TEST CATALOG ORDERING & RESULTS SPECIMEN HANDLING CUSTOMER SERVICE EDUCATION & INSIGHTS
Test Catalog

Test ID: SHIGC    
Shigella Culture, Feces

Useful For Suggests clinical disorders or settings where the test may be helpful

Determining whether Shigella species may be the cause of diarrhea

 

Reflexive testing for Shigella species from nucleic acid amplification test-positive stool

 

This test is generally not useful for patients hospitalized more than 3 days because the yield from specimens from these patients is very low, as is the likelihood of identifying a pathogen that has not been detected previously.

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When this test is ordered, the reflex tests may be performed and charged separately.

 

See Laboratory Testing for Infectious Causes of Diarrhea in Special Instructions.

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Diarrhea may be caused by a number of agents, including bacteria, viruses, parasites, and chemicals; these agents may result in similar symptoms. A thorough patient history covering symptoms, severity and duration of illness, age, travel history, food consumption, history of recent antibiotic use, and illnesses in the family or other contacts will help the healthcare provider determine the appropriate testing to be performed.

 

Shigella species are common causative agents of bacterial diarrheal disease worldwide. The infectious dose is low; Shigella transmission can occur via contaminated food and water or from direct person-to-person contact.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

No growth of pathogen

Interpretation Provides information to assist in interpretation of the test results

The growth of Shigella species identifies a potential cause of diarrhea.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

The yield of Shigella species is reduced when specimens are delayed in transit to the laboratory (>2 hours from collection for unpreserved specimens).

 

Check local public health requirements, which may require submission of isolates to a public health laboratory.

Clinical Reference Recommendations for in-depth reading of a clinical nature

1. Pillai DR: Fecal culture for Campylobacter and related organisms. In Clinical Microbiology Procedures Handbook, Fourth edition. Washington, DC, ASM Press, 2016, Section 3.8.2

2. DuPont HL: Persistent diarrhea: A clinical review. JAMA 2016;315(24):2712-2723 doi:10.1001/jama.2016.7833

3. DuPont HL, Levine MM, Hornick RB, Formal SB: Inoculum size in shigellosis and implications for expected mode of transmission. J Infect Dis 1989;159:1126

4. Maurelli AT, Lampel KA: Shigella. In Foodborne Disease Handbook. Edited by YH Hui, JR Gorham, KD Murrell, DO Cliver, Marcel Dekker, New York 1994, pp 321

5. CDC Health Alert Network. CDC Recommendations for diagnosing and managing Shigella Strains with possible reduced susceptibility to ciprofloxacin. April 18, 2017. Accessed March 23, 2019 Available at https://emergency.cdc.gov/han/han00401.asp

Special Instructions Library of PDFs including pertinent information and forms related to the test