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Bacteriasmnqlmicro

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

This test checks for the presence of bacteria in a semen sample using a microscope to help diagnose infections of the male reproductive system.

Quick summary

{"The test examines semen under a microscope to detect bacteria","It helps diagnose infections that may affect fertility","A positive result may indicate an infection requiring treatment","The sample is collected through masturbation into a sterile container","Results help doctors determine if antibiotics or other treatments are needed"}

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

Key facts at a glance

LOINC
14124-2
Short code
SEMBACT
Synonyms
Bacteria Smn Ql Micro
Category
chemistry
Sample
serum
Container
Sterile, wide-mouthed, screw-capped plastic container
Units
N/A
Fasting
false
Population
adult
Sex
male
Age range
≥ 18 years
Method
microscopy-light
CPT
89320
SNOMED
395124003
Specimen volume
Entire ejaculate (typically 1.5-5 mL)
Stability
Ambient: 1 hour; Refrigerated (2-8°C): 2 hours. Specimen should be examined within 1 hour of collection for optimal motility assessment. Do not refrigerate if motility evaluation is required.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
1–4 hours
Order
routine

What is this test?

The Bacteria in Semen test is a laboratory examination that uses light microscopy to detect the presence of bacteria in a semen sample. This test is part of a semen analysis (sperm count test) and helps healthcare providers identify infections in the male reproductive tract, including the prostate, seminal vesicles, or urethra.

How is the sample collected?

You will need to collect a semen sample, usually through masturbation, into a sterile container provided by the laboratory. It's important to avoid using lubricants, condoms, or spermicides as they may contaminate the sample. You should abstain from sexual activity for 2-5 days before collecting the sample to ensure accurate results. The sample should be delivered to the laboratory within one hour of collection.

What happens in the laboratory?

In the lab, a technician places a small drop of your semen sample onto a glass slide and examines it under a microscope. They look for white blood cells (which fight infection) and bacteria. The presence of white blood cells may indicate inflammation or infection, even if bacteria are not immediately visible. Additional tests may be performed to identify the specific type of bacteria present.

How to prepare for the test?

Before the test, avoid sexual activity for 2-5 days. Do not use any lubricants, oils, or creams during sample collection. Inform your doctor about any current medications or recent illnesses. If you have a fever or active infection, let your healthcare provider know as this may affect the results.

Reference range

No bacteria observed; presence of bacteria may indicate infection or contaminationN/A

Specimen: serum

Patient should abstain from ejaculation for 2-7 days prior to specimen collection. Hands and penis should be washed thoroughly before sample collection. A sterile, wide-mouthed container must be used.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings2

Frequently asked questions

Does a positive result mean I have a sexually transmitted infection?
Not necessarily. While some bacteria may be transmitted sexually, other types of bacteria can enter the urinary tract naturally. Your doctor will determine the type of bacteria found and advise on appropriate treatment and whether partner testing is needed.
Will this test affect my ability to have children?
If bacteria are found and treated appropriately, the infection can be cleared. However, untreated infections may temporarily affect sperm quality. Following treatment, most men can conceive normally.
Is the test painful?
The test itself is not painful. The only discomfort may come from the sample collection process, which is similar to a regular semen analysis collection.
How long does it take to get results?
Results are typically available within 1-2 days, though this may vary depending on the laboratory. Your doctor will discuss the results with you during a follow-up appointment.
  1. 1
    MedlinePlus - Semen AnalysisSource
  2. 2
    Mayo Clinic - Male InfertilitySource
  3. 3
    American Urological Association - ProstatitisSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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