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Changing spectrum of primary pyomyositis in North India
Krishna Divyashree1, Ashok Kumar Pannu2, Atul Saroch2
1Senior Resident, Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Nehru Hospital, Chandigarh, India.
Abstract:
Recent data have demonstrated the changing epidemiology of primary pyomyositis worldwide. Our hospital-based retrospective study investigated the clinical and microbiological spectrum of primary pyomyositis between 2013 and 2021 in PGIMER (Chandigarh), India. Over a quarter had predisposing conditions, mainly diabetes mellitus and immunosuppressive therapy. Fever, muscle pain, local swelling and breathlessness were the usual presentations, with quadriceps, iliopsoas and gluteal muscles commonly affected. Staphylococcus aureus was the predominant cause, with c.50% methicillin-resistant strains. Almost two-thirds presented with metastatic infection (stage 3 pyomyositis), frequently with septic lung emboli. Patients with methicillin-sensitive and resistant Staphylococcus aureus had a similar incidence of metastatic infection. In-hospital mortality was c.10% and was strongly associated with a high international normalised ratio. Primary pyomyositis remains a significant problem, with a dramatic increase in community-associated methicillin-resistant Staphylococcus aureus.
Insights
Primary pyomyositis is increasing globally, often caused by community-associated methicillin-resistant Staphylococcus aureus. This infection frequently spreads to the lungs, with mortality linked to high international normalised ratio.
Area of Science:
- Infectious Diseases
- Epidemiology
- Microbiology
Background:
- Primary pyomyositis epidemiology is evolving globally.
- Understanding its clinical and microbiological spectrum is crucial.
Purpose of the Study:
- To investigate the clinical and microbiological features of primary pyomyositis.
- To analyze trends between 2013 and 2021 in India.
Main Methods:
- Retrospective hospital-based study.
- Data collected from PGIMER, Chandigarh, India.
- Analysis of patient demographics, clinical presentation, microbiology, and outcomes.
Main Results:
- Predisposing conditions like diabetes mellitus and immunosuppression were common.
- Staphylococcus aureus, including methicillin-resistant strains, was the main pathogen.
- Two-thirds presented with metastatic infection, often with septic lung emboli.
- In-hospital mortality was approximately 10%, associated with high international normalised ratio.
Conclusions:
- Primary pyomyositis is a significant health concern with increasing incidence.
- Community-associated methicillin-resistant Staphylococcus aureus is a growing threat.
- Prompt diagnosis and management are essential to improve patient outcomes.
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