Morphological observation experiment on short membranous shell tapeworm

Summary

This experiment is from the official website of Parasitology, School of Medicine, Shandong University.

Operation method

Morphological observation experiment on short membranous shell tapeworm

Principle

Adult microscopic membranous tapeworms parasitize the small intestine of rodents or humans, and the detached segments or eggs are then excreted in the feces; if swallowed by a new host, the eggs hatch in the intestine as hexacoccidiae, which develop into adult worms after a cysticercus-like stage. Adult human parasites can proliferate due to self-infection.

Move

I. Self-observation

Short small membrane shell tapeworm egg slide specimen: first low magnification to find (aperture can be appropriately narrowed), after finding a change in the high lens to observe. The eggs are ellipsoidal or spherical, about 37×47 microns in size, colorless and transparent, with an egg shell outside and an embryonic membrane inside, and a protrusion at each end of the embryonic membrane called the pole. From each of the two poles issued 4 to 8 polar filaments. The egg contains six hooked larvae.

II. Demonstration

Adult short tapeworm: 10-25 mm long, about 1 mm wide, with a total of 100-200 segments. The head of the tapeworm is spherical or rhombic, with four suckers and a telescoping terminal protuberance with a ring of small hooks.

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