The life cycle of liver-fluke and its economic importance

The life cycle of liver-fluke

What is liver fluke and The life cycle of 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.

THE LIFE CYCLE OF LIVER-FLUKE

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.

The REDIA of liverfluke

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

HERE IS A DIAGRAM OF THE LIFE CYCLE OF 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.

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38.
39. PROCESSES IN COCOA CULTIVATION
HOLING AND LINING
40. YAM
41. LAND PREPARATION FOR YAM
42. DEPT OF PLANTING
43. SPACING OF YAM
44. PLANTING DEPT OF YAM
45. STORAGE OF YAM
46. STAKING OF YAM
47. HARVESTING OF YAM
48. COWPEA
JUTE
49. FORAGE CROP AND PASTURE
50. FORAGE GRASSES
51. SILAGE
52. PASTURE
53. TYPES OF PASTURE
COMMON GRASSES AND LEGUMES
54. GRASSES
55. LEGUMES
56. ESTABLISHMENT OF PASTURES
57. 201. FORAGE PRESERVATION
58. HAY SILAGE
59. FORESTRY IMPORTANCE OF FORESTRY 206. FOREST MANAGEMENT FOREST REGULATION DEFORESTATION AFFORESTATION
60. DISEASES AND PESTS OF CROPS
61. MAIZE SMUT
62. RICE BLAST
63. MAIZE RUST
64. LEAF SPOT OF GROUNDNUT
65. COW-PEA MOSAIC
66. COCOA BLACK POD DISEASE

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1. BALANCED DIETS
   141. LACTATION DIETS
   142. MALNUTRITION
2. RINDER PESTS
   148. NEWCASTLE DISEASE
   149. BACTERIA DISEASES
   150. ANTHRAX
   151. BRUCELLOSIS
   152. TUBERCULOSIS
   153. FUNGAL DISEASES
3. PROTOZOAN DISEASES
   155. TRYPONOSOMIASIS

   159. TAPE WORM
   160. ROUND WORM OF PIGS
   161. LIVER FLUKE
   162. ECTO PARASITES
   163. TICK