Increasing pyomyositis presentations among children in Queensland, Australia

Moriarty, Paul, Leung, Clare, Walsh, Mark and Nourse, Clare (2015) Increasing pyomyositis presentations among children in Queensland, Australia. Pediatric Infectious Disease Journal, 34 1: 1-4. doi:10.1097/INF.0000000000000470

Author Moriarty, Paul
Leung, Clare
Walsh, Mark
Nourse, Clare
Title Increasing pyomyositis presentations among children in Queensland, Australia
Journal name Pediatric Infectious Disease Journal   Check publisher's open access policy
ISSN 1532-0987
Publication date 2015-01
Sub-type Article (original research)
DOI 10.1097/INF.0000000000000470
Volume 34
Issue 1
Start page 1
End page 4
Total pages 4
Place of publication Philadelphia, PA United States
Publisher Lippincott Williams and Wilkins
Collection year 2016
Language eng
Formatted abstract
Background:   Pyomyositis, usually associated with tropical climates, occurs less commonly in temperate regions and is most often caused by Staphylococcus aureus. Several community-acquired methicillin-resistant S. aureus (CA-MRSA) clones have emerged in Queensland since the beginning of the century, and they now account for a significant proportion of invasive staphylococcal infection. This study aims to describe trends in the rate of presentation, and the clinical and diagnostic features of pyomyositis, and to determine if trends are attributed to the emergence of CA-MRSA or other factors.

A 10-year retrospective cohort study of all patients presenting to Mater Children’s Hospital in Brisbane, Queensland, with pyomyositis between July 2002 and July 2012, was conducted. Data were collected for clinical features, microbiology, diagnostic tests, management and outcome. Trends in incidence, and clinical and diagnostic features of pyomyositis were analyzed.

   Thirty-four cases of pyomyositis were identified. There was a male predominance (79%), and the vertebro-pelvic muscles were most often affected. The rate of pyomyositis increased significantly during the study period from a rate of 2.04 cases per 10,000 emergency department admissions in the first quarter of the study, to 8.73 cases per 10,000 in the final quarter (peak rate 13.5 cases per 10,000 in 2008). A causative organism was identified in 22 cases, most commonly methicillin-susceptible S. aureus with CA-MRSA identified in 4 cases. Patients who required surgical intervention had longer hospital admission, longer time to resolution of inflammatory markers and a higher risk of complication at follow-up.

This study demonstrates an increasing incidence of pyomyositis in a temperate region, which is not attributable to the emergence of CA-MRSA. The reasons for this change in incidence are not clear.
Keyword Pyomyositis
Musculoskeletal infection
Staphylococcus aureus
Pediatric infection
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Mater Health Services Publications
Official 2016 Collection
School of Medicine Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 21 Apr 2015, 01:51:26 EST by System User on behalf of Scholarly Communication and Digitisation Service