Test 5 Tissue Nematodes Flashcards
(26 cards)
What is the common name of Trichinella Spiralis?
Trichina Worm
What is the infective stage of Trichinella Spiralis (Trichina Worm)?
Ingestion of undercooked meat
Pig, wild game
What is the Diagnostic Stage of Trichinella Spiralis (Trichina Worm)?
Encysted larva in striated muscle
Where are the adult forms of Trichinella Spiralis (Trichina Worm) found?
Small Intestine
Pathogenesis of adult Trichinella Spiralis (Trichina Worm) in the intestine will cause what symptoms?
Mild to Severe Diarrhea
Pathogenesis of Trichinella Spiralis (Trichina Worm) Larval Migration will cause what?
- High Eosinophilia
- Allergic and Toxic reactions
- May be fatal
The Larval encystment of Trichinella Spiralis (Trichina Worm) is seen where?
Primarily in striated muscle
Larval encystment of Trichinella Spiralis may cause what symptoms?
- Rheumatoid Pain
- Toxic Reaction
- May be fatal
How many larvae per gram of body weight may be fatal and occurs in what time frame, from a Trichinella Spiralis (Trichina Worm) infection?
5 larvae per gram
-Fatalities often occur within 4-8 weeks
What is the typical cause of fatalities when infected with Trichina Worm (Trichinella Spiralis)?
- Toxemia
- Pneumonitis
- Myocardial Failure
- Trichinous Encephalitis
What parasitic infection pathology consist of local villous atrophy w/Mucosal and submucosal infiltration w/neutrophils, eosinophils, and macrophages, and edema and basophilic degeneration present in skeletal muscle?
Trichinella Spiralis
The infective third stage larvae of Trichinella Spiralis (Trichina Worm) will encyst where?
Striated Muscle (Non-striated muscle and other tissue do not support development to third stage larvae)
Third Stage Larvae of Trichinella Spiralis (Trichina Worm) will cause local inflammation and tissue damage with what serious pathologic consequences?
Myocarditis
Encephalitis
Meningitis
(Fatal in high infection burden from myocarditis, encephalitis, pneumonia)
(Muscle pain and weakness in chronic cases)
During the Enteral Phase of Trichinella Spiralis (Trichina Worm) infection what symptoms are seen?
Watery Diarrhea
Vomiting
Abdominal Discomfort
Nausea
During the Systemic Phase in which there is larvae dissemination of Trichina Worm (Trichinella Spiralis) infection, what symptoms are seen?
Facial and Periorbital Edema Fever Weakness Malaise Myalgia Urticarial Rash Conjunctivitis Conjunctival and Subungual hemorrhages
What should be considered in patients presenting w/myositis, eosinophilia, fever, elevated creatine phosphokinase and lactate dehydrogenase?
Trichinosis
keep sample of meat frozen
What is the specimen of choice for Lab Id of Trichinella Spiralis (Trichina Worm) and what other tests may be performed?
Specimen: Muscle Biopsy
Other Tests:
-Skin Test: Backman
-Blood: ESR, eosinophil count
How is the Larvae of Trichina Worm (Trichinella Spiralis) Id’ed in the Lab?
Shape: Coiled
Color: Colorless
In Striated Muscle: Surrounded by Longitudinal Capsule
How is the adult form of Trichina Worm (Trichinella Spiralis) Identified in the Lab?
Size: Female bigger than male
Shape: Slender, Tapers to larger posterior end
Color: Colorless
Male: Two Caudal appendages
How can Trichinella Spiralis infection be prevented? What will not kill Trichinella Spiralis?
- Compliance w/food safety reg, rodent control, proper cooking
- Drying, Smoking, Salting will not kill Trichinella Spiralis
What is the Geographical Distribution of Trichinella Spiralis (Trichina Worm)?
Worldwide
More prevalent in pork eating countries (U.S., Europe)
What is the common name for Dracunculus Medinensis?
Guinea Worm
In the Pathogenesis of the Guinea Worm (Dracunculus Medinensis) severe allergenic reactions are seen when and what usually occurs on lower extremities?
Female Migration: Causing–>
Toxemia as female reaches surface of body
-GI upset
-Blisters on lower extremities
The blisters caused by Dracunculus Medinensis (Guinea Worm) have what kind of symptoms? How are these symptoms relieved?
Severe burning and itching (pruritus)
Relieved when blister ruptures
