Tuberculosis (TB)
Tuberculosis (TB):
OverviewTuberculosis (TB) is an infectious disease caused by the bacterium Mycobacterium tuberculosis. Most TB cases are caused by M. tuberculosis, though other mycobacteria, like Mycobacterium bovis, can occasionally cause the disease. TB primarily affects the lungs but can also impact other parts of the body, such as the brain, kidneys, spine, or lymph nodes. In some cases, multiple areas can be affected simultaneously.
Types of TB
• Inactive TB (Latent TB Infection):
• TB germs are present in the body but remain inactive, causing no symptoms.
• People with inactive TB cannot spread the disease but may develop active TB later without treatment.
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• Active TB Disease
• Symptoms are present, and the disease can be transmitted to others.
• Without treatment, active TB disease can be fatal.
• TB germs become active when the immune system cannot prevent their growth.
Symptoms of Active TB
• Persistent cough (lasting three weeks or more)
• Chest pain
• Coughing up blood or sputum
• Fatigue and weakness
• Weight loss and loss of appetite
• Chills, fever, and night sweats
People with inactive TB do not show symptoms but remain at risk of developing active TB.
How TB Spreads TB spreads through the air when a person with active TB in the lungs or throat coughs, speaks, or sings, releasing germs. These germs can remain airborne for hours, especially in poorly ventilated spaces. People inhale these germs and may become infected. Active TB is most commonly transmitted to individuals in close contact with an infected person.
Risk Factors for TB Certain factors increase the risk of TB infection, such as:
• Frequent travel to or residence in countries where TB is common (e.g., parts of Asia, Africa, or Latin America).
• Living in high-density environments, such as homeless shelters, prisons, or jails.
• Spending time with someone who has active TB disease.
• Weakened immune systems due to health conditions (e.g., HIV, diabetes) or medications.
• Working in settings with higher TB exposure risks, such as hospitals or nursing homeshttps://amzn.to/4cXZPiF
• Active TB Disease
• Symptoms are present, and the disease can be transmitted to others.
• Without treatment, active TB disease can be fatal.
• TB germs become active when the immune system cannot prevent their growth.
Symptoms of Active TB
• Persistent cough (lasting three weeks or more)
• Chest pain
• Coughing up blood or sputum
• Fatigue and weakness
• Weight loss and loss of appetite
• Chills, fever, and night sweats
People with inactive TB do not show symptoms but remain at risk of developing active TB.
How TB Spreads TB spreads through the air when a person with active TB in the lungs or throat coughs, speaks, or sings, releasing germs. These germs can remain airborne for hours, especially in poorly ventilated spaces. People inhale these germs and may become infected. Active TB is most commonly transmitted to individuals in close contact with an infected person.
Risk Factors for TB Certain factors increase the risk of TB infection, such as:
• Frequent travel to or residence in countries where TB is common (e.g., parts of Asia, Africa, or Latin America).
• Living in high-density environments, such as homeless shelters, prisons, or jails.
• Spending time with someone who has active TB disease.
• Weakened immune systems due to health conditions (e.g., HIV, diabetes) or medications.
• Working in settings with higher TB exposure risks, such as hospitals or nursing homeshttps://amzn.to/4cXZPiF
Prevention
• For Inactive TB: Early treatment can help prevent the progression to active TB disease.
• For Active TB: Proper medical intervention and adherence to the treatment regimen can stop the disease from spreading and protect others.
• Vaccination: The BCG vaccine, commonly used in countries with high TB prevalence, offers protection against severe TB in children. However, it is not generally used in the United States.
Diagnosis and Testing The CDC recommends TB testing for individuals at higher risk. Two primary tests for TB infection exist:
• TB Blood Test (IGRA): Preferred for people who have received the BCG vaccine, as it is unaffected by the vaccine.
• TB Skin Test: A small amount of testing material is injected under the skin, and results are checked within two to three days.
If a test result is positive, additional examinations like chest X-rays and sputum tests are conducted to determine whether the TB is inactive or active.
Treatment
• For Inactive TB: Early treatment reduces the risk of developing active TB disease.
• For Active TB: A full course of medication is essential to eliminate the bacteria, improve health, and prevent transmission to others. Patients must adhere to their treatment plans as instructed by healthcare providers.
• For Inactive TB: Early treatment can help prevent the progression to active TB disease.
• For Active TB: Proper medical intervention and adherence to the treatment regimen can stop the disease from spreading and protect others.
• Vaccination: The BCG vaccine, commonly used in countries with high TB prevalence, offers protection against severe TB in children. However, it is not generally used in the United States.
Diagnosis and Testing The CDC recommends TB testing for individuals at higher risk. Two primary tests for TB infection exist:
• TB Blood Test (IGRA): Preferred for people who have received the BCG vaccine, as it is unaffected by the vaccine.
• TB Skin Test: A small amount of testing material is injected under the skin, and results are checked within two to three days.
If a test result is positive, additional examinations like chest X-rays and sputum tests are conducted to determine whether the TB is inactive or active.
Treatment
• For Inactive TB: Early treatment reduces the risk of developing active TB disease.
• For Active TB: A full course of medication is essential to eliminate the bacteria, improve health, and prevent transmission to others. Patients must adhere to their treatment plans as instructed by healthcare providers.
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Quick Facts
• TB is one of the leading infectious disease killers worldwide.
• In 2023, approximately 9,633 TB cases were reported in the United States.
• Without treatment, 1 in 10 people with inactive TB will develop active TB disease.
By staying informed, testing regularly, and seeking timely treatment, individuals can protect themselves, their families, and their communities from TB.
Quick Facts
• TB is one of the leading infectious disease killers worldwide.
• In 2023, approximately 9,633 TB cases were reported in the United States.
• Without treatment, 1 in 10 people with inactive TB will develop active TB disease.
By staying informed, testing regularly, and seeking timely treatment, individuals can protect themselves, their families, and their communities from TB.
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