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Streptococcus milleri causing infection in man
Abstract:
We describe the microbiological and morphological characteristics of 151 strains of Streptococcus milleri isolated during the course of routine bacteriological investigations. Although these strains formed a fairly heterogeneous group, several constant features were identified which typify the species. Strept. milleri emerged as a major cause of pyogenic infection, clinical disease being characterized by localized collections of pus in almost every organ system. Bacteraemia due to Strept. milleri was a significant indicator of the presence of an occult abscess. Endocarditis was rare. The penicillins or erythromycin remain the drugs of choice for treating infections caused by this organism.
Insights
Streptococcus milleri is a common cause of pyogenic infections, often presenting as localized abscesses. Bloodstream infections indicate an occult abscess, with penicillin or erythromycin being the preferred treatments.
Area of Science:
- Microbiology
- Infectious Diseases
- Clinical Bacteriology
Background:
- Streptococcus milleri group bacteria are increasingly recognized in clinical settings.
- Understanding their microbiological and morphological characteristics is crucial for diagnosis and treatment.
Purpose of the Study:
- To characterize the microbiological and morphological features of Streptococcus milleri strains.
- To identify key features that typify the species.
- To understand the clinical significance and common manifestations of Strept. milleri infections.
Main Methods:
- Isolation and characterization of 151 strains of Streptococcus milleri.
- Routine bacteriological investigations.
- Analysis of clinical data associated with isolated strains.
Main Results:
- Identified constant microbiological and morphological features despite strain heterogeneity.
- Strept. milleri is a major cause of pyogenic infections with localized pus collections across organ systems.
- Bacteraemia frequently indicated the presence of an occult abscess; endocarditis was uncommon.
Conclusions:
- Penicillins and erythromycin are the recommended treatments for Strept. milleri infections.
- Early identification and appropriate antimicrobial therapy are essential for managing Strept. milleri-associated diseases.
- Bacteraemia serves as a critical marker for underlying abscesses.