ARUP's Laboratory Test Directory

0093185: Salmonella typhi Antibodies

Test Mnemonic: WIDAL
Methodology: Direct Agglutination

Performed: Mon, Thu

Reported: 1-5 days

Specimen Required:  
Collect: One 5 mL SST.

Transport: 2 mL serum at 2-8°C. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 1 mL serum at 2-8°C. Submit specimen in an ARUP Standard Transport Tube.

Remarks: Remove serum from cells ASAP. Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" or "convalescent."

Unacceptable Conditions: Contaminated or heat-inactivated specimens.

Stability:
After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year

Reference Interval:
 
Test Number Components Reference Interval
 Salmonella O Paratyphoid A < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection
 Salmonella O Paratyphoid B < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection
 Salmonella O Group D < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection
 Salmonella H. Paratyphoid A < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection
 Salmonella H. Paratyphoid B < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection
 Salmonella H. Group D < 1:20 Negative
1:20-1:80 Equivocal
1:160 Strongly suggestive of infection

CPT Code(s):
86768 x6

 

 

 
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