Brucellosis

Brucellosis is an infectious disease that is transmitted to humans from animals, most often through contact with cattle and small ruminants or through the consumption of unpasteurised milk and products made from it. The disease affects the joints, nervous system and internal organs, so if infection is suspected, an infectious disease specialist is needed. The doctor collects information about contacts with animals and prescribes an examination to confirm or rule out the infection.

Which doctorInfectious disease specialist
UrgencyDo not delay
Reviewed byMedical editorial team
Updated

If symptoms resembling brucellosis appear, you should consult an infectious disease specialist as soon as possible. If the condition deteriorates sharply, a high temperature rises, or severe pain occurs, an urgent medical examination is needed.

Main

  • Infection comes from animals: through raw milk, unpasteurised cheeses and contact with infected livestock.
  • The pathogen persists inside cells: that is why the illness drags on for months and returns after a temporary improvement.
  • Farm workers are at risk: vets, shepherds, milkmaids, cattle hands and meat processing plant employees.
  • The diagnosis is made by an infectious disease specialist: based on questioning about contact with animals, examination and laboratory confirmation.
  • Brucellosis is not transmitted from person to person in everyday life, so there is no need to fear those around you.

What is brucellosis

Brucellosis is an infectious disease that is transmitted to humans from animals. It can run an acute course or become a long-term form affecting various organs.

What happens in the body

The causative agent of brucellosis is a bacterium that lives in the body of domestic animals and enters the human body. Infection occurs through contact with sick animals or through the consumption of contaminated livestock products. The bacterium penetrates through damaged skin, mucous membranes, or together with inhaled dust. The causative agent is then carried with the bloodstream to various organs and tissues. The immune system responds to the invasion, and the person develops a fever, weakness and sweating. The illness can drag on for months, because the bacterium is able to persist inside cells for a long time. Because of this, the condition often returns after a temporary improvement, and the person again feels unwell.

What causes it to develop

  • Contact with sick animals: calving, shearing and slaughter are especially dangerous, when the bacterium gets onto the skin and mucous membranes.
  • Raw milk: drinking unboiled milk from sick animals directly transfers the causative agent into the human body.
  • Unripened dairy products: unpasteurised cheeses, curd cheese and butter retain live bacteria and become a source of infection.
  • Damaged skin: small wounds, grazes and cuts open the way for bacteria to get inside, even if the person does not notice them.
  • Inhaling dust: in livestock premises the dust contains the causative agent, and it enters the respiratory tract together with the air.

Who encounters this more often

This condition is encountered more often by people who constantly come into contact with domestic animals through work or daily life. These are livestock farm workers, veterinarians, shepherds and meat processing plant employees. The risk group also includes milkmaids, cattle hands and those who take part in slaughter and carcass processing. Rural residents who keep livestock in their yard encounter the causative agent more often than city dwellers. The danger is higher where raw milk is drunk and home-made cheeses are made without heat treatment. Children and elderly people cope with the condition more severely because of the characteristics of their immunity. If a person works with animals, it is worth paying closer attention to protecting the skin and to the quality of products from the farm.

What symptoms can occur?

Brucellosis can begin unnoticed, so the first changes are easily mistaken for ordinary fatigue. Paying close attention to how you feel helps you understand when to see a doctor without delay.

How it is noticed at the very beginning

Brucellosis often starts with a rise in temperature, weakness and pain in the muscles and joints, which a person puts down to overwork. The temperature may rise gradually, or it may rise sharply, and then chills and exhaustion join in. The weakness does not go away after rest and interferes with everyday tasks, work and household chores. Pain in the muscles and joints feels like aching, it gets worse with movement and is not related to exertion. At night sweating appears, because of which you have to change your underwear and wake up. Headache and loss of appetite complete the picture, but on their own seem unimportant. If such signs persist for several days and do not go away, it is worth seeing an infectious disease specialist without waiting for things to get worse.

