Tuberculosis

Tuberculosis is an infectious disease caused by mycobacteria that most often affects the lungs. It is transmitted by airborne droplets when coughing, talking and sneezing. A prolonged cough, weakness, sweating and weight loss help to suspect it. With such signs, one consults a physician or a phthisiologist: examination and timely initiation of therapy help to stop the disease and protect loved ones.

Which doctorPhthisiologist, also — pulmonologist
UrgencyDo not delay
Reviewed byMedical editorial team
Updated

If tuberculosis is suspected, an appointment with a phthisiologist or pulmonologist should be made as soon as possible for examination. If marked weakness, breathlessness at rest, haemoptysis or prolonged fever occur, urgent medical attention is required.

Main

  • The causative agent is transmitted through the air: mycobacteria are released with droplets of saliva and sputum when coughing, sneezing or talking.
  • Cough for weeks: together with night sweats, weakness and weight loss, it becomes a reason for examination.
  • First doctor: a phthisiologist at a tuberculosis dispensary; if unavailable, start with a pulmonologist or a general practitioner.
  • Examination: chest X-ray or tomography, sputum analysis, skin tests, bronchoscopy.
  • Haemoptysis and shortness of breath at rest: require urgent medical attention, without postponing a visit to the doctor.

What is tuberculosis

Tuberculosis is an infectious disease that most often affects the lungs, but can also involve other organs. The causative agent is transmitted from person to person mainly by airborne droplets.

What happens in the body

Mycobacteria of tuberculosis enter the respiratory tract together with the tiniest droplets that a sick person releases when coughing, sneezing or talking. In most cases, the body's own defences prevent the causative agent from multiplying and keep it under control. If the defences weaken, the mycobacteria begin to actively divide in the tissues of the lung and gradually destroy them. At the site of multiplication, a focus of inflammation forms, which over time can enlarge and involve neighbouring areas. The person develops a prolonged cough, weakness, sweating and weight loss, although there may be no complaints at all. Without treatment, the focus can destroy lung tissue and spread the causative agent to other organs. If a persistent cough and general weakness appear, it is sensible to undergo an examination rather than wait for the condition to worsen.

What causes it to develop

  • Airborne transmission: the causative agent is released with droplets of saliva and sputum when coughing, sneezing or talking, so infection occurs when such air is inhaled.
  • Prolonged close contact: the risk is higher with prolonged contact with a sick person in a closed room where the causative agent accumulates in the air.
  • Weakened immunity: defences decline against the background of other diseases and conditions, and then the mycobacteria that have entered the body get the opportunity to multiply.
  • Inadequate nutrition and poor living conditions: a meagre diet and cramped housing weaken the body and make it easier for the causative agent to be transmitted from person to person.
  • Harmful habits: smoking damages the respiratory tract and prevents it from clearing itself, so it is easier for the causative agent to establish itself in the lungs.
  • Practical conclusion: a combination of several such circumstances markedly increases the risk, so it is worth taking care of one's own condition in advance.

Who encounters this more often

Tuberculosis is more often detected in people who live or work in close contact with a sick person, as well as in those whose body is weakened. In families and hostels where people spend a lot of time together in closed rooms, the causative agent is transmitted noticeably more easily. People with weakened immunity due to other diseases or conditions are more vulnerable to developing the disease after infection. Inadequate nutrition and poor living conditions add a constant strain on the body's defences. Smoking damages the respiratory tract and prevents it from clearing itself, so the risk is also higher in smokers. Adults fall ill more often, but a person of any age can become infected if they spend a long time near a source of infection. If someone close to you has the disease, it is sensible to undergo an examination and not postpone a visit to the doctor.

What symptoms can there be?

Tuberculosis can go without pronounced manifestations for a long time, so changes are not noticed immediately. It is important to know which signs require attention and when help is needed without delay.

How it is noticed at the very beginning

Tuberculosis often begins gradually, and the first changes are easily mistaken for ordinary fatigue after work or lack of sleep. A person notices that they tire more quickly, although the workload has remained the same, and rest does not restore alertness. Gradually appetite disappears, food seems tasteless, and weight begins to decrease without visible reasons. A cough appears that persists for weeks and does not go away after home remedies. The temperature may rise slightly, more often towards the evening, and the person attributes this to a cold. At night clothes become damp with sweat, and sleep ceases to be restorative. If such signs persist for a long time, it is worth seeing a doctor without waiting for deterioration.

