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Parasitology, Common Parasites (parasites pictures)

March 20, 2023Lab TestsParasitology

Table of Contents

  • Common Parasites
      • A short review of common Parasites.
  • Enterobius Vermicularis
  •  Ascaris Lumbricoides
  • Ancylostoma Duodenal
  •  Trichuris Trichiura
  • Giardia Lamblia
  • Entamoeba Histolytica
  •  Iodamoeba butschlii
  • Trichomonas vaginalis

Common Parasites

A short review of common Parasites.

Enterobius Vermicularis

  1. The ova is oval and asymmetric, with one side flattened.
  2. Size is 55 × 26 micrometers.
Common parasites: Pinworm egg with larva

Common parasites: Pinworm egg with larva

Common parasites: Pinworm eggs

Common parasites: Pinworm eggs

 Ascaris Lumbricoides

  1. The fertile ovum is 60 x 45 micrometers. It has a thick shell and is surrounded by an albuminous covering.
  2. The infertile ovum is 90 x 40 micrometers. This is surrounded by an irregular albuminous covering.
Common parasites: Ascaris lumbricoides egg

Common parasites: Ascaris lumbricoides egg

Fertilized Ovum

Fertilized Ovum

Ancylostoma Duodenal

  1. Ovum measures 60 to 65 x 40 micrometers. It is oval and has a thin shell.
  2. Usually, the embryo is at the four-cell stage.
Common parasites: Ankylostoma duodenal

Common parasites: Ankylostoma duodenal

 Trichuris Trichiura

  1. The ovum size is 52 x  23 micrometers.
  2. It is barrel-shaped with distinctive ends.
Common parasites: Trichuris Trichiura

Common parasites: Trichuris Trichiura

Giardia Lamblia

  1. Trophozoite form measures 12 to 15 micrometer. It is pyriform and has two nuclei.
  2. Trophozoite unstained shows progressive motility like a falling tree leaf.
  3. Trophozoite stained shows nuclei in the area of the sucking disc.
    1. There are two median bodies posterior to the disc.
  4. Cysts unstained are ovoid in shape,
    1. Stained cysts show 4 nuclei and four median bodies.
Common parasites: Giardia trophozoite

Common parasites: Giardia trophozoite

Common parasites: Giardia cyst

Common parasites: Giardia cyst

Entamoeba Histolytica

  1. Entamoeba Histolytica causes chronic dysentery.
Common parasites: E. Histolytica various stages of maturation

Common parasites: E. Histolytica, various stages of maturation

Common parasites: E. histolytica cyst

Common parasites: E. histolytica cyst

 Iodamoeba butschlii

  1. Iodamoeba butschlii has variable shapes.
  2. It is easily recognized in the iodine preparation.
Iodamoeba butschlii cyst

Iodamoeba butschlii cyst

Iodamoeba butschlii cyst with iodine preparation

Iodamoeba butschlii cyst with an iodine preparation

Trichomonas vaginalis

  1. It is motile due to the presence of anterior flagella.
  2. The movement is rapid and jerky.
Trichomonas vaginalis trophozoite

Trichomonas vaginalis trophozoite


Possible References Used
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