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Published on: September 5, 2017
Nontuberculous mycobacterial infection in children: a prospective national study
Christopher C Blyth1, Emma J Best, Cheryl A Jones
1Department of Immunology and Infectious Diseases, Sydney Children's Hospital, New South Wales, Australia.
Insights
Nontuberculous mycobacterial (NTM) infections in Australian children are rare, often affecting young, healthy individuals. Complete surgical excision offers the best treatment success, though recurrence remains a concern.
Area of Science:
- Pediatric Infectious Diseases
- Microbiology
- Epidemiology
Background:
- Nontuberculous mycobacterial (NTM) infections in Australian children lack established epidemiological data and management guidelines.
- Understanding the scope of NTM disease in this demographic is crucial for public health.
Purpose of the Study:
- To investigate the epidemiology, clinical presentation, and management outcomes of nontuberculous mycobacterial infections in Australian children.
- To identify risk factors and treatment efficacies for NTM infections in pediatric populations.
Main Methods:
- A nationwide active surveillance network identified pediatric NTM cases from July 2004 to June 2007.
- Detailed clinical data, including diagnosis, treatment, and outcomes, were collected from reported cases.
Main Results:
- 102 pediatric NTM cases were analyzed, with lymphadenitis being the most common presentation (68 cases).
- Mycobacterium avium-intracellulare complex was the most frequently isolated NTM species (48.5%).
- Complete surgical excision demonstrated a significantly higher treatment success rate (OR: 9.48) compared to other therapies.
Conclusions:
- The incidence of NTM infection in Australian children is estimated at 0.84 per 100,000.
- Infections predominantly affect young children without significant predisposing conditions.
- Despite treatment, a recurrence rate of 23.4% was observed, highlighting the need for effective management strategies.
Background:
The epidemiology and management of nontuberculous mycobacterial (NTM) infection in Australian children is unknown.
Methods:
From July 2004 to June 2007, clinicians identified children with NTM infection as part of a nationwide active surveillance network. Following notification, detailed data were collected.
Results:
From 192 reports, data were received on 153 cases (response rate: 79.7%). Of these, 102 met inclusion criteria. The median age was 2.9 years. Predisposing conditions were infrequent and included chronic respiratory disease (n = 12) and immunosuppression (n = 6). Lymphadenitis was the most frequent presentation (n = 68) with pulmonary and disseminated disease infrequent (n = 14 and 3, respectively). NTM was isolated in 68 cases with Mycobacterium avium-intracellulare complex most frequently isolated (33/68; 48.5%). Surgery was performed in 78 cases and 42 children were treated with antimycobacterial therapy. Twenty-five subjects received surgery and antimycobacterial therapy. Follow-up data were available for 77 children with recurrence observed in 18 cases. Complete excision was associated with a higher rate of treatment success when compared with all other therapies (OR: 9.48 [95% CI: 2.00-44.97], P = 0.001). Mycobacterium lentiflavum infection accounted for 4.4% of culture confirmed cases and had a lower rate of treatment success than other species (0% vs. 78.2%; P = 0.016).
Conclusions:
The incidence of NTM infection in Australian children is 0.84 of 100,000 (95% CI: 0.68-1.02). Infection occurs most often in young children without predisposing conditions. Despite therapy, there was recurrence in 23.4% of cases.
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