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Published on: February 23, 2014
Colonization of paediatric lower respiratory tract with genital Mycoplasma species
Katir K Patel1, Paul S Salva, Wilmore C Webley
1Department of Microbiology, University of Massachusetts, Amherst Department of Pediatric Pulmonology, Baystate Medical Center, Springfield, Massachusetts, USA.
Insights
Urogenital Mycoplasma species, besides Mycoplasma pneumoniae, can colonize the airways of children with chronic respiratory diseases. However, this study found no link between Mycoplasma colonization and asthma in pediatric patients.
Area of Science:
- Medical Microbiology
- Pediatric Pulmonology
- Infectious Diseases
Background:
- Pathogen colonization of the neonatal or pediatric airway is increasingly linked to chronic respiratory diseases.
- Investigating the role of Mycoplasma species in pediatric chronic respiratory conditions is crucial.
Purpose of the Study:
- To determine the prevalence of Mycoplasma organisms in the bronchoalveolar lavage (BAL) fluid of pediatric patients with chronic respiratory diseases.
- To assess the association between specific Mycoplasma species and chronic respiratory conditions in children.
Main Methods:
- Analysis of 319 pediatric BAL samples using species-specific PCR.
- Detection of DNA from Mycoplasma genitalium, Mycoplasma hominis, Ureaplasma urealyticum, Ureaplasma parvum, and Mycoplasma pneumoniae.
Main Results:
- Mycoplasma DNA was detected in 32.6% of patient samples.
- Mycoplasma pneumoniae was found in 10% of samples, with other Mycoplasma and Ureaplasma species also identified.
- No significant clinical differences were observed between colonized and non-colonized patients, except for serum IgE levels in asthmatics.
Conclusions:
- Urogenital Mycoplasma species, in addition to Mycoplasma pneumoniae, can colonize the airways of children with chronic respiratory diseases.
- This study found no association between Mycoplasma colonization and chronic asthma diagnosis in the pediatric population.
Background And Objective:
Recently, much attention has been given to the possible role played by pathogens that colonize neonatal or paediatric airway and their potential involvement in chronic respiratory disease. The goal of the current study was to evaluate the prevalence of Mycoplasma organisms in the BAL fluid of paediatric patients suffering from a variety of chronic respiratory diseases to determine if there was any clear disease association with bacterial presence.
Methods:
We examined 319 paediatric BAL samples for the presence of M.genitalium, M.hominis, U.urealyticum, U.parvum and M.pneumoniae DNA with species-specific PCR.
Results:
Mycoplasma DNA was found in 32.6% (104/319) of patient samples; 10% (32/319) for M.pneumoniae, 8.8% for U.parvum, 2.8% for U.urealyticum; 4.7% for M.hominis and 9.1% for M.genitalium. There were no significant clinical and laboratory differences except serum IgE in asthmatics according to Mycoplasma colonization or not. Elevated levels of IgE were found more often in Mycoplasma DNA-negative patients than patients with bacterial DNA, 85/109 versus 24/109 respectively (P<0.0001). There was no difference in the frequency of Mycoplasmas between the asthmatics and the non-asthmatics; 30.6% (69/225) versus 37.2% (35/94) for Mycoplasma 16S DNA, and 8% versus 14.9% for M.pneumoniae, respectively.
Conclusions:
Our data indicate that in addition to M.pneumoniae, urogenital Mycoplasma species may colonize the airway of patients with chronic respiratory diseases. There was, however, no association between chronic asthma diagnosis and Mycoplasma colonization in this study.
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