AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 24(2), 1975, pp. 284-288
Copyright © 1975 by The American Society of Tropical Medicine and Hygiene

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The Relation of Worm Burden to Passage of Schistosoma haematobium Eggs in the Urine of Infected Patients*

Allen W. Cheever, A. Hazem Torky AND Mahmoud Shirbiney
Department of Pathology, Naval Medical Research Unit No. 3, F. P. O. New York 09527, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20014, and Department of Urology, Faculty of Medicine, Cairo University, Cairo, U. A. R.

Patients scheduled for cystectomy for bladder carcinoma or exstrophy of the bladder were studied. The number of eggs per day passed in the urine preoperatively was compared with the number of worms recovered from the cystectomy specimen by dissection. A mean of 203 embryonated Schistosoma haematobium eggs per day per worm pair were recovered from the urine of active, untreated cases. The relation between the number of S. haematobium females recovered and the number of living eggs passed in the urine was questionably significant. The correlation between S. haematobium females and all eggs (living and dead) passed in the urine was somewhat better. Several S. mansoni females were recovered from one specimen. This patient passed 139 embryonated S. mansoni eggs per day in the urine for each female worm recovered. Only one active case, treated 6 weeks before operation, might have been missed on routine parasitological examination of the urine.

Accepted for publication July 27, 1974.


* This work was partly supported by the U. S. Navy, Bureau of Medicine and Surgery Work Unit No. MR041.20.01-0328A2GX. The opinions and assertions in this scientific report are those of the authors and do not necessarily reflect the official views of the Naval Department or the naval service at large.

Address reprint requests to: Research Librarian, NAMRU-3, FPO New York 09527.






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Copyright © 1975 by the American Society of Tropical Medicine and Hygiene.