Trichinella spiralis
Description
Trichinella spiralis is a type of Roundworm.
Prevalence
The worldwide incidence of Trichinella spiralis infection is estimated to be be 4% to 20%.
Characteristics of Trichinella spiralis
Trichinella spiralis is a small Roundworm measuring from 1.5 mm to 3.5 mm in length and 0.04 mm to 0.06 mm in diameter. The larva has a spear-like burrowing tip.
The same animal acts as the final and intermediate host, harboring the adult parasite temporarily and the larva for a longer period.
In order for the parasite to complete its life cycle, flesh containing the encysted larvae must be ingested by another host.
The larval parasite is found primarily in humans, pigs, hogs, rats, bears, foxes, walruses, dogs, and cats. For humans, pigs are usually the main danger.
Transmission of Trichinella spiralis
When Trichinella spiralis larvae are ingested by humans (from Pork), the pass to the upper Small Intestine where the larvae are released in a few hours.
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