Persistent Bacterial Infections, Antibiotic Treatment Failure, and Microbial Adaptive Evolution

Area of Science:

• Microbiology
• Infectious Diseases
• Public Health

Background:

• Antibiotic resistance is a major global health threat, projected by the WHO to be the leading cause of death by 2050.
• Many bacterial infections, particularly persistent ones caused by opportunistic pathogens, are difficult to diagnose and characterize, often evading effective treatment.
• Modern lifestyles contribute to an increase in patients with reduced immune defenses, making them more susceptible to these challenging infections.

Purpose of the Study:

• To highlight the underappreciated threat of persistent bacterial infections to public health.
• To explain why current antibiotic resistance predictions may be overly optimistic.
• To discuss the diagnostic and therapeutic challenges posed by persistent infections.

Main Methods:

• This study is an overview and synthesis of existing research on antibiotic resistance and persistent bacterial infections.
• It analyzes the mechanisms contributing to infection persistence and their diagnostic limitations.
• The review examines the evolutionary pathways from colonization to antibiotic resistance in persistent infections.

Main Results:

• Persistent infections are often overlooked due to diagnostic difficulties and lack of precise genetic markers.
• Even susceptible bacteria can survive antibiotic treatment, leading to persistent infections.
• These persistent infections carry a significant risk of developing high-level antibiotic resistance through accumulated mutations.

Conclusions:

• The threat of antibiotic resistance is potentially underestimated due to the prevalence of persistent infections.
• Effective diagnostic and eradication strategies for persistent infections are urgently needed.
• Addressing persistent infections is crucial to mitigating the future impact of antibiotic resistance.