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Updated: Jun 22, 2026

Establishment and Characterization of UTI and CAUTI in a Mouse Model
Published on: June 23, 2015
[Voice on the treatment of ureaplasmas infections]
Małgorzata Biernat-Sudolska1, Danuta Rojek-Zakrzewska, Artur Drzewiecki
1Zakład Wirusologii, Katedra Mikrobiologii CM UJ. msudolsk@cm-uj.krakow.pl
Abstract:
The aim of the study was to determine susceptibility of ureaplasmas for selected antimicrobials belonging to 3 groups, which are applied clinically. Study was conducted on 39 U. parvum and 26 U. urealyticum clinical isolates. Doxycyclin, azithromycin and levofloxacin were applied during the study. In case of azithromycin U. urealyticum strains were more susceptible; MIC90 = 1 microg/ml and MIC range for both species mean that only a few strains are resistant (only U. parvum). In case of doxycyclin U. parvum strains were more susceptible and MIC ranges mean that there are no resistant strains in both species. In case of levofloxacin wide MIC range with values signifying resistance was found. Doxycyclin is a good choice for empirical treatment of infections with ureaplasma aetiology. In case of macrolides higher dosage is indicated, because there is a risk of clinical failure at lower doses. Quinolones should not be used in empirical treatment of ureaplasma infections.
Insights
Ureaplasma susceptibility varies among antimicrobials. Doxycycline is effective for empirical treatment, while macrolides require higher doses and quinolones should be avoided for ureaplasma infections.
Area of Science:
- Microbiology
- Antimicrobial Resistance
Context:
- Ureaplasma species, including Ureaplasma parvum and Ureaplasma urealyticum, are common causes of genitourinary tract infections.
- Understanding antimicrobial susceptibility is crucial for effective treatment of these infections.
Purpose:
- To evaluate the in vitro susceptibility of Ureaplasma parvum and Ureaplasma urealyticum clinical isolates to doxycycline, azithromycin, and levofloxacin.
- To guide empirical treatment strategies for ureaplasma-related infections.
Summary:
- Ureaplasma parvum and Ureaplasma urealyticum isolates showed varying susceptibility to tested antimicrobials.
- Doxycycline demonstrated excellent activity against both species, with no observed resistance.
- Azithromycin showed higher susceptibility in Ureaplasma urealyticum, but some Ureaplasma parvum resistance was noted.
- Levofloxacin exhibited a wide range of minimum inhibitory concentrations (MICs), indicating significant resistance in some strains.
Impact:
- Doxycycline is recommended as a suitable agent for empirical treatment of ureaplasma infections.
- Higher dosages of azithromycin may be necessary to overcome potential resistance and prevent clinical failure.
- Levofloxacin is not recommended for empirical therapy due to observed resistance patterns.
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