General Parasitology and Helminthology: Eggs of nematode

Eggs of nematode

EGGS OF NEMATODE

Nematodes are oviparous or ovoviviparous or viviparous.
Oviparous: Nematodes that lay eggs which contains only yolk material when laid. Eg. Ascarid.
Ovoviviparous: Nematode that lay eggs it contains fully developed larvae when laid. Eg. Subulura brumpti.
Viviparous: Giving birth to larvae. Eg. Filarid nematode.
The larvae of filarid nematode is called as Microfilaria.
Nematode eggs vary greatly in shape and size. Usually they are round, oval and ellipsoidal in shape and covered with 3 layers. In some species, the middle layer is interrupted with operculum or plug. The plug may be occur at one end or at both the ends of egg.
Eg. Plug at one end – Oxyuris equi. Plug at both end – Trichuris ovis.

Last modified: Saturday, 24 September 2011, 4:49 AM

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VPA 211: General Veterinary Parasitology and Helminthology (3+1)

Eggs of nematode

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