Signs that occur most often

  • A cough that persists for a long time: it does not go away for weeks and is not related to a cold, so it becomes the first reason for examination.
  • Production of sputum, sometimes with an admixture of blood: the appearance of blood in the sputum changes the urgency of seeking help and requires a prompt consultation with a specialist.
  • Increased fatigue and weakness: strength decreases even with the usual workload, and ordinary rest ceases to restore working capacity.
  • Decreased appetite and weight loss: food loses its taste, portions decrease, and body weight falls without any change in diet.
  • Elevated body temperature, especially towards the evening: the rises are slight, but repeat day after day and are accompanied by chills.
  • Night sweats: the bed and clothes become damp by morning, and sleep becomes interrupted and does not bring rest.

When to seek help urgently

When to seek help urgently
SignHow urgentWhat to do
Suspected tuberculosisAs soon as possibleMake an appointment with a phthisiologist or pulmonologist
Pronounced weaknessUrgentlySeek medical help
Shortness of breath at restUrgentlyCall a doctor
HaemoptysisUrgentlyDo not postpone seeking help
Prolonged feverUrgentlySeek medical help

Examinations and tests

Examination for suspected tuberculosis begins with a conversation with the doctor and a physical examination, and special investigations only confirm or rule out the assumption. Below is a description of which examinations are used, what each of them shows and which materials are worth bringing to the appointment.

How the examination begins

The examination begins with the collection of complaints, medical history and a physical examination, which the doctor performs at the first appointment. He asks in detail about how you feel, past illnesses and possible contacts with sick people. He separately clarifies how long ago the changes in how you feel appeared and how they have changed over time. The doctor examines the patient, listens to the breathing and pays attention to enlarged lymph nodes. This information adds up to a preliminary picture and helps to understand which investigations are needed first. After the examination, special investigations are ordered that confirm the diagnosis and determine the form of the disease. This order allows important details not to be missed and helps to choose the precise direction of further testing.

What is ordered and what it shows

What is ordered and what it shows
ExaminationWhat it showsWhen it is ordered
Chest X-ray or computed tomographyChanges in the lungs and lymph nodesWhen damage to the respiratory organs is suspected
Sputum analysisThe presence of the causative agent in the secretionsTo confirm the diagnosis
Skin tests or blood testsAn assessment of infection of the bodyWhen it is necessary to clarify the infection
BronchoscopyThe condition of the airways from the insideWhen an internal examination is needed
Examination of contactsThe presence of infection in those around youWhen a case of the disease is identified

What is worth preparing for the appointment

  • Discharge summaries: bring medical documents from other institutions so that the doctor can see the full picture of your health.
  • Previous images: bring previous X-ray or tomography results, this will help to compare changes over time.
  • Test results: gather all laboratory investigations performed earlier, they will clarify the baseline data for assessment.
  • List of complaints: write down what bothers you and when, so that at the appointment you do not forget or miss anything.
  • Information about contacts: recall and note possible contacts with sick people, this is important for examining those around you.

Which doctor should I see?

The choice of a doctor for tuberculosis usually raises no doubts: the relevant specialist is a phthisiologist, and if one is not available nearby, care begins with a pulmonologist. Below — who manages this condition, what the care consists of, and what depends on the patient themselves.

Which specialist manages this condition

Tuberculosis is managed by a phthisiologist, and if one is unavailable, a pulmonologist is the first to take over. A phthisiologist works in a tuberculosis dispensary or office and manages the patient throughout the entire period of observation. A pulmonologist deals with diseases of the respiratory organs and, if tuberculosis is suspected, refers the person to a phthisiologist. At the first appointment, the doctor asks in detail about complaints, past illnesses and contacts with patients. Then they examine the patient, listen to the breathing and assess the general condition. Next, the doctor prescribes the necessary examinations and, based on their results, determines further tactics. If a relevant specialist is not available nearby, start with a pulmonologist or a general practitioner at your place of residence. This route does not delay the start of observation and helps to reach the right specialist more quickly.

