What is Ureaplasma?
Ureaplasma is a tiny bacteria that lives in the genital and urinary tract areas of many healthy people, but can sometimes cause infections, particularly in the reproductive organs, urinary system, and in premature babies.
The Basics
Ureaplasma is actually a group of two related bacteria species:
- Ureaplasma urealyticum
- Ureaplasma parvum
These organisms are so small they don't have a cell wall like typical bacteria, which makes them unique and harder to detect with standard testing 1.
Where It Lives
Ureaplasma commonly lives in the genital tract of sexually active adults without causing any problems—it's found in many healthy people 2, 1. Think of it as a "sometimes troublemaker" rather than an always-dangerous germ. It spreads through sexual contact and can also pass from mother to baby during pregnancy or childbirth 3.
When It Causes Problems
While many people carry Ureaplasma without issues, it can cause infections under certain circumstances:
In Adults:
- Urinary tract infections: Can cause burning with urination and bladder irritation, though this is controversial since many healthy people carry it 4, 5
- Reproductive problems: May contribute to inflammation of the urethra (the tube you urinate through) in men and cervix in women 6
- Fertility issues: Some evidence suggests it can affect sperm quality and contribute to infertility problems in men 7, 6
In Pregnant Women and Babies:
- Premature birth: Can infect the amniotic fluid and trigger early labor 8
- Lung problems in premature babies: When premature infants get infected, it can contribute to chronic lung disease 8, 9
- Serious infections in newborns: Can rarely cause pneumonia, bloodstream infections, or brain infections in very small premature babies 8
Important Caveats
The biggest challenge with Ureaplasma is that doctors don't routinely test for it because so many healthy people carry it 2. Standard urine cultures won't detect it—special molecular tests (like PCR) are needed 4, 5.
Current medical guidelines actually recommend against testing for Ureaplasma in most situations because finding it doesn't necessarily mean it's causing your symptoms 2. This creates confusion when someone has symptoms but standard tests come back negative.
Treatment When Needed
When treatment is necessary, antibiotics like doxycycline or certain macrolides (like azithromycin) are typically used 7, 1. However, antibiotic resistance is becoming more common 1.
The key takeaway: Ureaplasma is a common bacteria that usually doesn't cause problems, but in specific situations—particularly in premature babies, people with unexplained urinary or reproductive symptoms, or fertility issues—it may be an "underestimated enemy" that requires special testing and treatment 7.