchocerca cervicalis from British horses

Published online by Cambridge University Press:  05 June 2009

Philip S. Mellor
Philip S. Mellor
Affiliation:
Winches Farm Field Station, London School of Hygiene and Tropical Medicine, St. Albans, Hertfordshire*
Get access Rights & Permissions [Opens in a new window]

Abstract

Distinct morphological differences were found between microfilariae of Onchocerca cervicalis in the uterus of the adult and those in the skin of the horse, suggesting that development occurs during migration from the adult worm to the skin.

Uterine microfilariae can be divided into two types which represent stages of development not embryonic male and female worms.

Skin microfilariae of O. cervicalis were readily distinguishable from those of O. volvulus and O. gutturosa. Morphological comparisons between adult and larval O. cervicalis collected during this project with published descriptions of O. reticulata show that there is insufficient evidence for their specific separation.

The first two papers in this series have dealt with the prevalence of Onchocerca cervicalis in British horses and with the pathology caused by the parasite to the definitive host. The present paper is concerned with the morphology and taxonomy of the parasite, particularly the microfilarial stage.

Type
Research Article
Information
Journal of Helminthology , Volume 48 , Issue 2 , June 1974 , pp. 145 - 153
Copyright
Copyright © Cambridge University Press 1974

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Ackert, J. E. and O'Neal, W. S. (1930) Parasitism and fistulous withers. J. Am. vet. med. Ass.., 77, 28.Google Scholar
Bain, O. (1969) Morphologie des stades larvaires d'Onchocerca volvulus chez Simulium damnosum et redescription de la microfilariae. Ann. Parasit. hum. comp., 44, 69.CrossRefGoogle Scholar
Berdnik, O. A. (1958) Validity of Onchocerca cervicalis and O. reticulata. Uzbek. Biol., 5, 59.Google Scholar
Blacklock, D. B. (1926) The development of Onchocerca volvulus in Simulium damnosum. Ann. trop. Med.Parasit., 20, 1.CrossRefGoogle Scholar
Caballero, C. E. (1945) Estudios helmintologicos de la region onchocercosa de Mexico y de la Republica de Guatemala. Nematoda 3rd. parte. Filarioidea II, el genero, onchocercoe. Ann. Inst. Biol. Mexico., 16, 367.Google Scholar
Caballero, C. E. (1951) Helminthological studies of the Onchocerca bearing region of Mexico and Guatemala, Part 6a. Ann. Inst. Biol. Mexico., 22, 141.Google Scholar
Caslick, E. A. (1923) Further study of a parasite found in the ligamentum nuchae of equines. Rep. N.Y. St. vet. Coll.., for 1921–1922. Legal Document No. 32.Google Scholar
Diesing, K. M. (1841) O. reticulata (footnote to, Hermann, J. 1841; Oesterr. Med. Schnschr. 9, 200).Google Scholar
Eichler, D. A. and Nelson, G. S. (1971) Studies on Onchocerca gutturosa (Neumann 1910) and its development in Simulium ornatum (Meigen 1818). I. Observations on O. gutturosa in cattle in South-East England. J. Helminth., 45, 245.CrossRefGoogle ScholarPubMed
Faust, E. C. (1949) Human helminthology: a manual for physicians, sanitarians and medical zoologists. London: Henry Kimpton, 3rd. ed. 744 pp.Google Scholar
Funnikova, S. V. (1954) Differential diagnosis of larvae of Onchocerca from horses. Trudi. Kaz. Nauchno-Issl. vet. Inst., 12, 311.Google Scholar
Gibson, C. L. (1952) Comparative morphology of skin inhabiting microfilariae of man, cattle and equines in Guatemala. Am.J. Trop. Med. Hyg., 1, 250.CrossRefGoogle ScholarPubMed
Le Roux, P. L. (1950) Onchocerca cervicalis R. and H. 1910, is a doubtful synonym of O. reticulata Dicsing, (in Hermann, J.) 1841. Trans. R. Soc. trop. Med. Hyg., 44, 5.Google Scholar
Mellor, P. S. (1973) Studies on Onchocerca cervicalis Railliet and Henry 1910:I. Onchocerca cervicalis in British horses. J. Helminth., 47, 97.CrossRefGoogle ScholarPubMed
Moignoux, J. B. (1952) Sur l'identite des deux especes d'Onchocerca: O. retculata Diesing 1841 et O. cervicalis Rail, and Henry 1910. Etude biologique comparative. C.R. Soc. Biolg., 146, 573.Google Scholar
Neumann, L. G. (1892) In A Treatise on the Parasites and Parasitic Diseases of the Domesticated Animals (ed.Flemming, G.) London.Google Scholar
Pader, J. (1901) Filariose du ligament suspenseur du boulet chez le cheval. Archs. Parasit.., 4, 58.Google Scholar
Railliet, A. and Henry, A. (1910) Les onchocerques, nematodes parasites du tissue conjonctif. C.R. Seanc. Soc. Biol, 68, 248.Google Scholar
Steward, J. S. (1933) Onchocerca cervicalis (Railliet and Henry 1910) and its development in Culicoides nubeculosus Meigen. Cam. Univ. Inst. Anim. Path. 3rd. Rep., 272.Google Scholar
Steward, J. S. (1935) Fistulous withers and poll evil. Vet. Rec., 15, 1563.Google Scholar
Steward, J. S. (1937) The occurrence of Onchocerca gutturosa Neumann in cattle in England, with an account of its life-history and development in Simulium ornatum Meigen. Parasitology, 29, 212.Google Scholar
Strong, R.P., Becquaert, J.C., Sandground, J.D. and Munoz, O. M. (1934) Onchocercosis, with special reference to the central American form of the disease. Harvard University Press. 234 pp.Google Scholar
Van Vokenberg, H. L. (1922) Calcification of the ligamentum nuchae. Cornell Vet., 12, 55.Google Scholar