Signs that occur most often

  • Rise in body temperature: the fever may rise gradually or suddenly, and it is often the first reason for concern.
  • General weakness and fatigue: strength does not return after rest, usual tasks are harder and take noticeably more time.
  • Pain in the muscles and joints: there is an aching that gets worse with movement and makes it hard to move and work freely.
  • Sweating, especially at night: heavy sweating during sleep disrupts rest and makes you wake up, and by morning leaves you exhausted.
  • Headache: it can be persistent and is poorly relieved by rest, which reduces attention and ability to work.
  • Loss of appetite: food stops being enjoyable, portions get smaller, and together with other signs this weakens the body.

When to seek help urgently

When to seek help urgently
SignHow urgentWhat to do
Symptoms similar to brucellosisIn the near futureSee an infectious disease specialist
Sharp deterioration of the conditionUrgentlyAn urgent medical examination is needed
High temperatureUrgentlyDo not put off a visit to the doctor
Severe painUrgentlySeek medical help
The condition is not improvingIn the near futureConsult an infectious disease specialist

Examinations and tests

Examination for brucellosis is based on history-taking, physical examination and laboratory confirmation. The doctor establishes contacts with animals and cases of consuming raw dairy products.

How the examination begins

The examination begins with history-taking and examination by an infectious disease specialist, who clarifies possible contacts with animals and consumption of raw dairy products. The doctor asks in detail about how long ago the complaints appeared, where the person has been and with whom they have been in contact. The examination helps to notice enlargement of the liver, spleen and lymph nodes, as well as changes in the joints. This information adds up to a picture that determines exactly which laboratory tests need to be ordered. Without such history-taking, it is easy to miss the source of infection and to misjudge the test results. Laboratory confirmation is necessary because the signs of brucellosis resemble the manifestations of other conditions. Therefore, the diagnosis is made by an infectious disease specialist on the basis of history-taking, examination and laboratory tests, and not by a single symptom. Tell your doctor about trips to rural areas, work with animals and any products that you have eaten without heat treatment.

What is ordered and what it shows

What is ordered and what it shows
ExaminationWhat it showsWhen it is ordered
Blood test for antibodies to the causative agentThe presence of an immune response to brucellaWhen brucellosis is suspected
Bacteriological examination of bloodThe causative agent itself in the biological fluidTo confirm the diagnosis
Bacteriological examination of other biological fluidsThe causative agent outside the bloodstreamWhen individual organs are affected
Complete blood countSigns of inflammation and changes in cellsAt the beginning of the examination
Instrumental examinations of the joints and organsStructural changes in the tissuesFor complaints about the joints or organs

What is worth preparing for the appointment

  • Discharge summaries: take all medical documents that describe past visits and established conditions, so that the doctor sees the full picture.
  • Test results: bring previous laboratory reports, because comparison with new data helps to assess changes more accurately.
  • List of complaints: write down when and how your well-being, temperature and pain changed, so that you do not forget anything at the appointment.
  • Information about contacts: recall and describe contact with animals, trips and consumption of raw dairy products.
  • Questions for the doctor: formulate in advance what you want to clarify, so that the appointment goes calmly and to the point.

Which doctor should I see?

The choice of doctor for brucellosis comes down to one specialty, while treatment is built from several directions. Below — who manages this condition, what happens at the appointment and what the result rests on.

Which specialist manages this condition

Brucellosis is managed by an infectious disease physician, since this is an infectious disease with a long course. It is the infectious disease physician who determines the need for antibacterial therapy and decides where to carry it out — at home or in hospital. If there is no specialist of this profile nearby, one can start with a general practitioner at the place of residence, who, once the diagnosis is confirmed, will refer the patient to an infectious disease physician. At the first appointment the doctor clarifies how long ago the complaints appeared and with what the patient associates their onset. He asks about contact with animals, about working with raw materials of animal origin and about trips to rural areas. Separately, it is established whether similar episodes occurred before and how they progressed. The doctor examines the joints, the skin and assesses enlargement of the lymph nodes and liver. Then he prescribes laboratory confirmation and monitoring of the condition over time. Practical conclusion: do not postpone a visit to an infectious disease physician if the complaints persist for weeks and recur in waves.

