Sorted By Test Name - Mayo Medical Laboratories

CRYPS
80335
SFC
8719
FCUI
57104
FCUP
Cryptosporidium Antigen, Feces
Clinical Information: Cryptosporidia are protozoa of the coccidian group which are common
parasites of livestock animals and can contaminate and survive in surface water supplies. Infection of
humans occurs by the fecal-oral route or by ingestion of contaminated water. The exact mechanism by
which the organism causes gastroenteritis is unknown. Cryptosporidiosis occurs as a profuse diarrhea in
patients with AIDS and as a self-limited moderate diarrhea in young children, especially daycare
attendees and their relatives.
Useful For: Establishing the diagnosis of intestinal cryptosporidiosis
Interpretation: A positive enzyme-linked immunosorbent assay (ELISA) indicates the presence of
antigens of cryptosporidium and is interpreted as evidence of infection with that organism. The
sensitivity, specificity, and positive predictive value of the ELISA were 87%, 99%, and 98% respectively,
as determined by examination of 231 fecal specimens by conventional microscopy and by ELISA.
Reference Values:
Negative
Clinical References: Soave R, Johnson WD Jr: Cryptosporidium and Isospora belli. J Infect Dis
1988;157:225-229
Crystal Identification, Synovial Fluid
Clinical Information: Birefringent crystals are found in the synovial fluid of >90% of patients with
acutely inflamed joints. Monosodium urate crystals are seen in gouty fluids and calcium pyrophosphate
crystals are seen in chondrocalcinosis. The urates are usually needle-shaped, and the calcium crystals are
often rhomboidal. Cholesterol crystals may also be observed.
Useful For: Providing a definitive diagnosis for joint disease
Interpretation: Positive identification of crystals provides a definitive diagnosis for joint disease
Reference Values:
None seen
If present, crystals are identified.
Clinical References: Kjeldsberg C, Knight J: Body fluids: Laboratory examination of cerebrospinal,
seminal, serous & synovial fluids. 3rd edition. Chicago, American Society of Clinical Pathologists, 1993
pp 272-283, 292-293
CU (Chronic Urticaria) Index
Reference Values:
Reference Range: or=10
have basophil reactive factors in their serum which supports an autoimmune basis for disease.
Test Performed By: Viracor-IBT Laboratories
1001 NW Technology Dr.
Lee's Summit, MO 64086
CU (Chronic Urticaria) Index Panel
57106
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