Brucellosis is a bacterial infection that people can catch from animals or contaminated dairy. It often causes fever, sweats, fatigue, and aches that can come and go. Many people with brucellosis feel unwell for weeks, and some have relapses that last months without treatment. It affects people who work with livestock or consume unpasteurized milk, and severe cases can occur in anyone. Treatment is with antibiotics taken for several weeks, and death is uncommon with prompt care.
Overview
BrucellosisSymptoms
Brucellosis often starts like a flu: fever, sweats (often at night), fatigue, headache, and aching joints or back. Early symptoms of brucellosis may come and go in waves. Some develop longer-lasting problems such as fever, weight loss, and joint pain.
Outlook and prognosis
Most people with brucellosis recover with timely, adequate antibiotics, though improvement can be gradual over weeks to months. Fatigue, joint aches, or low-grade fevers may linger or return, especially if treatment was delayed. Relapse risk decreases with combination therapy and follow-up.
Causes and risk factors
Brucellosis results from Brucella exposure via unpasteurized dairy, undercooked meat, animal handling, or laboratory aerosols. Risks rise with farming, veterinary or slaughterhouse work, hunting, or travel to endemic areas; weakened immunity or pregnancy increases severity. No hereditary risk is established.
Genetic influences
Genetics plays a minor role in brucellosis risk compared with exposure to infected animals or unpasteurized dairy. Small genetic variations in immune pathways may influence who gets sicker or recovers slower. These differences do not replace standard prevention, diagnosis, or treatment.
Diagnosis
Doctors consider travel or animal exposure and persistent fever, then order blood tests. Diagnosis of brucellosis relies on blood cultures and antibody tests; PCR may help. Imaging checks for complications in bones, heart, or liver.
Treatment and drugs
Brucellosis is treated with a combination of antibiotics, usually doxycycline plus rifampin, taken for at least 6 weeks to clear the bacteria and lower relapse risk. Pain relievers, rest, fluids, and gradual activity help symptoms. Severe cases may need IV antibiotics.
Symptoms
Brucellosis often feels like a stubborn flu that comes and goes, making ordinary days harder to get through. Early symptoms of brucellosis include fever, chills, night sweats, fatigue, headaches, and body aches that can make work or school tougher. Symptoms vary from person to person and can change over time. Without treatment, the fever and aches may return in cycles, and tiredness can linger for weeks or months.
Temperature often rises to 38–40°C (100.4–104°F) and then drops, sometimes repeating for days. Clinicians call this undulant fever, which means the fever comes in waves rather than staying steady. Chills can come with each spike, and this wave-like pattern is common in brucellosis.
Heavy sweating, especially at night, can soak clothes or sheets. Many people with brucellosis wake feeling drained the next morning.
Deep tiredness can make it hard to finish work, school, or chores. What once felt effortless can start to require more energy or focus.
Aching muscles can appear across the body, sometimes worse after activity. Climbing stairs or lifting groceries may feel uncomfortably strenuous.
How people usually first notice Brucellosis?
Brucellosis often starts like a stubborn flu that doesn’t go away: fever that can spike and fall in waves, drenching night sweats with a distinct “wet hay” smell, fatigue, headache, and aching muscles or joints. Many people first seek care after days to weeks of these recurring fevers—especially if they’ve had recent exposure to livestock, unpasteurized milk or soft cheeses, hunting wild game, or a job in veterinary or laboratory settings. Doctors are often tipped off by this exposure history plus persistent, nonspecific symptoms, which frames the first signs of brucellosis and how brucellosis is first noticed.
Types of Brucellosis
Brucellosis can look different from person to person, and symptoms may come and go over weeks or months. Daily life often makes the differences between symptom types clearer. Some notice a flu‑like start, while others feel bone and joint pain first, or develop belly symptoms after eating unpasteurized dairy. Understanding the main symptom patterns can help you track early symptoms of brucellosis and know what to share with your clinician.
Acute flu-like
Sudden fever, sweats, chills, and fatigue often appear within a few weeks of exposure. Headache and muscle aches are common, and appetite may drop. Many improve with treatment but can feel drained for a while.
Musculoskeletal pain
Joint pain and stiffness, often in the knees, hips, ankles, or wrists, can limit walking or lifting. Back pain from spine involvement may develop, sometimes with tenderness. Swelling may be mild or noticeable on some days.
Gastrointestinal focus
Nausea, belly discomfort, and loss of appetite can lead to unintentional weight loss. Some have constipation or diarrhea that alternates. Symptoms may flare after certain foods, especially unpasteurized dairy.