What treatment consists of

  • Selection of antibacterial therapy: the infectious disease physician chooses it individually, taking into account the form and severity of the course, as well as the patient's concomitant conditions.
  • Symptomatic treatment: it is aimed at reducing temperature and easing pain, which alleviates the general condition and helps the patient tolerate the main stage of care.
  • Monitoring and control of tests: regular assessment of the condition and laboratory parameters allows changes to be noticed in time and the approach to managing the patient to be adjusted.
  • Physiotherapy and rehabilitation: when the joints are affected, they help restore mobility and reduce stiffness, so they are added as the acute manifestations subside.
  • Treatment in hospital: in severe cases, care is provided in a hospital setting, where round-the-clock monitoring and timely intervention are possible if the condition worsens.

What depends on the patient themselves

The regularity of follow-up with an infectious disease physician largely determines how manageable the course of brucellosis will be. Missed visits and interrupted follow-up make it difficult to assess the dynamics and prevent the doctor from noticing the return of complaints in time. It is important for the patient to report any new symptoms, even if they seem insignificant and unrelated to the underlying condition. It is worth recording when the temperature rises, which joints hurt and how long each episode lasts. Such records help the doctor see the whole picture, and not only on the day of the appointment. Separately, one should honestly tell about the remedies being taken, including those the person started taking on their own. If well-being worsens between visits, it is reasonable to contact the doctor rather than wait for the scheduled meeting. Practical conclusion: keep a simple diary of complaints and take it to every appointment — this speeds up the doctor's decisions.

What helps prevent an exacerbation?

This section is about what a person can do themselves to reduce the risk of a brucellosis flare-up. It will cover habits, regular monitoring and scheduled visits to the doctor.

What is changed in habits

Everyday habits with brucellosis directly affect how often flare-ups occur and how severe they are. Milk bought from private sellers should be boiled or bought pasteurised, because raw milk remains a common source of infection. Cheese, cottage cheese, kumis and other products made from unpasteurised milk are best excluded from the diet completely. When caring for livestock, wear protective clothing and gloves, especially during calving, shearing and cleaning of premises. After any contact with animals, wash your hands with soap, do not touch your face and do not eat before doing so. If there are sick animals on the farm, vaccinating them reduces the risk of transmitting the pathogen to humans. Following these rules does not replace the monitoring prescribed by a doctor, but it noticeably reduces the likelihood of reinfection and flare-up.

What should be kept under control

  • Body temperature: regular measurement helps to notice a rise, which often accompanies a flare-up and requires the doctor's attention.
  • General well-being: weakness, sweating and aching in the body may appear gradually and indicate activity of the process.
  • Joints and spine: pain and stiffness in these areas often intensify during a flare-up and serve as a reason for examination.
  • Taking the prescribed treatment: strict adherence to the doctor's recommendations without omissions helps to keep the condition under control.
  • Contacts with animals and products: recording such cases helps to understand what could have triggered the worsening of well-being.
  • Observation diary: brief notes about well-being give the doctor an accurate picture and help to adjust monitoring in time.

How often to see the doctor

Regular visits to the doctor are needed even when well-being remains good and nothing is troubling. Brucellosis can run in waves, and a flare-up sometimes begins insidiously, without pronounced signs. A scheduled examination allows changes to be noticed earlier than they become noticeable and severe. The doctor assesses the general condition, clarifies complaints and, if necessary, prescribes additional examinations. If weakness, sweating, joint pain or a rise in temperature appear, the visit should not be postponed. People working with animals should see the doctor especially attentively and not miss the scheduled examinations. Such monitoring does not guarantee the complete absence of flare-ups, but it helps to keep the situation under observation and to respond to changes in time.

What is worth remembering

Brucellosis remains a disease that is easily mistaken for a common cold or overwork, so recognising it can be difficult. Below are the main points that help make the right decision when brucellosis is suspected.

