fasciola hepatica sheep liver fluke n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Fasciola hepatica sheep liver fluke PowerPoint Presentation
Download Presentation
Fasciola hepatica sheep liver fluke

Loading in 2 Seconds...

play fullscreen
1 / 26

Fasciola hepatica sheep liver fluke - PowerPoint PPT Presentation


  • 794 Views
  • Uploaded on

Fasciola hepatica sheep liver fluke. liver fluke. Fasciola hepatica. Common name: The sheep liver fluke Habitat: Bile duct of liver. Route of infection: Man eat aquatic plants with encysted metacercariae.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Fasciola hepatica sheep liver fluke' - shaman


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
fasciola hepatica
Fasciola hepatica
  • Common name: The sheep liver fluke
  • Habitat: Bile duct of liver.
  • Route of infection: Man eat aquatic plants with encysted metacercariae.
  • Definitive host: Usual host sheep, infects liver of various mammals, including humans.
  • Intermediate host: Fresh water snails.
  • Infective stage: Encysted metacercariae on vegetations.
  • Diagnostic stage: Eggs in stool specimen.
  • Disease: Fascioliasis.
fasciola hepatica adult
Fasciola hepatica adult

Morphological characteristics

  • 2-3 cm.
  • Has conical projection
  • Oral and ventral sucker.
  • Pharynx.
  • Branched caecum.
  • Coiled uterus
  • Genital formula : O ( ovary)

T ( Testis)

T ( Testis)

fasciola hepatica eggs
Fasciola hepatica Eggs
  • Unembyonated.
  • Thin egg shell.
  • operculated.
  • 130-150 X 63-90 um.
  • Diagnostic stage
life cycle
Life cycle
  • The parasite browses on liver tissue for a period of up to 5-6 weeks and eventually finds its way to the bile duct where it matures into an adult and begins to produce eggs.
  • Up to 25,000 eggs per day per fluke can be produced, and in a light infection, up to 500,000 eggs per day can be deposited onto pasture by a single sheep.
pathology and clinical symptoms
Pathology and clinical symptoms.
  • Most of the damage results from worms are migrating through the liver parenchyma feeding on liver cells and blood
  • Worms in the bile ducts cause inflammation and edem
  • The triad of fever, hepatomegaly, and eosinophilia.
  • Symptoms and signs are associated with biliary obstruction
  • Acute epigastric pain, and jaundice are common.
diagnosis
diagnosis

Laboratory diagnosis:

finding large operculated eggs in the feces.

slide10

Intestinal fluke

Fasciolopsisbuski

fasciolopsis buski
Fasciolopsis buski
  • Common name: The large intestinal fluke
  • Habitat: Lumen of small intestine.
  • Route of infection: Man eat uncooked plants with encysted metacercariae.
  • Definitive host: Mainly human, other hosts; pigs and dogs.
  • Intermediate host: Fresh water snails.
  • Infective stage: Encysted metacercariae on vegetations.
  • Diagnostic stage: Eggs in stool specimen.
  • Disease: Fasciolopiasis.
fasciolopsis buski adult
Fasciolopsis buski adult

Morphological characteristics

  • 2-7x 0.5-2 cm.
  • Oral and ventral sucker.
  • Esophagus .
  • Unbranched caecum.
  • Coiled uterus.
  • Branched ovary.
  • Branched Testes.
  • Genital formula : O ( ovary)

T ( Testis)

T ( Testis)

fasciolopsis buski eggs
Fasciolopsis buski Eggs
  • Unembyonated.
  • Thin egg shell.
  • Inconspicuous. operculum.
  • 130-150 X 63-90 um
clinical features
Clinical features
  • Most infections are light and asymptomatic. In heavier infections, symptoms include diarrhea, abdominal pain, fever, ascites, and intestinal obstruction.

Laboratory diagnosis:

operculated eggs and some times the adults are found in the feces.

slide17

Lung Fluke

Paragonimuswestermani

paragonimus westermani
Paragonimuswestermani
  • Common name: The Lung Fluke.
  • Habitat: Encapsulated in Lungs.
  • Definitive host: Human, also other mammals.
  • First intermediate host: Water snail.
  • Second intermediate host: Crustaceans,Crabs.
  • Infective stage: Encysted metacercariae.
  • Diagnostic stage: Eggs in sputum or feces.
  • Disease: Paragonimiasis.
morphology
morphology
  • 7 – 12 x 4 – 6 mm.
  • Oral & Ventral Suckers
  • Unbranched caecum.
  • Pharynx.
  • Coiled Uterus ( black color)
  • Genital formula: O

T T

paragonimus westermani eggs
Paragonimus westermani Eggs
  • 80-120 x 50-60 um
  • Large, thick, dark shell.
  • Prominent operculum at the broad end.
  • Thick posterior end.
  • Unembryonated.
slide22

Life Stages

Egg  Miracidio

RediaI Redia II

Cercarias Metacercarias

slide24

Pathology:

Adults in lungs stimulate inflammatory response resulting in granulomas. Movement of worms to heart or brain causes death.

  • Symptoms:
    • Chronic cough , difficulties breathing , sputum with blood.
    • When moves to brain, can cause blindness, paralysis , disequilibrium , epilepsy.
slide25

DIAGNOSIS

  • based on detection of characteristic eggs in sputum, or stool,
  • serology helpful; standard test is complement fixation (CF) – has advantage to detect rapid decline in antibody levels