Neuro involvement
Headaches that linger, trouble concentrating, or mood changes can occur when the nervous system is affected. In rare cases, meningitis‑like symptoms—severe headache, neck stiffness, or sensitivity to light—appear. Seek urgent care for sudden severe symptoms.
Reproductive effects
Infections of the testes can cause scrotal pain and swelling in men. People of any sex may notice pelvic discomfort or changes around the time of infection. During pregnancy, infection increases risks and needs prompt specialist care.
Hepatic/splenic signs
Tenderness or a feeling of fullness under the ribs can point to liver or spleen enlargement. Low‑grade jaundice may show as yellowing of the eyes or dark urine. Blood tests often guide what’s happening inside.
Chronic/relapsing
After initial improvement, fatigue, low fevers, and aches can return in cycles. Relapses may be milder but frustrating and affect work or sleep. Keeping track of which type you experience most can help your healthcare team adjust care.
What genetics can tell you about symptoms
Certain HLA gene types seem to raise the chance of longer-lasting brucellosis, with more fatigue, joint pain, and recurring fevers. Variations in immune-regulating genes, like TNF-α and IL-10, can tilt inflammation up or down, shaping symptom intensity and how quickly symptoms improve.
Causes and risk factors
You can get brucellosis from Brucella bacteria through contact with infected animals or by eating unpasteurized milk or cheese. Some risks are modifiable (things you can change), others are non-modifiable (things you can’t). High-risk jobs include farming, veterinary care, slaughterhouse or meat processing, and lab work where bacteria can be inhaled. Living or traveling in areas where brucellosis is common and handling animal births or raw tissues are key risk factors for brucellosis. There is no known inherited risk, and weak immune defenses, chronic illness, or pregnancy can raise the risk of serious disease.
Environmental and biological risk factors
Brucellosis is most often picked up through everyday contact with infected animals or animal products, so risk depends on what you’re exposed to at work, at home, or while traveling. Doctors often group risks into internal (biological) and external (environmental). Knowing these risks can help you seek care quickly if early symptoms of brucellosis show up. Below are the main environmental and biological factors that can raise the chance of infection.
Close contact with infected cattle, goats, sheep, pigs, or dogs raises brucellosis risk. Handling hides, blood, urine, or tissues can expose you to the bacteria. Risk tends to be highest where animal disease control is limited.
Exposure to placentas, aborted fetuses, or birthing fluids carries a high bacterial load. Splashes to eyes, mouth, or skin can transmit brucellosis. Breathing in droplets during animal births can also spread it.
Raw milk, soft cheeses, or ice cream made from unpasteurized dairy can carry the bacteria. Pasteurization kills them, but without it they can survive refrigeration. This route is more common where infected herds are present.
Laboratory work with animal samples can generate tiny aerosols. Inhaling small amounts can be enough to cause brucellosis. Laboratory accidents are a recognized source of outbreaks.
Genetic risk factors
Your inherited immune traits can change how likely Brucellosis takes hold and how severe it becomes. Risk is not destiny—it varies widely between individuals. Researchers have linked several immune system genes to higher or lower susceptibility, and rare immune deficiencies can raise the chance of serious illness. These differences may also influence early symptoms of Brucellosis and whether infection becomes long-lasting.
Family history: Clustering of cases in some families suggests inherited immune differences can raise susceptibility. It does not mean you will develop brucellosis.
HLA types: Variations in HLA (immune ID markers) can change how well your body flags Brucella for attack. Some HLA patterns have been linked to higher brucellosis risk or more prolonged illness in certain populations.
SLC11A1 variant: Changes in the SLC11A1 (also called NRAMP1) gene may weaken bacteria-clearing functions inside immune cells. Studies tie these variants to greater odds of brucellosis and long-lasting disease.
TLR pathway: Differences in Toll-like receptor genes can blunt the early alarm against Brucella. This may raise brucellosis susceptibility or delay control of the bacteria.
Cytokine variants: Inherited differences in genes that tune inflammation—such as IL10 or TNFA—can shift the immune response. Higher IL-10 activity may favor persistent or relapsing brucellosis.
Interferon pathway: Rare defects in the interleukin-12/interferon gamma pathway reduce the body's ability to kill bacteria that hide within cells. People with these conditions face higher risk of severe or recurrent brucellosis.
Chronic granulomatous disease: This inherited NADPH oxidase defect limits the ability of white blood cells to generate germ-killing bursts. It is linked to severe brucellosis and complications.
Bacterial strain genes: Genetic differences among Brucella species and strains affect how invasive and persistent they are. Infection with more virulent strains, such as some B. melitensis, is tied to more severe brucellosis.
