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An unusual over-gravid female of Enterobius vermicularis recovered from a child
J Y Chai,*1E T Han,1J L Kim,1A S Kim,2 and J C Kang2
1Department of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul 110-799, Korea.
Received June 23, 1997; Accepted July 04, 1997.
Abstract
An unusual over-gravid female of Enterobius vermicularis was recovered from a 15-month old child by cello-tape anal swab. The patient resided in Inchon and complained of severe anal itching. The worm measured 7.8 mm in length and 0.5 mm in width, and retained typical morphologic features of E. vermicularis such as cephalic alae and a sharply pointed posterior end. In this gravid female, peculiarly, the uterus was tremendously distended, and about 99% of the whole body length was completely packed with a great number of eggs. Other internal organs were difficult to observe. This paper describes a peculiar over-gravid female of E. vermicularis.
Figures
Figs. 1-5 Fig. 1. The over-gravid female of E. vermicularis collected from the child. Bar=1mm. Fig. 2. Posterior end of the over-gravid female. Note the long pointed tail (arrow). Bar=5 µm. Fig. 3. Anterior part of the worm. Note the swollen cuticle, cephalic alae, at the head portion (arrows). Bar=10 µm. Fig. 4. The vulva opening (arrow) of the worm. Bar=10 µm. Fig. 5. An egg liberated from the vagina of this worm. Bar=20 µm.
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