Yeast Infection, BV or UTI? Symptoms, Causes and Which Test | South Africa
Tell them apart

Yeast Infection, BV or UTI? How to Tell

These three are easy to mix up. They can feel similar, they sometimes happen together, and the wrong treatment will not help. Here is a plain-English guide to what sets them apart, the organisms behind each, and how to find out for sure.

No doctor referral Walk in or test at home Names the exact cause
3 conditions
that feel alike but have different causes and different treatments, so naming the right one matters.
SN
Medically reviewed by Dr Samantha Naidoo MB ChB, FCP (SA) · Medical Director, Epicentre Walk-In Labs · Reviewed 9 June 2026
The short answer

The short answer

A yeast infection is an overgrowth of a fungus, usually Candida. Thick white discharge, itching as the main complaint, and little or no smell.

Bacterial vaginosis is an imbalance of bacteria, where protective Lactobacillus are outnumbered by Gardnerella and others. Thin greyish discharge, a fishy smell that gets worse after sex, and mild or no itching.

A urinary tract infection is bacteria in the bladder rather than the vagina. Burning when you pass urine, needing to go constantly, and lower abdominal pain. A UTI does not usually cause vaginal discharge at all.

All three need different treatment, which is why guessing costs time. Antifungal treatment does nothing for BV, antibacterial treatment does nothing for thrush, and treating a UTI will not touch either. Testing at Epicentre needs no doctor's referral, and both the vaginal panel and the UTI panel are self-collected with results in 5 to 7 working days.

Same area, very different problems

A yeast infection is a fungus, BV is a bacterial imbalance, and a UTI is an infection of the urinary tract. They share territory and some symptoms, but they are not the same thing, and what clears one does nothing for another.

The quick version: thick white discharge with a strong itch leans towards a yeast infection; a thin discharge with a fishy smell leans towards BV; burning when you pee and needing to go often leans towards a UTI. But these are only leanings. Because they overlap and can happen together, the only way to be sure is a test that names the exact organism.

Side by side

Yeast infection vs BV vs UTI at a glance

  Yeast infection BV UTI
What it isA fungal overgrowth (thrush)A bacterial imbalanceAn infection of the urinary tract
Main causeCandida yeast, usually C. albicansLoss of good bacteria, overgrowth of BV bacteriaBacteria or yeast entering the bladder
DischargeThick, white, like cottage cheeseThin, grey or white, more of itNot usually, but urine may look cloudy
SmellLittle or no smellFishy, often worse after sexUrine may smell strong
Itch or irritationStrong itch and burningMild irritation, sometimes noneNot usually itchy
Main giveawayItch plus thick white dischargeFishy smell plus thin dischargeBurning when you pee, needing to go often

Use this as a guide, not a diagnosis. Symptoms overlap, and you can have more than one at once.

Yeast infection

What causes a yeast infection, and what are the symptoms?

A yeast infection is an overgrowth of a fungus called Candida. Most cases are caused by Candida albicans, though other species such as Candida glabrata and Candida tropicalis can be involved, and these can be more stubborn to treat. A small amount of Candida is normal; the problem starts when it overgrows.

The classic signs are a thick, white, cottage-cheese-like discharge, with strong itching and burning, and usually little or no smell. Because the itch is so distinctive, thrush is the one people most often recognise, but other species can behave differently, which is why naming the species can matter when it keeps coming back.

Bacterial vaginosis

What causes BV, and what are the symptoms?

BV is not an infection caught from outside so much as a shift in the balance of bacteria that already live in the vagina. When the protective bacteria, the Lactobacillus species such as L. iners and L. jensenii, fall away, other bacteria take over. The main one is Gardnerella vaginalis, often joined by Atopobium vaginae and molecular markers like BVAB2.

The giveaway is a thin, greyish discharge with a fishy smell that often gets worse after sex. Itching is usually mild or absent, which is one way it differs from thrush. BV also tends to come back, partly because some of these bacteria are stubborn, which is where knowing the exact organisms helps.

Urinary tract infection

What causes a UTI, and what are the symptoms?

A UTI is an infection of the urinary tract, the system that makes and carries urine. The clue is in where the symptoms are: burning when you pee, needing to go often and urgently, and sometimes cloudy or strong-smelling urine, rather than the discharge and itch of the other two.

Most UTIs are bacterial, commonly from E. coli that travels from the gut, or organisms like Enterococcus faecalis. But here is the part many people miss: a UTI can also be caused by yeast. Candida species can infect the urinary tract too, and the symptoms feel identical to a bacterial UTI, so a fungal cause is easily missed by a test that only looks for bacteria.

Why it matters

Why does treating the wrong one make it worse?

Because all three can feel similar, it is genuinely easy to treat the wrong one. A yeast treatment does nothing for BV. Neither touches a UTI. And you can have two at once, so clearing one can leave you still unwell. Treating blind also feeds the cycle of infections that keep coming back.

A test that names the organism ends the guessing. PCR testing reads the DNA of what is actually there, so it can tell a fungus from a bacterial imbalance, and even pick up a fungal cause of a UTI that a basic test would miss. That is the difference between treating a label and treating what you actually have.

The right test

Which test should I get?

For vaginal symptoms

R1,609

Itch, discharge or odour points to the vaginal balance. The BV Microbiome Test measures your protective Lactobacillus against the BV-associated bacteria, so you see what has tipped.

