---
title: "Transmissibility and Disease Progression of Asymptomatic Mycobacterium tuberculosis Infection, Lima, Peru"
id: "cdc-emerging-infectious-diseases-journal-10-transmissibility-and-disease-progression-of-asymptomatic-mycobacterium-tuberculosis-infection-lima-peru"
canonical_url: "https://medichelpline.com/clinical-feed/cdc-emerging-infectious-diseases-journal-10-transmissibility-and-disease-progression-of-asymptomatic-mycobacterium-tuberculosis-infection-lima-peru"
content_type: "clinical_feed_article"
specialty: "Infectious Disease"
source_name: "CDC Emerging Infectious Diseases Journal"
source_url: "https://wwwnc.cdc.gov/eid/article/32/4/25-1947_article"
published_at: "2026-04-09T04:00:00.000Z"
evidence_level: "Agency Feed"
license: "CC-BY-NC-4.0 / Informational Use"
---
# Transmissibility and Disease Progression of Asymptomatic Mycobacterium tuberculosis Infection, Lima, Peru
## Provenance & Clinical Metadata
- **Canonical URL:** https://medichelpline.com/clinical-feed/cdc-emerging-infectious-diseases-journal-10-transmissibility-and-disease-progression-of-asymptomatic-mycobacterium-tuberculosis-infection-lima-peru
- **Specialty:** [Infectious Disease](https://medichelpline.com/clinical-feed/infectious-disease.md)
- **Primary Source:** CDC Emerging Infectious Diseases Journal
- **Source URL:** [Original Journal Publication](https://wwwnc.cdc.gov/eid/article/32/4/25-1947_article)
- **Published At:** 2026-04-09T04:00:00.000Z
- **Evidence Rating:** Agency Feed
## Executive GIST (TL;DR)
Disclaimer: Early release articles are not considered as final versions. Any changes will be reflected in the online version in the month the article is officially released. Estimating the transmissibility of asymptomatic Mycobacterium tuberculosis infection can clarify its contribution to tuberculosis (TB) spread. We conducted a prospective cohort study in Lima, Peru, enrolling index TB patients and their household contacts (HHCs) and classifying patients by the presence of symptoms including cough, night sweats, weight loss, or fever. We followed HHCs with serial tuberculin skin testing and clinical evaluations. Among 4,296 child HHCs, adjusted estimates for baseline infection (prevalence ratio 0.62 [95% CI 0.37–1.03]), incident infection at 6 months (hazard ratio (aHR) 0.63 [95% CI 0.27–1.49]), and TB disease during 1 year of follow-up (aHR 0.74 [95% CI 0.35–1.56]) were all consistent with lower risk for infection and disease progression among HHCs of asymptomatic compared with symptomatic index patients. Although asymptomatic infections may be less transmissible than symptomatic infections, the high prevalence of asymptomatic patients in national surveys suggest that they may contribute substantially to transmission.
## Clinical Analysis & Structured Key Points
CDC Emerging Infectious Diseases Journal published a clinical update in Infectious Disease on 09 Apr 2026. The item focuses on Transmissibility and Disease Progression of Asymptomatic Mycobacterium tuberculosis Infection, Lima, Peru. Review the original article for the full source wording and details.
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