Chloramphenicol in the treatment of enteric fever

Area of Science:

• Infectious Diseases
• Microbiology
• Pharmacology

Background:

• Acute enteric fever, including typhoid and paratyphoid fevers, remains a significant global health concern.
• Concerns regarding decreasing chloramphenicol efficacy have been frequently cited, necessitating a review of current evidence.
• Antimicrobial resistance patterns, particularly R-factor mediated resistance, have evolved since the mid-20th century.

Purpose of the Study:

• To evaluate the current efficacy of chloramphenicol for treating acute enteric fever.
• To assess the validity of claims regarding diminished chloramphenicol effectiveness over the past two decades.
• To identify key criteria for comparing chloramphenicol with alternative antimicrobial agents.

Main Methods:

• A comprehensive literature survey was conducted to analyze studies on chloramphenicol efficacy in enteric fever.
• Data on treatment duration, clinical response, and resistance patterns were reviewed.
• Comparative analysis frameworks for antimicrobial selection were examined.

Main Results:

• The literature survey did not substantiate widespread claims of decreasing chloramphenicol efficacy, excluding R-factor mediated resistance.
• Regional variations in the time to achieve defervescence with chloramphenicol treatment have been observed since the 1950s.
• Several factors beyond clinical efficacy, including organism excretion rates, relapse rates, administration, toxicity, cost, and resistance development, are crucial for comparing antimicrobials.

Conclusions:

• Chloramphenicol continues to demonstrate effectiveness in treating acute enteric fever.
• Claims of declining efficacy are not consistently supported by literature, with noted exceptions for specific resistance mechanisms.
• A multifaceted approach considering clinical outcomes, microbiological impact, and practical aspects is essential when selecting antimicrobials for enteric fever.