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Am. J. Trop. Med. Hyg., 29(6), 1980, pp. 1246-1248
Copyright © 1980 by The American Society of Tropical Medicine and Hygiene

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The Circumoval Precipitin Reaction on Schistosoma Mansoni Eggs as Seen by Scanning Electron Microscopy*

John W. Ford, George V. Hillyer AND Thomas G. Connelly
Department of Anatomy and Center for Human Growth and Development, Medical Science II Building, University of Michigan School of Medicine, Ann Arbor, Michigan 48109, and Laboratory of Parasite Immunology, Department of Biology, University of Puerto Rico, Rio Piedras, Puerto Rico 00931

The circumoval precipitin reaction on Schistosoma mansoni eggs was examined for the first time by scanning electron microscopy. The precipitates appeared as layered segmenters, and apparent fusion of adjacent precipitates was observed. This suggests that the single precipitates seen by light microscopy may on occasion be a collection of several precipitates exuding from nearby pores. The precipitates appeared on all areas of the egg surface except the spine.

Accepted for publication March 1, 1980.


* Address reprint requests to: Dr. George V. Hillyer, Laboratory of Parasite Immunology, Department of Biology, University of Puerto Rico, Rio Piedras, Puerto Rico 00931.







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Copyright © 1980 by the American Society of Tropical Medicine and Hygiene.