1. Trichineloza

3. Trichinella larvae in a sample of infected meat (light microscopy, Г—100).

4. Periorbital and eyelid edema associated with acute trichinosis
Periorbital and eyelid edema associated with acute trichinosis. Humans acquire the disease by ingestion of raw or insufficiently cooked meat (pork, bear, and walrus are the most common) that contains encysted larvae of Trichinella spiralis. Heavy infestation may result in an illness with fever, myalgias, eyelid edema, splinter hemorrhages, and eosinophilia. Diagnosis is by serologic studies or muscle biopsy.

5. Subconjunctival hemorrhages in a patient with trichinosis
Subconjunctival hemorrhages in a patient with trichinosis. This patient acquired trichinosis from eating “hamburger, ” but investigation revealed that some pork had been added to the ground beef.

6. This patient with trichinosis had periorbital swelling, muscle pain, diarrhea, and 28% (0.28) eosinophils.

7. Striking edema of the face of a 22-year-old woman with trichinosis
Striking edema of the face of a 22-year-old woman with trichinosis. A history of ingestion of poorly cooked "hogs head" was obtained. Periorbital edema and conjunctivitis are commonly seen in patients with trichinosis.

8. Striking edema of the feet of the same patient.

9. Here the parasitic disease Trichinosis is manifested by splinter hemorrhages under the finger nails. Trichinosis, or trichinellosis, is caused by eating raw or undercooked pork infected with the larvae of a species of worm called Trichinella. Initial symptoms include nausea, diarrhea, vomiting, fatigue, fever, and abdominal discomfort.

10. Trichinella spiralis organisms on cross section of muscle biopsy of the patient.

11. Histologic section shows encysted larvae of T. spiralis
in skeletal muscle.

12. Larvae of Trichinella spiralis in skeletal muscle biopsy.

13. Larvae of Trichinella spiralis in skeletal muscle biopsy
Larvae of Trichinella spiralis in skeletal muscle biopsy. This disease is acquired by eating undercooked meat, usually pork, containing encysted Trichinella larvae.

14. Encysted larvae of Trichinella in pressed muscle tissue sample
Encysted larvae of Trichinella in pressed muscle tissue sample.  The coiled larvae can be seen inside the cysts.

15. Larvae of Trichinella, freed from their cysts, typically coiled; length: 0.8 to 1 mm.  Alaskan bear.