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Medical Laboratory Testing: A Patient's Guide to Understanding Your Test

Published: August 9, 2026Updated: August 16, 2026

This test identifies anaerobic bacteria from genital specimens to diagnose infections caused by bacteria that grow without oxygen.

Quick summary

{"The test detects anaerobic bacteria that thrive without oxygen","It helps diagnose infections in the genital area","Results guide antibiotic treatment choices","Sample is collected from the genital area using a swab","Results typically take 2-7 days"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
91865-6
Short code
ANGCUL
Synonyms
Bacteria Genital Anaerobe Cult
Category
chemistry
Sample
serum
Container
Anaerobic transport medium (e.g., Amies or Stuart transport medium with reducing agents), sterile screw-capped container, or swab in anaerobic transport system
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
anaerobic-culture
CPT
87075
SNOMED
428931000124102
Specimen volume
0.5-1 mL of fluid or tissue; swabs should be fully saturated with exudate
Stability
Maintain at room temperature (20-25°C) in anaerobic transport medium. Process within 2 hours of collection for optimal recovery. If delayed, refrigerate at 2-8°C for no more than 24 hours.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
48–168 hours
Order
routine

This is a laboratory test that measures specific substances in a sample of your blood, urine, or another body fluid. Your doctor uses the results to see how well your body is working and to help diagnose, screen for, or monitor a medical condition.

The Anaerobic Bacteria Culture Test is a laboratory test that detects and identifies anaerobic bacteria from a genital specimen. Anaerobic bacteria are microorganisms that can grow and multiply without oxygen. This test is important because many genital infections are caused by anaerobic bacteria that cannot be detected by standard culture methods.

Your doctor may order this test to find the cause of symptoms you are having, to check for a health problem before it causes symptoms, or to see how well a condition is responding to treatment. The results give important information that helps guide decisions about your care.

Your healthcare provider may order this test if you have symptoms of a genital infection that may be caused by anaerobic bacteria. Symptoms may include abnormal vaginal discharge, pelvic pain, genital sores, or signs of infection after surgery in the genital area. This test helps determine the exact cause of your infection so that appropriate treatment can be prescribed.

Depending on the test, a sample of blood is usually drawn from a vein in your arm with a small needle, or you may be asked to provide a urine, saliva, or stool sample. Some tests require fasting or other preparation, and your care team will give you clear instructions ahead of time.

A healthcare provider will collect a specimen from the affected area using a sterile swab. For women, this may include a vaginal or cervical swab. For men, it may include a swab from the urethra or from any lesions. The specimen is then placed in a special container that maintains anaerobic conditions and sent to the laboratory for testing.

Your results are compared with a reference range, which shows the levels typically seen in healthy people. Values outside this range may point to an infection, a chronic condition, or another issue that needs attention, but only your doctor can interpret them together with your medical history and physical exam.

If anaerobic bacteria are identified, the results will show the specific type of bacteria found. This information helps your healthcare provider choose the most effective antibiotic treatment. If no anaerobic bacteria are found, your infection may be caused by other organisms or non-infectious causes, and further testing may be needed.

These tests are very safe. If your blood is drawn, you may feel a quick sting from the needle, and some people develop a small bruise or feel briefly lightheaded. Serious problems such as infection or excessive bleeding are rare, and providing a urine or stool sample carries no risk at all.

The risks associated with this test are minimal and similar to routine swab tests. You may experience mild discomfort during specimen collection, and there is a small risk of minor bleeding or irritation. These risks are generally outweighed by the benefits of obtaining an accurate diagnosis.

Reference range

No anaerobic bacteria isolated; presence of normal vaginal/cervical flora reported as commensal organismsN/A

Specimen: serum

Patient should abstain from vaginal douching, sexual intercourse, and use of intravaginal medications for at least 48 hours prior to specimen collection. Discontinue topical antimicrobial therapy for a minimum of 72 hours before collection when clinically feasible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Anaerobic bacteria are a common cause of pelvic inflammatory disease (PID), bacterial vaginosis, vulvar abscesses, and post-surgical infections in the genital area. This test is clinically significant because anaerobic infections often require specific antibiotics different from those used for aerobic bacterial infections. Proper identification of the causative organism ensures targeted treatment, reduces complications, and helps prevent antibiotic resistance. Additionally, some anaerobic bacteria can produce toxins that cause severe tissue damage if left untreated, making early detection crucial.

Frequently asked questions

How long does it take to get results?
Results typically take 2-7 days because anaerobic bacteria grow slowly and require special culture conditions. The laboratory needs time to identify the specific type of bacteria and determine which antibiotics will be most effective.
Do I need to prepare for this test?
Avoid douching, using vaginal creams, or having sexual intercourse for 24-48 hours before the test, as these may affect the results. Inform your healthcare provider about any antibiotics you are currently taking, as they may need to be stopped before testing.
What happens if no bacteria are found?
If no anaerobic bacteria are identified, it could mean your infection is caused by aerobic bacteria, viruses, fungi, or non-infectious causes. Your healthcare provider may recommend additional tests or different treatment approaches based on your symptoms.
Will the test hurt?
You may feel some discomfort or a mild burning sensation during specimen collection, but the procedure is generally quick and well-tolerated. The discomfort typically subsides immediately after the sample is collected.
How is an anaerobic infection treated?
Anaerobic infections are typically treated with specific antibiotics such as metronidazole, clindamycin, or penicillins with beta-lactamase inhibitors. Your healthcare provider will choose the most appropriate antibiotic based on the specific bacteria identified and your overall health condition.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy