Related Experiment Video
Updated: Jun 16, 2025
A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
[Clinical characteristics of Ureaplasma urealyticum infection and colonization in extremely preterm infants]
Yan-Qiong Wang1, Ya-Li Zeng1, Xue-Yu Chen1
1Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical Unversity, Shenzhen, Guangdong 518000, China.
Insights
Ureaplasma urealyticum (UU) infection, not colonization, significantly increases bronchopulmonary dysplasia (BPD) risk in extremely preterm infants. UU infection also prolongs oxygen therapy and hospital stays, highlighting the importance of distinguishing between infection and colonization.
Area of Science:
- Neonatal Medicine
- Infectious Diseases
- Respiratory Medicine
Context:
- Extremely preterm infants are highly susceptible to infections.
- Ureaplasma urealyticum (UU) is a common pathogen in neonatal intensive care units.
- The distinction between UU infection and colonization is crucial for understanding clinical outcomes.
Purpose:
- To investigate the clinical characteristics of Ureaplasma urealyticum (UU) infection and colonization in extremely preterm infants.
- To determine the impact of UU infection and colonization on the incidence of bronchopulmonary dysplasia (BPD).
Summary:
- A retrospective study analyzed 258 extremely preterm infants, categorizing them into UU-negative, UU infection, and UU colonization groups.
- Infants with UU infection showed significantly higher rates of BPD, longer oxygen supply duration, and extended hospital stays compared to the UU-negative group.
- No significant difference in BPD incidence was observed between the UU colonization group and the UU-negative group.
Impact:
- UU infection, unlike colonization, is a significant risk factor for BPD in extremely preterm infants.
- Clinical management strategies may need to differentiate between UU infection and colonization to optimize BPD prevention and treatment.
- Findings underscore the pathogenic role of UU infection in neonatal respiratory morbidity.
Objectives:
To investigate the clinical characteristics of Ureaplasma urealyticum (UU) infection and colonization in extremely preterm infants and its impact on the incidence of bronchopulmonary dysplasia (BPD).
Methods:
A retrospective analysis was conducted on 258 extremely preterm infants who were admitted to the Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, from September 2018 to September 2022. According to the results of UU nucleic acid testing and the evaluation criteria for UU infection and colonization, the subjects were divided into three groups: UU-negative group (155 infants), UU infection group (70 infants), and UU colonization group (33 infants). The three groups were compared in terms of general information and primary and secondary clinical outcomes.
Results:
Compared with the UU-negative group, the UU infection group had significant increases in the incidence rate of BPD, total oxygen supply time, and the length of hospital stay (P<0.05), while there were no significant differences in the incidence rates of BPD and moderate/severe BPD between the UU colonization group and the UU-negative group (P>0.05).
Conclusions:
The impact of UU on the incidence of BPD in extremely preterm infants is associated with the pathogenic state of UU (i.e., infection or colonization), and there are significant increases in the incidence rate of BPD, total oxygen supply time, and the length of hospital stay in extremely preterm infants with UU infection. UU colonization is not associated with the incidence of BPD and moderate/severe BPD in extremely preterm infants.
Related Concept Videos
01:26Sexually Transmitted Infections
01:22Development of Immunocompetence
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...