What the treatment consists of

  • Selection of therapy by the doctor: the specialist determines the appropriate direction of care taking into account the form of the disease and the patient's condition, and independent changes are unacceptable.
  • Regular observation and monitoring of tests: the doctor monitors the course of the disease and the tolerability of the care, so visits and check-ups must not be missed.
  • Hospitalisation for certain forms or complications: in some cases care is provided in a hospital, where observation and care are organised around the clock.
  • Surgical intervention when indicated: sometimes an operation is required, and the decision about it is made by the doctor together with the relevant specialists.
  • Support of nutrition and routine: adequate nutrition and a measured daily routine help the body to endure long-term observation and recovery.

What depends on the patient themselves

Regularity of observation is the part of the result that rests precisely on the patient themselves. Tuberculosis is treated for a long time, so it is important to come to appointments at the appointed times and not to interrupt observation. If a person misses visits or changes prescriptions at their own discretion, the doctor loses control over the course of the disease. This becomes noticeable through worsening of well-being and through abnormalities in tests detected at the next check-up. Speak openly to the doctor about your condition, about side effects and about difficulties with the routine. An honest conversation helps the specialist to adjust the care in time and to support the patient. Keep the prescriptions and come to follow-up examinations even when you feel well. Calm and consistent following of the doctor's recommendations is the most reliable support in this situation.

What helps prevent an exacerbation?

This section is about what a person can do themselves to reduce the risk of a tuberculosis flare-up. It will cover habits, regular monitoring and control, which does not replace the treatment prescribed by a doctor.

What to change in habits

Giving up smoking is one of the habits that noticeably affect the course of tuberculosis and the risk of a flare-up. Tobacco smoke irritates the airways and prevents the lungs from recovering after the strain they have endured. Airiing out the flat and work premises reduces the concentration of the pathogen in the air if a sick person is nearby. Observing hygiene, using separate dishes and washing hands reduce the likelihood of transmitting the infection to loved ones. Strengthening the immune system through adequate sleep, feasible physical activity and a varied diet helps the body resist the disease. At the same time, it is important not to give up the treatment prescribed by a doctor for the sake of useful habits alone. If weakness, night sweats or weight loss appear, this should be reported to a doctor rather than put down to fatigue. Following these habits does not guarantee the absence of a flare-up, but it reduces the strain on the body and makes it easier to keep the condition under control.

What should be kept under control

  • Regular preventive check-ups: a routine visit to the doctor and a chest X-ray help to notice changes in the lungs before complaints appear.
  • Examination of contacts: if there is a sick person nearby, it is important to check those who live or work with them as well, in order to detect infection in time.
  • Your own well-being: weakness, cough, night sweats or weight loss are a reason not to wait, but to tell a doctor about them.
  • Hygiene and airing out: cleanliness in the home and a flow of fresh air reduce the concentration of the pathogen in the room where a person stays constantly.
  • Vaccination according to the schedule: a vaccination given at the proper time is one of the basic protective measures, and it is worth remembering it and checking with a doctor.
  • Giving up smoking: without tobacco smoke the lungs recover more easily, so this habit should be changed first of all.

How often to see a doctor

Regular monitoring by a doctor is needed even when well-being remains good and nothing is troubling you. Tuberculosis can run hidden, and changes in the lungs are sometimes noticeable only on examination, not by how you feel. Routine check-ups and a chest X-ray make it possible to see the onset of a flare-up in time and adjust the monitoring. For people in risk groups and those who have been in contact with a sick person, examination is prescribed more often than for others. If a person is undergoing the prescribed treatment, visits must not be skipped, even with clear improvement in the condition. If a cough, weakness, night sweats or weight loss appear, a visit to the doctor should not be postponed. The exact timing of the next check-up is determined by the doctor taking the condition into account, so it is better to clarify it at the appointment rather than set it yourself.

What is worth remembering

Tuberculosis remains a disease in which delay noticeably changes the course of events, and seeking medical help early offers more options. Below are the main points that help make a balanced decision and not lose time.

