Skip to main content Accessibility help
×
Home

Morphological observations and the effects of artificial digestive fluids on the survival of Diploscapter coronata from a Japanese patient

  • N. Morimoto (a1), M. Korenaga (a2), K. Yagyu (a3), N. Kagei (a4), M. Fujieda (a5), O. Bain (a6), H. Wakiguchi (a5), Y. Hashiguchi (a2) and T. Sugiura (a1)...

Abstract

Unusual non-human parasitic nematodes and eggs were detected in the faeces of an 8-year-old Japanese female suffering from Henoch-Schönlein purpura. The worms were adult female rhabditiform nematodes measuring 325.6–441.2 μm in length and 18.3–26.5 μm in width. One pair of the labia oris was notched with many spiny projections, while the other pair was strongly curved outwards. The worms were identified using light and scanning electron microscopy as the free-living nematode Diploscapter coronata (Cobb) based on their characteristic morphology. The patient's faeces containing worms and eggs were cultured using a filter-paper culture technique and after 7 days of culture, male as well as female worms were recovered. Worm survival time and hatchability of the eggs were examined in vitro after treatment with an artificial gastric or intestinal fluid. Although adult worms survived for less than one minute, eggs hatched after treatment with artificial gastric fluid. This suggests that eggs accidentally ingested or produced by adult D. coronata could develop in the human gastro-intestinal tract. Some morphological features of male D. coronata are also described.

Copyright

Corresponding author

*Corresponding author: Fax: +81 88 880 2462, Email: morimoto@med.kochi-u.ac.jp

References

Hide All
Anderson, R.C. & Bain, O. (1982) Keys to genera of the superfamilies Rhabditoidea, Dioctophymatoidea, Trichinelloidea and Muspiceoidea. pp. 126in Anderson, R.C., Chabaud, A.G. & Willmott, S. (Eds) CHI Keys to the nematode parasites of vertebrates. Farnham Royal, England, Commonwealth Agricultural Bureaux.
Beaver, P.C., Jung, R.C. & Cupp, E.W. (1984) 263 pp. Clinical parasitology. 9th edn.. Philadelphia, Lea & Febiger.
Chandler, A.C. (1938) Diploscapter coronata as a facultative parasite of man, with a general review of vertebrate parasitism by rhabditoid worms. Parasitology 30, 4455.
Cobb, N.A. (1893) Nematodes, mostly Australian and Fijian. Department of Agriculture, NSW, Miscellaneous Publication 13, 359.
Cobb, N.A. (1913) New nematode genera found inhabiting fresh water and non-brackish soils. Journal of the Washington Academy of Sciences 3, 432444.
Harada, Y. & Mori, O. (1951) A simple culture technic for hookworm eggs. Igaku to Seibutsugaku 20, 6567.(in Japanese)
Maupas, E. (1900) Modes et formes de reproduction des nématodes. Archives de Zoologie Expérimentale et Générale. 3rd sér 8, 463624. (in French)
Rai, A., Nast, C. & Adler, S. (1999) Henoch-Schönlein purpura nephritis. Journal of the American Society of Nephrology 10, 26372644.
Saulsbury, F.T. (1999) Henoch-Schönlein purpura in children. Report of 100 patients and review of the literature. Medicine (Baltimore) 78, 395409.
Sheather, A.L. (1923) The detection of intestinal protozoa and mange parasites by a flotation technique. Journal of Comparative Pathology 36, 266275.
Witenberg, G. (1951) Some unusual observations on helminthiasis in Israel. Harefuah 41, 178180.
Yokogawa, S. (1936) A human case of accidental parasitism of Diploscapter coronata (Cobb, 1893) Cobb, 1913. Zoological Magazine, Tokyo 48, 507512. (in Japanese with English summary)

Related content

Powered by UNSILO

Morphological observations and the effects of artificial digestive fluids on the survival of Diploscapter coronata from a Japanese patient

  • N. Morimoto (a1), M. Korenaga (a2), K. Yagyu (a3), N. Kagei (a4), M. Fujieda (a5), O. Bain (a6), H. Wakiguchi (a5), Y. Hashiguchi (a2) and T. Sugiura (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.