  • 17 vaginal targets by PCR
  • Protective and BV-associated bacteria
See the BV test

For urinary symptoms

R1,609

Burning or needing to pee often points to the urinary tract. The UTI Package checks both bacterial and fungal causes, including 7 Candida species, in one test.

  • 11 organisms by PCR
  • Catches a fungal UTI a basic test misses
See the UTI test

Walk in or order a home kit

People come in certain they have one thing and it turns out to be another, or two at once. You cannot always tell these apart by feel, and a yeast treatment will not fix a bacterial problem. A test that names the organism saves a lot of trial and error.

Dr Samantha NaidooMedical Director, Epicentre Walk-In Labs

See a clinician in person if

Testing is useful, but get checked in person rather than testing alone if you have:

  • Fever, back or side pain, or blood in your urine, which can signal a kidney infection.
  • Symptoms in pregnancy, or that are severe or not settling.
  • Pelvic pain, or anything unusual that may need an examination.
Common questions

Yeast, BV and UTIs: quick answers

Yes to both. Men get UTIs less often than women because the urethra is longer, but a UTI in a man is more likely to signal something else going on and should always be looked at by a doctor. Thrush can also affect the penis, causing redness, itching and irritation under the foreskin, and it can be passed between partners. Epicentre's Penile Large Sexual Health panel at R1,925 covers Candida species alongside the sexually transmitted infections, and the UTI panel works from a urine sample regardless of anatomy.
A UTI is not passed on like a sexually transmitted infection. The bacteria usually come from your own bowel rather than from a partner. Sex can trigger one by moving bacteria towards the urethra, which is why UTIs often follow sex, but you are not catching it from someone. That said, some sexually transmitted infections cause burning on urination that feels exactly like a UTI, so a urine test that finds nothing is worth following up rather than ignoring.
Repeated episodes are a reason to test rather than to keep treating. Recurrent symptoms can mean the original diagnosis was wrong, that a different organism is involved, or that something is being reintroduced. Over-the-counter creams and urinary alkalinisers may ease symptoms without addressing the cause, and repeated antifungal use can select for Candida species that respond less well. A panel that names the organism gives a doctor something concrete to work from.
They overlap, so symptoms alone are not reliable, but as a rough guide: a thick white discharge with strong itching points to a yeast infection; a thin discharge with a fishy smell points to BV; and burning when you pee with needing to go often points to a UTI. Because they can feel similar and even happen together, a test that names the exact organism is the only way to be sure.
Yes. They are caused by different organisms, a bacterial imbalance for BV and a yeast overgrowth for thrush, and you can have both at once. Treating one will not clear the other, which is part of why guessing can leave symptoms lingering.
Because the three conditions need different treatment, and an over-the-counter product aimed at one will not help another. A yeast treatment does nothing for BV, and neither helps a UTI. If you treat the wrong thing, symptoms persist or come back. Testing first tells you what you are actually dealing with.
Yes. Although most UTIs are bacterial, Candida yeast can also cause urinary symptoms, and the two feel identical. A PCR urine panel checks for both bacterial and fungal causes in one test, so a fungal cause is not missed.
No doctor referral is needed. You can walk in at an Epicentre branch in Cape Town, Durban or Johannesburg and collect your sample privately, or order a discreet home kit anywhere in South Africa.
About 5 to 7 working days for the PCR panels. If you need answers sooner, you can pay for expedited results. For sudden, severe symptoms, see a clinician who can examine and treat you the same day.
For vaginal symptoms like itch, discharge or odour, the BV Microbiome Test looks at the vaginal balance. For urinary symptoms like burning or frequent peeing, the UTI Package checks both bacterial and fungal causes. If you are not sure, our team can help you choose, or a clinician can guide you.
Go deeper

Where can I get tested in South Africa?

You don't need a doctor's referral if you're paying cash. Epicentre is a walk-in laboratory with three branches, open Monday to Friday from 08:30 to 16:00.

  • Cape Town — 24 Lower Main Road, Observatory. 021 201 1658.
  • Johannesburg — 2 Seventh Avenue, Parktown North. 010 825 6318.
  • Durban — 2 Knelsby Avenue, Hillcrest. 031 880 2150.

Home kits post anywhere in South Africa in unbranded packaging with a pre-paid courier return, so you can collect the sample yourself without going anywhere. Results take 5 to 7 working days either way.

Guides to the organisms involved

Every organism named on this page has its own guide on our vaginal health microorganisms page, which explains what each one does, whether it is protective or harmful, and which panel looks for it.

Candida albicans
The yeast behind most thrush, and what it means when it keeps coming back.
Read the guide →
Gardnerella vaginalis
The bacterium at the centre of most bacterial vaginosis.
Read the guide →
E. coli and UTIs
The bacterium behind most urinary tract infections, and why they recur.
Read the guide →

Sources

Medically reviewed by Dr Samantha Naidoo, MB ChB, FCP (SA), Medical Director at Epicentre Walk-In Labs. Reviewed 9 June 2026. This article is general health information, not a medical diagnosis. Epicentre Aids Risk Management (Pty) Ltd provides diagnostic laboratory testing and does not provide diagnoses, treatment or prescriptions to the public; results are intended to inform discussions with a registered healthcare practitioner.

Stop guessing, find out which one it is

Whether it is a yeast infection, BV or a UTI, a PCR test names the exact cause so you can treat the right thing. Walk in at Observatory, Hillcrest or Parktown North, or order a discreet home kit.

BV Microbiome Test UTI Package WhatsApp us