Effects of Respiratory Isolation for Tuberculosis to Reduce Community-based Transmission: A Systematic Review.

Area of Science:

• Public Health
• Infectious Disease Epidemiology
• Health Policy

Background:

• Respiratory isolation is a key strategy to prevent tuberculosis (TB) transmission in communities.
• Current guidelines for the duration of isolation are limited, leading to heterogeneous implementation.
• This review aims to synthesize evidence to inform national TB guidelines.

Purpose of the Study:

• To systematically review the evidence on the effectiveness and impact of respiratory isolation for tuberculosis (TB).
• To inform the development of evidence-based guidelines for TB isolation practices.

Main Methods:

• A systematic review of 6 databases was conducted.
• Data were extracted by 8 reviewers on outcomes including TB transmission, mortality, costs, and mental health impacts.
• A convergent integrated approach synthesized quantitative and qualitative findings.

Main Results:

• Limited direct comparative data exist for respiratory isolation versus no isolation, particularly post-treatment initiation.
• Modeling studies suggest potential transmission reduction but with assumptions; one RCT found no difference in TB incidence in contacts.
• Qualitative studies highlighted adverse impacts of isolation on employment, education, food security, mental health, stigma, and social isolation, disproportionately affecting marginalized groups.

Conclusions:

• There is a lack of robust data supporting current respiratory isolation practices for TB, especially after effective treatment.
• Public health decisions on respiratory isolation should carefully consider the adverse effects on individuals against potential reductions in community transmission.