CAUSES TUBERCULOSIS (TB): Causes of Tuberculosis
Home Eyes EARS MOUTH NOSE SKIN

Respiratory system
Respiratory Diseases
Type and Definition of Asthma Asthma Causes Asthma Symptoms Treatments Asthma Prevention Asthma Exams and Tests - Asthma Attack Asthma in Adults Signs and symptoms - Occupational Asthma Parents and Asthma Seniors and Asthma Triggers for Asthma When to Seek Medical Care

Lung Cancer Type and Definition Lung Cancer Causes Lung Cancer Symptoms Lung Cancer Treatment Lung Cancer Surgery Lung Cancer Prognosis Lung Cancer Prevention
Laryngeal Cancer Type and Definition Laryngeal Cancer Diagnosis Laryngeal Cancer Causes and Symptoms Laryngeal Cancer Staging Laryngeal Cancer Treatment Alternative Treatment Laryngeal Cancer Laryngeal Cancer Prognosis
Bronchal Adenoma Bronchial Adenoma Symptoms Bronchial Adenoma Treatment
Type of Bronchitis Bronchitis Causes Bronchitis Symptoms Bronchitis Treatment
Aspergillosis Bronchiectasis Byssinosis Cough Hantaviruses Hay Fever Laryngitis Nasal Polyps Respiratory Failure
Type of Emphysema Emphysema Causes Emphysema Symptoms Emphysema Treatment Emphysema Prevention Emphysema Surgery
Pneumonia Viral Pneumonia Bacterial Pneumonia Other Types of Pneumonia Pneumonia Diagnosis and treatment
Tuberculosis: Type and Definition Causes Tuberculosis Symptoms Tuberculosis Treatment Tuberculosis Prevention Tuberculosis
Circulatory system Digestive system Endocrine system



CAUSES TUBERCULOSIS (TB)



 All cases of TB are passed from person to person via droplets. When someone with TB infection coughs, sneezes, or talks, tiny droplets of saliva or mucus are expelled into the air, which could be inhaled by another person.

 Once infectious particles reach the alveoli, small sacs in your lungs, another cell called the macrophage engulfs the TB bacteria.

 Then the bacteria are transmitted to your lymph system and bloodstream and spread to other organs.

 The bacteria further multiply in organs that have high oxygen pressures, such as the upper lobes of your lungs, your kidneys, bone marrow, and meninges—the membranelike coverings of your brain and spinal cord.

 When the bacteria cause clinically detectable disease, you have TB.

 People who have inhaled the TB bacteria, but in whom the disease is controlled are referred to as infected. They have no symptoms, frequently have a positive skin test, yet cannot transmit the disease to others.

 Risk factors for TB include the following:

 HIV infection

 Low socioeconomic status

 Alcoholism

 Homelessness

 Crowded living conditions

 Diseases that weaken the immune system

 Migration from a country with a high number of cases

 Health care workers



auuuu.org ©2016.