Crimea state medical university

INTRODUCTION
Classification of Trichinella Spiralis
Geographical distribution
Morphology
Life cycle
Phathogenecity
Symptoms
Diagonosis
Control

Classification of Trichinella spiralis

Geographical distribution
Geographical distribution
Trichinella is found on every continent except Antarctica. Most of the eight species have wide geographic and host distribution, a few of them are found only in specific areas and animals. Humans are susceptible to every species. The disease is less common in countries where pork is not eaten.

Morphology of Trichinella dpiralis

Morphology

Life cycle of Trichinella spiralis
To begin its lifecycle, T. spiralis adults invade the intestinal wall of a pig, and produce larvae that invade the pig's muscles. The larval forms are encapsulated as a small cystic structure within a muscle cell of the infected host.

Life cycle

Life cycle

Phathogenecity
Life Cycle & Pathology of Trichinella spiralis. < Infection occurs by ingesting encysted larvae in undercooked meat. < The larvae excyst and develop to adults in the small intestine. < Adults attach to the intestinal mucosa and being to release larvae in one week.

Phathogenecity

Diagnosis
Trichinella infections are most often diagnosed in the laboratory based on detection of antibodies to excretory/secretory Trichinella antigen by ELISA or IFA. Testing is rarely positive in early disease. IgG antibodies can be detected approximately 12 to 60 days postinfection.

Diagnosis

Clinical feature s

Treatment of trichilla spiralis

Contol and prevention
Infection by Trichinella spiralis is obtained by eating undercooked meat infected with larvae. Thus, cooking the meat (especially pork and bear meat) well to kill the infective larve will prevent one from acquiring an infection.