Rib lesions in chronic pulmonary tuberculosis

Area of Science:

• Paleopathology
• Infectious Disease Epidemiology
• Bioarchaeology

Background:

• Traditional diagnosis of skeletal tuberculosis relies on secondary lesions from hematogenous spread, found in less than 7% of cases, limiting paleodemographic and paleoepidemiological assessments.
• Chronic pulmonary tuberculosis, comprising about 90% of human cases, has been difficult to identify in skeletal remains.

Observation:

• Examined 445 skeletal remains from individuals who died of tuberculosis in the early 20th century.
• Identified skeletal lesions in 16% (70/445) of remains.
• Found that 56% (39/70) of these cases exhibited specific lesions on the internal aspect of ribs, indicative of chronic pulmonary infection.

Findings:

• A novel diagnostic approach for skeletal tuberculosis focuses on rib lesions associated with chronic pulmonary disease.
• These rib lesions, presenting as diffuse periostitis or localized abscesses, were observed in 16% of the skeletal sample.
• The presence of rib lesions, often mutually exclusive with secondary bone dissemination, effectively doubles the detectable sample of skeletal tuberculosis.

Implications:

• This research significantly enhances the ability to study the paleodemography and paleoepidemiology of tuberculosis.
• The identification of rib lesions provides a more accurate method for assessing the prevalence and impact of tuberculosis in past populations.
• This approach offers a valuable tool for bioarchaeologists and paleopathologists investigating infectious diseases in historical skeletal records.