The life cycle of liver-fluke and its economic importance

The life cycle of liver-fluke

What is liver fluke

The liver-fluke is a flattened leaf-like endo-parasite. It is brown in colour and about 2cm long. The liver-fluke is an Endo-parasite of farm animals like cattle, sheep and goat.
The primary host of the liver-fluke are farm animals while the Snail (Limnaea truncatula) is the secondary host.


Fertilized eggs of liver flukes are passed out together with faeces. During favourable conditions, the eggs hatch into ciliated larvae called miracidia. Each miracidium swims in water and is attracted to water snail which is the secondary host. It enters the body of the snail during which it loses its cilia and changes to a SPOROCYST and produces asexually to give rise to new larvae called REDIAE.


comes out of the SPOROCYST and goes to the digestive gland where it develops into a minute worm called CERCARIAE. The cercaria leaves the body of the snail and swim about in water until it finds a suitable host when animals come to drink dirty waters.
At times, the larvae may leave the host snail and encyst on vegetation. From there, they are ingested by grassing animals. The CERCARIAE penetrates the skin and tissues to enter the blood stream, and then to the liver tissue and finally to the bile duct where they firmly and finally settle down and develop into adult LIVER FLUKE

What are the economic importance of LIVER FLUKE?

The economic importance of liver fluke are as follows
1. Liver fluke causes a disease called BILHARZIA OR SCHISTOSOMIASIS.
2. Liver fluke affects the digestion of food of animals
3. The excretory products of liver fluke have a poisoning effect on the sheep
4. The liver fluke also results in liver rot, leading to drowsiness and death

How to control liver the spread of liver fluke

Liver fluke can be control in the following ways
1. Drain pasture properly since wet pasture can harbouir snail
2. Introduce ducks and geese to eat up the snails
3. Use lime on pasture because the eggs of liver fluke do not hatch in water containing high level of alkaline.

Please share if you find our article good and useful

Important topics related to the above article

1. Recognizing living things
2. Biology as an enquiry in science
3. Branches of biology
4. Processes of methods of science
5. Usefulness of science
6. Living and non-living things
7. Characteristics of living things
8. Differences between plants and animals
9. Organization of life
10. Complexity of organization in higher organisms
11. Kingdom monera
12. Kingdom Protista
13. Kingdom fungi
14. Kingdom Plantae
15. Kingdom Animalia
16. Cell as a living unit of an organism
17. Form in which living cells exist
18. Structures of plants and animal cells and functions of their components
19. Similarity and differences between plant and animal cell
20. Diffusion
21. Osmosis
22. Plasmolysis
23. Haemolysis
24. Turgidity
25. Faccidity
26. Nutrition
27. Feeding
28. Cellular respiration
29. Excretion
30. Growth
31. Cell reaction to its environment
types vertebrae and the vertebral column
32. Movement and responses
33. Reproduction
34. Skeleton

35. Type of skeleton
36. Bones of axial and appendicular skeleton
37. Joint
38. Functions of skeleton in man
39. Supporting tissues in plants
40. Mechanisms of supports in plants
41. Uses of fibres to plants
42. Functions of supporting tissues in plants
43. test for Food substances
44. Balanced diet and kwashiokor
food tests
45. Modes of nutrition
46. Feeding mechanisms in holozoic organisms
maintenance of teeth gum
47. Mammalian teeth
48. Dentition
49. Digestive enzymes
50. Meaning of ecology
causes of germs and diseases in humans
51. Local biotic communities or biomes in Nigeria
52. Major biomes of the world
53. Population studies
54. Ecological factors



ADVANTAGES OF MECHANIZED AGRICULTURE Farm mechanization has the following advantages 1. TIMELINESS OF OPERATION farm mechanization ensure...

popular post of all time