Related Experiment Videos
[Familial microepidemics of tuberculosis]
R Vidal Pla1, R Roca Tey, M Miravitlles
1Servicio de Neumología, Hospital General Vall d'Hebron, Barcelona.
Abstract:
We report a microepidemic of tuberculosis (TBC) in a family of 12 members, 4 of which were parenteral drug abusers and 3 had anti-human immunodeficiency virus (HIV) antibodies. Four new cases were simultaneously diagnosed in the investigation of the contacts of a patient with extrapulmonary tuberculosis and acquired immunodeficiency syndrome. We review the requirements for the development of these epidemic outbreaks, both in noninfected communities and in the family contacts, where positive anti-HIV antibodies may increase the risk. We emphasize the importance of a systematic study of contacts in these families and the indication of chemoprophylaxis in all those sharing the same household, without age limit.
Insights
A family tuberculosis (TBC) outbreak occurred in 4 parenteral drug abusers and 3 individuals with anti-human immunodeficiency virus (HIV) antibodies. This highlights the need for household contact tracing and chemoprophylaxis in TBC and HIV co-infection cases.
Area of Science:
- Public Health
- Infectious Diseases
- Epidemiology
Background:
- Tuberculosis (TBC) remains a significant global health challenge, particularly in vulnerable populations.
- Human immunodeficiency virus (HIV) infection is a known risk factor for TBC reactivation and transmission.
- Parenteral drug abuse is associated with increased risk of infectious diseases, including TBC and HIV.
Observation:
- A microepidemic of TBC was identified within a family of 12 members.
- Four family members were parenteral drug abusers, and three had anti-HIV antibodies.
- Four new TBC cases were diagnosed during contact tracing of a patient with extrapulmonary TBC and acquired immunodeficiency syndrome (AIDS).
Findings:
- The study identified a high-risk environment for TBC transmission within a family unit.
- Positive anti-HIV antibodies were associated with an increased risk of developing TBC.
- Simultaneous diagnosis of multiple TBC cases suggests efficient household transmission.
Implications:
- Systematic contact investigation within families affected by TBC is crucial for early detection and control.
- Chemoprophylaxis should be considered for all household contacts, irrespective of age, in TBC and HIV co-infection scenarios.
- Understanding the interplay between TBC, HIV, and drug abuse is vital for targeted public health interventions.