What is the life cycle of tuberculosis?

What is the life cycle of tuberculosis?

TB infection happens in 4 stages: the initial macrophage response, the growth stage, the immune control stage, and the lung cavitation stage. These four stages happen over roughly one month.

What are the 3 stages of TB?

There are 3 stages of TB—exposure, latent, and active disease.

What are the major signs and symptoms of primary phase tuberculosis?

Signs and symptoms of active TB include:

• Coughing for three or more weeks.
• Coughing up blood or mucus.
• Chest pain, or pain with breathing or coughing.
• Unintentional weight loss.
• Fatigue.
• Fever.
• Night sweats.
• Chills.

How does Mycobacterium tuberculosis become dormant?

In an environment attractive for growth the bacterial population starts replicating, causes pathology and leads to reactivation of TB. A small population will stay in or fall into dormancy thus showing tolerance to drug treatment (Lewis, 2010).

How soon do TB symptoms appear?

How soon do symptoms appear? Most people infected with the germ that causes TB never develop TB disease. If TB disease does develop, it can occur two to three months after infection or years later.

What are the symptoms of latent TB?

The Difference between Latent TB Infection (LTBI) and TB Disease

• a bad cough that lasts 3 weeks or longer.
• pain in the chest.
• coughing up blood or sputum.
• weakness or fatigue.
• weight loss.
• no appetite.
• chills.
• fever.

What are the 5 causes of TB?

Risk factors for TB include:

• Poverty.
• HIV infection.
• Homelessness.
• Being in jail or prison (where close contact can spread infection)
• Substance abuse.
• Taking medication that weakens the immune system.
• Kidney disease and diabetes.
• Organ transplants.

Is it safe to live with TB patient?

While tuberculosis (TB) is a highly contagious disease, it’s also very treatable. The best way to avoid complications from the disease is to take medications regularly and complete the full course as prescribed. In the United States, people with TB can live a normal life, both during and after treatment.

When do TB symptoms start?

TB disease usually develops slowly, and it may take several weeks before you notice you’re unwell. Your symptoms might not begin until months or even years after you were initially infected. Sometimes the infection does not cause any symptoms.

Is TB cough dry or wet?

Cough lasting more than three weeks is often a first symptom of active tuberculosis (TB). It can start as a dry irritating cough. It tends to continue for months and get worse. In time the cough produces a lot of phlegm (sputum), which may be bloodstained.

Can you have active TB without symptoms?

A person with latent, or inactive, TB will have no symptoms. You may still have a TB infection, but the bacteria in your body is not yet causing harm. Symptoms of active TB include: A cough that lasts more than three weeks.

Can TB occur without cough?

Although tuberculosis is most well-known for causing a distinctive cough, there are other types of tuberculosis in which individuals don’t experience the symptom at all. Two types of the disease don’t produce a cough: Bone and joint TB and latent TB.