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Missed opportunities for tuberculosis diagnosis
S L Bailey1, M H Roper, M Huayta
1Brighton and Sussex University Hospitals National Health Service Trust, Royal Sussex County Hospital, Brighton, UK. slbailey@doctors.org.uk
Summary
More sensitive tuberculosis (TB) tests could have detected over half of smear-negative cases earlier, reducing disease spread. Earlier diagnosis is crucial for timely treatment and public health in resource-poor settings.
Area of Science:
- Global Health
- Infectious Diseases
- Diagnostic Accuracy
Background:
- Sputum smear microscopy, the primary tuberculosis (TB) diagnostic tool in resource-limited settings, has low sensitivity.
- Smear-negative, culture-positive TB cases are often missed, leading to delayed diagnosis and continued Mycobacterium tuberculosis transmission.
- More sensitive diagnostic methods are needed to improve early TB detection.
Purpose of the Study:
- To determine the potential for earlier tuberculosis (TB) diagnosis using more sensitive tests.
- To estimate the proportion of TB cases that could have been identified sooner than their actual diagnosis date.
- To assess the impact of delayed diagnosis on TB transmission.
Main Methods:
- Retrospective cohort study conducted in urban Peru.
- Involved patient interviews and clinical record reviews to identify healthcare interactions prior to TB diagnosis.
- Focused on individuals with symptoms suggestive of TB.
Main Results:
- 58% of 212 participants had at least one healthcare interaction before their confirmed TB diagnosis.
- Among those with prior interactions, the median number of such episodes was three.
- The median delay from initial presentation to TB diagnosis was 26 days.
Conclusions:
- Significant missed opportunities exist for earlier tuberculosis (TB) diagnosis.
- Delayed diagnosis contributes to prolonged Mycobacterium tuberculosis spread within communities.
- Prioritizing sensitive, resource-appropriate diagnostic tests is essential for effective TB control.
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