Parasites Affecting Hepatobiliary And Gastrointestinal Tract Parasites Helminths
Parasites Affecting Hepatobiliary And Gastrointestinal Tract
Parasites Helminths (parasitic worms) Phylum Platyhelminthes Class Trematoda Class Cestoidea Fasciola hepatica Fasciola gigantica Heterophyes heterophyes Phylum Nematoda Protozoa
Diagnostic features of adults in class Trematoda: Ø Organs of attachment (suckers) Ø Digestive tract Ø Reproductive organs (male & female organs)
Fasciola hepatica Prominent shoulders Cephalic cone Mouth Short pharynx & oesophagus Intestine Ventral sucker Intestinal caeca Single highly branched uterus Single highly branched ovary 2 highly branched Testes Oral sucker 3 cm
Fasciola gigantica Oral sucker uterus Ventral sucker 7 cm Intestinal caeca
Fasciola hepatica Fasciola gigantica
Section of Fasciola in liver Liver tissue Cut section in ovary or testis Adult Fasciola Cut section in one of intestinal branches
Diagnostic features of Fasciola egg: Ø Size: Large (170 x 90 µm) Ø Shape: Oval Ø Special character: Operculum Ø Colour: Yellow Ø Content: Immature
Lymnaea snail Sharp apex Large body whorl Short spire Aperture (opening) Right handed snail
Heterophyes heterophyes Oral sucker Ventral sucker Genital sucker 3 mm 2 large ovoid Testes Single uterus
Pirenella conica snail Apex Transverse whorl with coarse tubercles Long spire Right handed snail Siphonal notch
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