Category
SEROLOGY/ IMMUNOLOGY
Sub Category
INFECTIOUS
Synonyms/Aliases
SALMONELLA TYPHI - O & H ANTIGEN, SALMONELLA PARATYPHI A - H ANTIGEN, SALMONELLA PARATYPHI B - H ANTIGEN.
Abbreviations
N/A
Type
PROFILE/ PANEL (BUNDLED TESTS).
4-5 Days
4-5 WORKING DAYS
Method
AGGLUTINATION.
Temp
AMBIENT (24 HOURS), REFRIGERATED (7 DAYS), FROZEN (30 DAYS).
Setup
ALL WORKING DAYS.
Components Parameters
"O" ANTIGEN, "H" ANTIGEN.
PRE-ANALYTIC CONSIDERATIONS
Test Ordering Instructions
FILL OUT TEST REQUEST FORM FULLY & LEGIBLY.
Patient preparation
N/A
Sample type
SERUM.
Container/ preservative
SERUM SEPARATOR TUBE (SST/ GEL) OR PLAIN (RED TOP) VACUTAINER.
Sample volume
2 ML
Rejection criteria
LABELING ISSUE (UNLABELED/ MISLABELED); MISSING REQUEST FORM; MISMATCH BETWEEN REQUEST FORM & SAMPLE DETAILS; MISSING AGE/ GENDER; WRONG SAMPLE TYPE; INSUFFICIENT SAMPLE; HEMOLYZED, LIPEMIC, ICTERIC SAMPLES.
Other Instructions
CENTRIFUGE SST (SERUM GEL TUBES) WITHIN 1-2 HOURS OF COLLECTION. CENTRIFUGE RED TOP VACUTAINERS AND ALIQUOT SERUM WITHIN 1-2 HOURS OF COLLECTION. THE SEPARATION VIAL MUST BE LABELED WITH AT LEAST 2 PATIENT IDENTIFIERS AND THE SAMPLE TYPE.
Reference intervals
NEGATIVE.
Clinical Utility
DETECTS THE PRESENCE OF SERUM AGGLUTININS (H AND O) IN PATIENTS SERUM WITH TYPHOID AND PARATYPHOID FEVER.
Test Limitations/ Confounders
CROSS-REACTIVITY WITH OTHER SALMONELLA SPECIES. INABILITY TO DISTINGUISH CURRENT VS. PREVIOUS INFECTION VS. VACCINATION AGAINST TYPHOID.