Key conclusions

Tuberculosis develops gradually, and in the early stage a person often attributes the loss of strength to fatigue or a cold, so a prolonged malaise is better not explained by overwork. A cough that lasts for weeks, night sweats, weight loss and fever without an obvious cause should raise concern. In tuberculosis, the pathogen is transmitted through the air, so prolonged contact with a patient in an enclosed space increases the risk of infection for those around them. The danger of tuberculosis is that without treatment, the destruction of lung tissue continues and it becomes harder to restore lost health. Talking to a doctor when tuberculosis is suspected is not a cause for shame: it is an ordinary medical situation faced by people of different means and lifestyles. Refusing examination out of fear or mistrust delays the start of care and increases the risk for loved ones. If alarming signs appear, it is reasonable not to wait until tuberculosis makes itself known more severely, but to discuss the condition with a specialist right away.

Portal Editorial TeamMedical editorial team

Covers what does not belong to a single specialty: how an appointment works, what to bring with you, how to read a referral. Every text is reviewed by a relevant doctor before publication.

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Questions and answers

Answered by the article’s medical editor.

How can tuberculosis be suspected in a child?

Usually parents notice not a cough but changes in behaviour. The child becomes lethargic, eats worse, loses weight, and a low temperature persists for a long time. At night the child sweats, and the cough does not go away after ordinary home remedies. With such signs, the child is shown to a paediatrician, and they decide whether an examination by a phthisiologist is needed.

How does tuberculosis progress in the elderly?

Often it progresses in an erased form and resembles ordinary weakness due to age. An elderly person complains less of a cough, and fatigue, poor appetite and weight loss come to the fore. The temperature rises slightly and inconsistently, so it goes unnoticed for a long time. Because of this, examination often begins later, when changes are already visible on the scan.

Can one become infected on public transport or in a shop?

The risk exists, but it is small. A short journey or a trip to the shops rarely leads to infection: this requires prolonged contact in a closed room where the pathogen accumulates in the air. What matters far more is how much time a person spends near a sick person at home or at work. Ventilation and fresh air reduce such a probability.

Is a tuberculosis patient constantly dangerous to others?

No, not constantly. While a person is releasing the pathogen, they can infect others, so doctors limit their contacts and monitor those close to them. After observation begins and the release of the pathogen decreases, the infectiousness diminishes. How dangerous a person is at a particular moment is determined by the doctor based on examination results, not by appearance.

What happens if it is not treated?

Without observation by a doctor, the destruction of lung tissue continues. The focus grows, affects neighbouring areas, and shortness of breath, haemoptysis and pronounced weakness appear. The pathogen can spread to other organs, and the condition gradually worsens. That is why a prolonged cough and weight loss are a reason not to wait, but to go to a specialist.

Is tuberculosis inherited?

No, it is not inherited. The disease is caused by mycobacteria, which enter the respiratory tract from a sick person through the air. Heredity can influence only the body's general resistance to infections. If someone in the family is ill, everyone who lives with them undergoes examination.

Can one work and study during observation?

Usually this question is decided by the doctor together with the patient. While a person is releasing the pathogen, they are not recommended to be in a group, so as not to infect others. When the release of the pathogen stops, the restrictions are lifted. The form of the disease and how one feels also influence whether a return to work or study is allowed.

Is sport allowed with tuberculosis?

Usually intensive exertion is temporarily given up. The body needs strength for recovery, and heavy training takes it away. Feasible activity in the fresh air, on the contrary, is beneficial, if the doctor does not object. The specific regimen depends on the form of the disease and how one feels, so it is better to discuss it with a specialist.

How does tuberculosis affect pregnancy?

Pregnancy does not exclude observation by a phthisiologist, but requires joint management with an obstetrician. The disease weakens the body, and changes in it against the background of pregnancy require more frequent monitoring. Doctors select care taking into account the stage and the woman's condition. Planning a pregnancy during unfinished observation is not advisable; this should be discussed with a doctor in advance.

How long does one need to be observed by a doctor?

Observation is lengthy, and its duration is determined by the doctor. It depends on the form of the disease, the extent of the changes and how the body responds to care. Even with good health, visits and follow-up examinations are not stopped before the due date. The exact dates of check-ups and tests are clarified at the appointment, and are not set for oneself independently.