Lifestyle risk factors
Brucellosis risk is closely tied to daily habits that involve animals and animal products. The lifestyle risk factors for Brucellosis center on what you eat, how you handle livestock or game, and hygiene during these activities. Choosing safer food and handling practices can markedly lower your odds of infection while maintaining your usual routines. Understanding how lifestyle affects Brucellosis helps you target the riskiest behaviors first.
Drinking raw milk or eating fresh, unpasteurized cheeses can transmit Brucella from infected animals. Pasteurized dairy products drastically reduce this risk.
Eating undercooked meat or organs from livestock or wild game can carry Brucella. Cooking to safe internal temperatures lowers the chance of infection.
Making cheese from raw milk at home can allow Brucella to survive in soft, fresh cheeses. Using pasteurized milk or proper heat treatment reduces risk.
Helping with calving, lambing, or handling placentas without protection increases exposure to infected fluids. Wearing gloves and masks and washing thoroughly can cut transmission.
Risk prevention
Brucellosis risk mostly comes from unpasteurized dairy, undercooked meat, or close contact with infected animals or their birth fluids, so everyday choices around food and work habits matter. Prevention is about lowering risk, not eliminating it completely. Knowing the early symptoms of brucellosis and seeking care promptly can also reduce complications. If you work with livestock, hunt, or travel to areas where brucellosis is common, a few protective steps go a long way.
Skip raw milk, soft cheeses, and ice cream made from unpasteurized dairy. Choose products labeled pasteurized to lower your brucellosis risk.
Use a thermometer and cook beef, pork, lamb, and game to safe internal temperatures. Avoid tasting meat before it’s fully cooked.
Wear gloves and a mask when handling birthing animals or aborted materials. Bag and dispose of placentas and contaminated bedding safely, and disinfect the area afterward.
If you’re a farmer, vet, or slaughterhouse worker, use gloves, eye protection, and masks to avoid splashes and aerosols. Change out of work clothes and boots before going home.
Transmission
Brucellosis spreads to people mainly from infected animals, not from other people. You can get brucellosis by drinking raw (unpasteurized) milk or soft cheeses, eating undercooked meat, or when animal blood, urine, or birth fluids and tissues get into a cut or splash into your eyes—risks that are higher for farmers, veterinarians, hunters, slaughterhouse, and laboratory workers. Breathing in contaminated dust in barns, slaughterhouses, or labs can also transmit the bacteria. Person-to-person spread is very uncommon, though rare cases have occurred through breastfeeding, sexual contact, or blood or tissue donation; in everyday settings brucellosis is not considered highly contagious, and normal casual contact does not spread it.
When to test your genes
Brucellosis is an acquired infection, so genetic testing isn’t used for diagnosis or routine care. Consider genetic testing only if you have a strong family history of unusual immune problems or repeated severe infections, as rare immune-gene issues can shape prevention and treatment. Otherwise, focus on exposure risk, prompt testing, and antibiotics.
Diagnosis
Brucellosis is often suspected when ongoing fever, sweats, and aching joints start affecting work, school, or caregiving, especially after animal exposure or unpasteurized dairy. Doctors usually begin by asking about your symptoms and recent activities, then examine you and choose targeted tests. Because early symptoms of Brucellosis can mimic the flu or other infections, how Brucellosis is diagnosed typically involves a few different steps to confirm the cause and check for complications. Some diagnoses are clear after a single visit, while others take more time.
Your team will ask about animal contact, farm or slaughterhouse work, travel, and unpasteurized dairy. This helps estimate risk and guide which tests to order.
The exam looks for fever, tender joints, and enlarged lymph nodes, liver, or spleen. These clues can point to areas that need targeted testing.
A complete blood count and liver enzyme tests look for patterns seen with infection. Results support suspicion but are not specific for Brucellosis.
Blood antibody tests can indicate a recent or ongoing Brucella infection. Rising levels on repeat testing strengthen the diagnosis of Brucellosis.
Stages of Brucellosis
Brucellosis does not have defined progression stages. The infection can start suddenly or gradually and may relapse after seeming to improve, so it doesn’t follow a predictable step-by-step pattern. Different tests may be suggested to help confirm the diagnosis, such as blood cultures and antibody blood tests, sometimes repeated over time. Doctors also look at early symptoms of brucellosis—like fever, sweats, fatigue, and joint pain—alongside exposure risks from animals or unpasteurized dairy, and may monitor recovery with follow-up exams and labs.