Key conclusions

Brucellosis develops after contact with infected animals or their products, and this fact often goes unnoticed by the person themselves. The infection is not transmitted from person to person in everyday life, so there is no need to fear those around you. The disease tends to run a protracted course: without a doctor's attention it can drag on for months and recur. The signs of brucellosis are non-specific — fever, weakness, pain in the joints and muscles — and they are easily attributed to other causes. That is why, with prolonged malaise, it is important to recall possible contact with animals and tell the doctor about it. Such a fact should not be concealed: it speeds up the recognition of brucellosis and the choice of the right approach. Do not put off a visit to a specialist if weakness and fever persist longer than usual.

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.

Can you catch brucellosis from a person?

No, brucellosis is not transmitted from person to person in everyday life. Infection occurs only from animals or through livestock products without heat treatment. Therefore, there is no need to fear the people around you, and isolating a patient to protect others is not required. The exception is rare cases associated with blood transfusion or transplantation, but in everyday life this route is practically never encountered.

How does brucellosis manifest in children?

In children, the disease usually runs a more severe course than in adults. The child becomes lethargic, refuses food, develops a fever and pain in the joints and muscles. Young children often cannot explain exactly what hurts, so parents notice only irritability, drowsiness and sweating. If the child has been in contact with animals or has drunk raw milk, this must be reported to the doctor.

Why is brucellosis dangerous for older people?

In older people, the disease more often runs a more severe and longer course. Age-related changes in immunity and concomitant conditions slow recovery and increase the risk of damage to the joints and internal organs. Weakness and sweating are tolerated worse, and the recovery period drags on. Therefore, at the first suspicious signs, an older person needs a doctor's examination without delay.

Can you work with brucellosis?

Usually, during the active manifestations, it is better not to work. Weakness, fever and joint pain make it hard to concentrate and increase the risk of mistakes, especially in physical work. The decision on when to return to work is made by the doctor, taking into account how you feel and the nature of your work. If the work involves animals, it is important to discuss protective measures for the future with the doctor as well.

Is sport allowed during the illness?

No, during the active manifestations it is better to postpone exercise. The body spends its strength fighting the infection, and training increases weakness and can trigger an exacerbation of joint pain. A return to usual activity is gradual, as you feel better and with the doctor's consent. An abrupt resumption of exercise often leads to the return of symptoms.

How does brucellosis affect pregnancy?

Brucellosis during pregnancy requires special attention from the doctor. The infection can affect the course of pregnancy and the condition of the fetus, so monitoring is carried out jointly by an infectious disease specialist and an obstetrician-gynaecologist. It is important for the woman to inform both specialists in advance about contacts with animals and about products she has eaten without heat treatment. Self-treatment during this period is unacceptable.

What complications occur with brucellosis?

Most often the joints and spine are affected, where persistent pain and stiffness develop. Damage to the nervous system, heart and other internal organs is possible, as well as enlargement of the liver and spleen. That is why the disease must not be left without monitoring: the later the examination is started, the higher the risk of long-term consequences. The severity of complications largely depends on the form and on how promptly medical help is sought.

When is emergency help needed for brucellosis?

Urgently — with a sharp deterioration in condition, high fever and severe pain. Confusion, severe headache, movement disorders and pronounced weakness are also grounds for immediate medical attention. In such cases, one should not wait for a scheduled appointment or try to endure it. The sooner a person is examined by a doctor, the lower the risk of a severe course.

Which doctor should I go to if there is no infectious disease specialist?

To a general practitioner at your place of residence. They will examine the patient, gather information about contacts with animals and, if brucellosis is suspected, refer them to an infectious disease specialist. In rural areas, one can also start with a feldsher, who will organise further examination. The main thing is not to postpone the visit if weakness and fever last longer than usual.

How long do I need to be monitored by a doctor?

Usually monitoring continues even after you feel better. Brucellosis tends to return in waves, so the doctor assesses the condition over time and, if necessary, prescribes repeat examinations. The duration of monitoring is determined individually, taking into account the form of the disease and the presence of residual joint pain. Visits should not be interrupted when you feel well.