| Helminth species | Size (㎛) | Morphological characteristics |
|---|---|---|
| Taenia spp.* | 30-45 in diameter | Round with thick shell, striated embryophore & hexacanth embryo |
| Hymenolepis nana | 30-47 in diameter | Round with transparent shell, hexacanth embryo with polar filaments |
| Hymenolepis diminuta | 70-80 in diameter | Round with thick shell, striated hexacanth embryo with polar thickening |
| Ascaris lumbricoides (F)† | 50-75 × 35-50 | Subspherical or round with mammilated protein coat & single blastomere |
| Ascaris lumbricoides (U)‡ | 80-90 × 40-45 | Elongated ellipsoidal with thin shell, thin protein coat & granules inside |
| Trichuris trichiura | 50-55 × 22-23 | Barrel shape with thick shell, polar mucoid plugs & single blastomere |
| Hookworms§ | 55-75 × 35-45 | Ovoid with hyaline thin shell & 4-8 cell stages |
| Trichostrongylus orientalis | 75-95 × 35-45 | Long elliptical with hyaline thin shell, & morular stages |
| Enterobius vermicularis | 50-60 × 20-30 | Persimmon stone shape with double layered shell & larva |
*T. asiatica, T. saginata and T. solium; †fertilized; ‡unfertilized eggs; §Ancylostoma duodenale and Necator americanus.