Upload
jatheesh-mohan
View
953
Download
1
Tags:
Embed Size (px)
DESCRIPTION
parasitology trichinellosis trichinella cyst
Citation preview
TRICHINELLA SPIRALIS
Ooh…PIG
Taenia soliumSarcocystis suihominis
Ooh…PIGTaenia solium
Sarcocystis suihominis
Trichinella spiralis
Trichinella spiralis
• Common name: Trichina worm
• Tissue nematode
• Cause: Trichinosis
Trichinella spiralis
• Trichos – ella – spiralis
• Europe & America ; much less in tropics & Oriental countries
• In India- 1996-punjab
Trichinella spiralis- Habitat
• Mucosa of small intestine of pig, rat, bear , & man
• Striated muscles- Encysted larvae
• No free-living forms
Trichinella spiralis- Morphology
Claspers(Clasping papillae )
Female
Male Larvae
Trichinella spiralis-Morphology
• Thin & pointed anterior half of body?
• Pair of Claspers at posterior end?
• Viviparous?
• Life span?
Trichinella spiralis- Larvae
Trichinella spiralis-Trichinella cyst
Trichinella spiralis-Trichinella cyst
Trichinella spiralis- cyst & larvae
Trichinella spiralis-Trichinella cyst
• Shape?• Formed by?• Why preferentially in
diaphragm,biceps,muscles of jaw,extraocular muscles,neck & lower back?
• Position? Importance?• Fate?
Trichinella spiralis-Life cycle
Trichinella spiralis-Life cycle
Trichinella spiralis-Life cycle
• How many host?• Man?• Infective form?• Mode of infection?• Nurse cell?
Trichinella spiralis-Pathogenesis
• First stage
Trichinella spiralis-Clinical features
• First stage
Trichinella spiralis-Pathogenesis
• Second stage
Trichinella spiralis-Clinical features
• Second stage
Trichinella spiralis-Clinical features
Trichinella spiralis-Pathogenesis
• Final stage
Trichinella spiralis-Clinical features
• Final stage
Trichinella spiralis-Diagnosis
DIRECT INDIRECT
Trichinella spiralis-DiagnosisDIRECT METHODS
Trichinella spiralis-DiagnosisINDIRECT METHODS
• HISTORY• Eating pork 2 weeks earlier• Recent –gasteroenteritis
• BLOOD EXAMINATION• Eosinophilia (20-95%)
Serology
Trichinella spiralis-DiagnosisINDIRECT METHODS
• SEROLOGY• Hypergammaglobinemia-IgE• ELISA-Confirmatory test: TSL-1 secreting
antigens
• Bentonite flocculation test• Latex fixation test
Trichinella spiralis-DiagnosisINDIRECT METHODS
• Bachman intradermal test• 1:5000 or 1:10000 dilution of larval antigen• Wheel-15 to 20 minutes
Trichinella spiralis-DiagnosisINDIRECT METHODS
• Radiological examination-calcified cysts• Molecular methods- PCR
Trichinella spiralis-Treatment
• Mild cases: supportive treatment
Trichinella spiralis-Treatment
• Moderate cases• Albendazole-BID• 8daysOr momendazole
Trichinella spiralis-Treatment
• Severe cases• Add Glucocorticoids-Prednisolone
Trichinella spiralis-Prophylaxis
COOK
kill
Trichinella spiralis-Prophylaxis
No..!
TRICHINELLA SPIRALIS- KEY POINTS
• Smallest nematode• Host- optimum & alternative• Viviparous• Infective form• Muscles commoly involved• Pathogenesis & clinical features• Diagnosis & treatment
Thank you