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Published on: February 23, 2014
Cellulitis in childhood invasive pneumococcal disease: a population-based study
Jonathan B Gubbay1, Peter B McIntyre, Robin E Gilmour
1National Centre for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children's Hospital at Westmead and the University of Sydney, Sydney, New South Wales, Australia.
Insights
Pneumococcal cellulitis in children is uncommon, primarily affecting the face in those under two years old. This condition is often misdiagnosed initially and rarely involves meningitis or other serious complications.
Area of Science:
- Pediatrics
- Infectious Diseases
- Epidemiology
Background:
- Limited data exists on the age-specific incidence and clinical presentation of pneumococcal cellulitis in children.
- Pneumococcal cellulitis is a rare manifestation of invasive pneumococcal disease (IPD).
Purpose of the Study:
- To determine the age-specific incidence and clinical characteristics of pneumococcal cellulitis in children.
- To compare pneumococcal cellulitis with other forms of IPD in pediatric patients.
Main Methods:
- Retrospective review of cellulitis cases as a subset of prospectively collected IPD data.
- Systematic review of published literature on pneumococcal cellulitis.
- Analysis of prospective laboratory surveillance data from New South Wales, Australia (1997-2001).
Main Results:
- Of 1067 pediatric IPD cases, 38 (3.3%) were cellulitis (32 periorbital, 6 buccal).
- Cellulitis predominantly affected children under 2 years old (79%), with fewer underlying illnesses compared to other IPD types.
- Initial misdiagnosis occurred in 34% of cases; meningitis was uncommon (1.9% in literature cases).
Conclusions:
- Pneumococcal cellulitis is an infrequent but typically facial manifestation of IPD in children.
- The condition is most common in infants and toddlers, rarely associated with meningitis or other complications.
- Pneumococcal cellulitis is often not recognized upon initial medical assessment.
Aim:
There are few detailed data on the age-specific incidence and clinical pattern of pneumococcal cellulitis in children. We conducted a retrospective review of cellulitis as a subset of prospectively collected laboratory-identified invasive pneumococcal disease (IPD) and performed a systematic review of published literature.
Methods:
Prospective laboratory surveillance in urban regions of New South Wales, Australia, 1 June 1997-31 December 2001. Medical notes reviewed for each identified case and defined literature search strategy applied.
Results:
There were 1067 cases of IPD in children aged 0-17 years; 38 (3.3%) were cellulitis (32 periorbital, 6 buccal). Compared with other types of IPD, a greater proportion of cellulitis cases occur in children<2 years (30/38, 79% vs. 617/1029, 60.0%; P=0.004) in whom underlying illness was less common (0/30, 0% vs. 53/590, 9%; P=0.06). Initially, another diagnosis was made in 13 (34%) of cases; only five had a lumbar puncture, all normal. Of the 239 cases of pneumococcal cellulitis documented in the literature, 28 (11.7%) had the diagnosis made by means other than positive blood culture and 95% were facial or orbital with underlying illness (6%) and associated meningitis (1.9%) uncommon.
Conclusion:
Cellulitis is an uncommon focus in IPD in children, and is almost always facial. Most cases occur under 2 years of age, are seldom associated with meningitis or other complications, and are frequently not recognised on admission.
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