Days Set Up
Daily, 24 hrs
Analytic Time

Preliminary results are reported in 24 hours. Negative cultures are reported in 5 days. The health care provider will be notified of initial positive cultures and Gram stain result. Verigene Blood Culture Nucleic Acid Tests will be run on the first positive set of bottles in an episode of bacteremia. Results will typically be available 3-6 hours after the time of Gram Stain notification.

MiChart Code
Toxicology Screen, Blood
Soft Order Code

Test Updated:


Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

BacT/Alert Blood Culture System
Verigene® Gram-Positive Blood Culture Nucleic Acid Test (BC-GP)
Verigene® Gram-Negative Blood Culture Nucleic Acid Test (BC-GN)

Test Usage

Isolate and identify bacteria or yeast causing bacteremia or fungemia.

Reference Range

No growth

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements


Two blood culture sets from different anatomic sites should be submitted to detect suspected bacteremia or fungemia. Draw blood before initiating antibiotic therapy if possible. Invert BacT/Alert bottle to mix with blood and broth thoroughly. Do not refrigerate. For optimum recovery, send immediately or store BacT/Alert bottle at room temperature and send within 18-24 hrs. A maximum of 3 blood culture sets will be accepted within a 24 hr period. If an unacceptable specimen is received, the client will be notified before disposal of the original specimen. Collection: Clean venipuncture site with soap and water if soiled. Wipe with 70% alcohol and allow to dry. Place swab containing an iodoform solution on the venipuncture site and apply in overlapping circles peripherally to obtain a diameter of 4 inches. Allow to dry 2 minutes before performing venipuncture. Do not palpate venipuncture site after preparation. If the patient is sensitive to iodine, alcohol alone may be used. Draw required amount of blood into syringe and transfer to blood culture set. To inoculate bottles, remove protective top from bottle, swab with 70% alcohol and air dry before puncturing. Do not add air to bottles. Label each bottle individually with patient's name, registration number and anatomic site of blood draw. Please do not put label on bottom of bottles or across two bottles since this interferes with loading bottles on the instrument. Additional Instructions: 1. Fever of undetermined origin: obtain 2 separate blood cultures initially and 2 more 24-36 hrs later collected 1 hr before the expected temperature elevation. 2. Acute endocarditis: obtain three separate blood cultures during the first 1-2 hrs of evaluation and begin therapy. 3. Subacute endocarditis: obtain 3 blood cultures on day 1. If all are negative 24 hrs later, obtain 3 more. 4. Filamentous fungus (e.g., Histoplasma or Aspergillus sp.) suspected: send isolator tube for fungus blood culture (Blood Culture, Fungus). 5. Mycobacterium sp. suspected: send ia BacT/Alert MB bottle for an AFB blood culture (Blood Culture, AFB). 6. Quantitative culture for bacteria required: see Blood Culture, Quantitative.

Aerobic or Anaerobic Culture bottle
Normal Volume
10 mL into each bottle. DO NOT OVERFILL.
Minimum Volume
1 mL per year of age (pediatric patients)

Billing Information

CPT Code
Pro Fee Code

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.