Extensively Drug-Resistant (XDR) Typhoid: Evolution, Prevention, and Its Management

Area of Science:

• * Infectious Diseases
• * Microbiology
• * Public Health

Background:

• * Typhoid fever, caused by *Salmonella enterica* serotype typhi, affects 21 million annually, with Pakistan being a high-risk area.
• * Decades of antibiotic misuse have led to multidrug-resistant and extensively drug-resistant (XDR) strains.
• * XDR typhoid outbreaks in Pakistan pose a significant global health risk due to potential intercontinental spread.

Purpose of the Study:

• * To review the epidemiology, prevention, management, and future outlook of XDR typhoid.
• * To highlight the critical threat posed by XDR typhoid strains, particularly in Pakistan.
• * To emphasize the need for enhanced antimicrobial stewardship and disease surveillance.

Main Methods:

• * This is a review article, synthesizing existing data and literature.
• * Focuses on epidemiological trends and clinical reports of XDR typhoid.
• * Discusses current treatment limitations and future strategies.

Main Results:

• * Pakistan faces a substantial burden of XDR typhoid, with 5274 reported cases out of 8188 total typhoid cases.
• * Azithromycin is the last remaining oral antibiotic effective against XDR typhoid, raising significant concerns.
• * XDR typhoid cases linked to Pakistan have been reported in the USA, UK, and Canada, indicating international spread.

Conclusions:

• * XDR typhoid in Pakistan is a major public health concern with global implications.
• * Coordinated national and international efforts are crucial for containment.
• * Failure to act may lead to a return to the pre-antibiotic era for typhoid treatment.