What is tuberculosis and how dangerous is it?

Tuberculosis (TB) is a bacterial infection that primarily attacks the lungs but can affect any part of the body. Without treatment, TB is fatal in about half of cases. Even with modern treatment, TB kills over 1 million people annually. Drug-resistant TB strains make treatment more difficult and dangerous.

How does tuberculosis spread?

TB spreads through the air when a person with active pulmonary TB coughs, sneezes, speaks, or sings, releasing bacteria-containing droplets. You can only get TB from someone with active disease in their lungs or throat. Close, prolonged contact (living or working together) poses the highest risk. You cannot get TB from touching surfaces, sharing food, or brief contact.

What is the difference between latent and active TB?

Latent TB means you're infected with TB bacteria but not sick and can't spread the disease. About 5-10% of people with latent TB develop active TB in their lifetime, especially if their immune system weakens. Active TB causes symptoms and can spread to others. Both conditions are treatable, but active TB requires more intensive, longer treatment.

Is there a vaccine for tuberculosis?

Yes, the BCG (Bacille Calmette-Guérin) vaccine is used in many countries where TB is common. BCG is effective at preventing severe TB in children (TB meningitis) but provides variable protection against pulmonary TB in adults. In the U.S., BCG is not routinely used due to low TB prevalence and variable effectiveness.

What is drug-resistant TB?

Drug-resistant TB occurs when bacteria become resistant to standard TB medications. Multi-drug resistant TB (MDR-TB) doesn't respond to at least isoniazid and rifampin, the two most powerful TB drugs. Extensively drug-resistant TB (XDR-TB) is resistant to even more drugs. These forms require longer treatment (18-24 months) with more toxic, expensive medications and have lower cure rates.

Where is tuberculosis most common?

TB occurs worldwide but is most prevalent in Southeast Asia, Africa, and the Western Pacific. Eight countries account for two-thirds of global TB cases: India, Indonesia, China, Philippines, Pakistan, Nigeria, Bangladesh, and South Africa. Check the live outbreak data above for current TB trends.

Alaska

Tuberculosis in Alaska

5 Activo en Alaska

Tuberculosis (TB) is a contagious bacterial infection that primarily affects the lungs but can spread to other organs. It remains one of the world's deadliest infectious diseases, second only to COVID-19 in recent years. Track Tuberculosis activity and outbreaks specific to Alaska.

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¿Qué es Tuberculosis?

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. In 2022, 10.6 million people fell ill with TB, and 1.3 million died from the disease. One-quarter of the world's population is estimated to be infected with TB bacteria, though most have latent TB (not sick or contagious). TB is curable and preventable, yet it continues to claim lives, particularly in low and middle-income countries.

Síntomas

Persistent cough lasting 3+ weeks
Coughing up blood or mucus
Chest pain when breathing or coughing
Unintentional weight loss
Fatigue and weakness
Fever and night sweats
Chills and loss of appetite

Transmisión

TB spreads through airborne particles when a person with active pulmonary TB coughs, sneezes, speaks, or sings. Prolonged, close contact with an infected person increases transmission risk. TB is not spread by touching, sharing food, or brief contact. Poor ventilation increases transmission risk.

Período de Contagio: People with active pulmonary TB can be contagious until treated for 2-3 weeks; latent TB is not contagious

Prevención

Early diagnosis and treatment of active TB cases
Treatment of latent TB infection to prevent progression
BCG vaccination in high-burden countries (protects children)
Good ventilation in indoor spaces
Respiratory hygiene (covering mouth when coughing)
Isolation of infectious TB patients until no longer contagious
Regular screening for high-risk populations
UV light or air filtration in healthcare settings

Alaska Recursos de Salud

Información del departamento de salud local y orientación de prevención específica del estado

Estamos Monitoreando Alaska

Nuestra vigilancia impulsada por IA monitorea continuamente la actividad de Tuberculosis en todo Alaska. Rastreamos datos de departamentos de salud estatales, hospitales locales, informes del CDC y más de 50 fuentes de salud globales para proporcionar advertencia temprana de amenazas emergentes.

Reciba notificaciones instantáneas cuando la actividad de Tuberculosis aumenta en Alaska o en su condado específico.

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Alaska Departamento de Salud

Para alertas oficiales de salud del estado, ubicaciones de vacunación y orientación de salud pública específica de Alaska, visite el sitio web del departamento de salud de su estado.

→ Alaska Departamento de Salud → Encontrar Tuberculosis Vacunación Cerca de Usted → Avisos de Salud para Viajeros del CDC

Protegiéndose en Alaska

Ya sea que viva en Alaska, viaje allí o tenga familia en el estado, comprender la Tuberculosis prevención es esencial. Siga estas medidas de prevención basadas en evidencia:

Medidas de Prevención

Early diagnosis and treatment of active TB cases
Treatment of latent TB infection to prevent progression
BCG vaccination in high-burden countries (protects children)
Good ventilation in indoor spaces
Respiratory hygiene (covering mouth when coughing)
Isolation of infectious TB patients until no longer contagious
Regular screening for high-risk populations
UV light or air filtration in healthcare settings

Cuándo Buscar Atención Médica

Si experimenta síntomas de Tuberculosis en Alaska, contacte a su proveedor de atención médica de inmediato. El diagnóstico y tratamiento tempranos mejoran significativamente los resultados.

Síntomas de emergencia: Si experimenta síntomas graves, dificultad para respirar o signos de deshidratación, llame al 911 o vaya a la sala de emergencias más cercana.

Recursos Expertos y Referencias

Información confiable de las principales organizaciones de salud

CDC

Orientación oficial de los Centros para el Control y la Prevención de Enfermedades de EE. UU.

Ver Recursos del CDC →

WHO

Vigilancia global de enfermedades y directrices de la Organización Mundial de la Salud

Ver Recursos de la OMS →

Investigación

Últimas investigaciones revisadas por pares y estudios clínicos

Ver Investigación →

Contenido Revisado Médicamente

La información sobre enfermedades en Virus Watcher es revisada por nuestro Epidemiólogo Jefe, ex analista principal del CDC para el pronóstico FluSight. Los datos de brotes se agregan de fuentes verificadas incluyendo BEACON, ProMED, OMS, CDC y más de 50 agencias nacionales de salud. Esta información es con fines educativos y no debe reemplazar el asesoramiento médico profesional.

Última revisión: 2026-06-29

Preguntas Frecuentes

Preguntas frecuentes sobre Tuberculosis respondidas por nuestro equipo de epidemiología

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Obtenga Tuberculosis Alertas para Alaska

Reciba notificaciones instantáneas cuando la actividad de Tuberculosis aumenta en Alaska o sus destinos de viaje. Rastree más de 200 enfermedades con alertas basadas en ubicación. Utilizado por sistemas de salud, servicios de emergencias médicas, escuelas y viajeros de todo el mundo.

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