Morphometric variability of Schistosoma intercalatum eggs: a diagnostic dilemma

Journal of Helminthology
J AlmedaD Rollinson

Abstract

Variability of Schistosoma intercalatum eggs in shape and size, and their similarity to those of S. haematobium presented a problem of species identification when egg morphology was the diagnostic criterion used in a study of human schistosomiasis conducted on São Tomé and Principe. More than 2500 egg measurements were obtained by light micoscopy to gather data relating to size variability of S. intercalatum eggs, to evaluate whether factors such as age of host, sex of host and intensity of infection are correlated with variability, and the data were compared with previously published measurements on different isolates and strains of S. intercalatum: the range in length (104-203 microns) embraces most of the measurements reported in other studies of S. intercalatum eggs. There was no correlation either between age and sex of the host, or intensity of infection with variability of egg size. Comparison between measurements of the eggs of S. haematobium, S. intercalatum and S. bovis eggs are presented.

References

Jul 1, 1992·The American Journal of Tropical Medicine and Hygiene·M CorachanJ Gascon
Sep 1, 1991·The American Journal of Tropical Medicine and Hygiene·R C Ratard, G J Greer
Jan 1, 1989·Transactions of the Royal Society of Tropical Medicine and Hygiene·R RomeroM Luis
Mar 1, 1988·Medical Education·C R Coles, B Mountford
Jan 1, 1972·Journal of Helminthology·R L Muller, M G Taylor
Jan 1, 1972·Transactions of the Royal Society of Tropical Medicine and Hygiene·C A WrightR J Knowles
Jan 1, 1970·Journal of Helminthology·M G Taylor
Jan 1, 1984·Zeitschrift Für Parasitenkunde·D S BrownR J Knowles
Jan 1, 1980·Zeitschrift Für Parasitenkunde·V R SouthgateR J Knowles
Jul 1, 1994·Transactions of the Royal Society of Tropical Medicine and Hygiene·J AlmedaV R Southgate
Jul 1, 1994·Transactions of the Royal Society of Tropical Medicine and Hygiene·V R SouthgateM Corachan
Nov 1, 1994·Transactions of the Royal Society of Tropical Medicine and Hygiene·D De ClercqJ Vercruysse

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