Order Digenea: Family FASCIOLIDAE Flashcards
Characteristics of Family Fasciolidae
• Large leaf-like flukes
• Usually affects herbivores
• Spiny cuticle and distome
• absent receptaculum seminis
• ovary, testes and vitellaria are highly branched
• pharynx and short esophagus are present
• ceca may be branched or simple
• parasitic in the LIVER, BILE DUCTS, SMALL INTESTINE
Genera of Family Fasciolidae
✓ fasciola
✓ fascioloides
✓ fasciolopsis
commonly known as liver flukes
fasciola
Most important genus of the class Trematoda in domestic animals
Fasciola (liver flukes)
Anterior end forms a cone shaped projection with shoulders
Fasciola
causes a condition known fasciolosis or liver rot
Fasciola “liver flukes)
Fasciola “liver flukes”
• occurs either singly or mixed infections
• the incidence of fasciolosis is 4% in cows and 40% in carabaos
• eggs are OPERCULATE, SHELL IS YELLOWISH, FILLED WITH INDISTINCT CELLS, OPERCULUM NOT VERY DISTINCT
• found in the BILE DUCTS of SHEEP, GOAT, CATTLE, CARABAOS, and other animals like RABBITS, DOGS, CATS, PIGS, and man
more common than F. hepatica
F. gigantica
smaller than gigantica
Fasciola hepatica
Final host of Fasciola hepatica
Ruminants, pigs, hare, rabbit, horse, dogs, cats, man, elephant, kangaroo
Intermediate Host of Fasciola hepatica
Lymnaea truncatula and its varieties; in the Phil. Lymnaea auricularia rubigunosa and Lymnaea philippinensis or L. viridis
Predilection site of Fasciola hepatica
✓ adults in the bile duct
✓ immature flukes in the liver parenchyma
✓ aberrant flukes in other organs like LUNGS
Fasciola hepatica in Europe
Lymnaea truncatula
Fasciola hepatica in Australia, New Zealand
Lymnaea tomentosa, L. columella
Fasciola hepatica in South America
L. viator; L. cubensis