Outlook and prognosis
Looking ahead can feel daunting, but most people with brucellosis improve with the right antibiotics and follow-up. Many people ask, “What does this mean for my future?”, and the short answer is that recovery can take weeks to months, especially if fatigue, low-grade fevers, or joint aches linger after the infection is treated. Relapses can happen in the first few months if bacteria persist in tissues; taking the full antibiotic course and keeping appointments lowers that risk. When brucellosis settles in the spine, heart, liver, or nervous system, recovery takes longer and may require hospital care and combination antibiotics.
Doctors call this the prognosis—a medical word for likely outcomes. Most otherwise healthy adults who receive timely treatment do well and return to normal activities, though early symptoms of brucellosis like fever, night sweats, and muscle pain may come and go during recovery. Untreated disease can become chronic and cause ongoing back pain, joint inflammation, or testicular and liver problems, but modern therapy has reduced these complications. Death from brucellosis is uncommon today, and when it does occur it is usually related to endocarditis (heart valve infection) or severe complications in people with other serious health conditions.
With ongoing care, many people maintain good quality of life and work, exercise, and travel after brucellosis. Understanding the prognosis can guide planning and help you pace your return to routines—some find graded activity, hydration, and anti-inflammatory measures helpful while energy rebounds. Keep regular appointments—small adjustments can improve long-term health, including checking for relapse signs like recurrent fever or new back pain. Talk with your doctor about what your personal outlook might look like, especially if you had complications or have conditions such as diabetes, heart disease, or a weakened immune system.
Long-term effects
For many, day-to-day life improves after treatment, but some effects can linger or return. Even after early symptoms of brucellosis settle down, people may notice periods of fatigue, joint pain, or back pain that come and go. Long-term effects vary widely, and some people recover fully while others experience chronic patterns. Doctors may track these changes over years to see how symptoms evolve and respond to care.
Symptoms can return weeks to months after treatment ends. These relapses in brucellosis may be milder or feel like the original illness. Follow-up testing and re-treatment are sometimes needed.
Lasting tiredness can affect work, school, and exercise. Many describe low stamina even when fevers are gone. Sleep often helps but may not fully restore energy.
Achy or swollen joints and muscle soreness can continue. In brucellosis, hips, knees, and ankles may be affected over time. Stiffness after rest is common.
Back pain can reflect ongoing inflammation in the spine. Some develop spondylitis, which can limit bending and lifting. Rarely, nerve irritation causes leg pain or weakness.
How is it to live with Brucellosis?
Living with brucellosis can feel like riding a wave that won’t settle—days of fever, sweats (often worse at night), deep fatigue, and aching joints can flare, ease, and then return. Work, school, and routines may pause or slow down because stamina drops, concentration wavers, and pain limits activity, especially if the spine, hips, or knees are involved. With timely antibiotics and follow-up, most people gradually recover, but relapses can happen, so pacing, rest, and sticking to treatment matter. Family and coworkers may need to share tasks and be patient with the unpredictability, and those around you should avoid handling unpasteurized dairy or animal tissues to protect themselves while you focus on healing.
Treatment and drugs
Brucellosis is treated with antibiotics, usually a combination taken together to clear the bacteria and lower the chance of relapse. Doctors commonly use doxycycline with rifampin for at least 6 weeks, and may add another antibiotic like gentamicin for the first few days in more severe cases or when there are complications involving the heart, brain, or bones. Pain relievers, rest, and fluids can help ease fever, sweats, and body aches while the antibiotics do their work. Not every treatment works the same way for every person. Ask your doctor about the best starting point for you, and take all medicines exactly as prescribed to reduce the risk of the infection returning.
Non-drug treatment
Fatigue, fevers, night sweats, and sore joints can make daily tasks hard for people with brucellosis, and the recovery may take time. Alongside medicines, non-drug therapies can ease symptoms, protect joints, and help you regain strength safely. Simple steps also lower the chance of setbacks, especially when early symptoms of brucellosis have just begun to improve. Plans are tailored to age, job demands, and whether bones, joints, or the spine are involved.
Build in regular rest, especially on feverish or high-sweat days. Balance light activity with breaks to avoid post-exertion crashes. Increase activity gradually as stamina improves.
Replace fluids and salts lost with sweating by drinking water and oral rehydration drinks. Choose protein, fruits, and vegetables to support immune recovery. Smaller, frequent meals can help if appetite is low.
Warm compresses or showers can loosen stiff, achy muscles and joints. Cool packs may reduce swelling after activity. Use a cloth barrier and limit sessions to 10–15 minutes.
A therapist can guide gentle range-of-motion and strengthening work to protect sore joints and the spine. Programs are progressed slowly to prevent flare-ups. Home exercises help maintain gains between visits.
Your genes may have an impact on how drugs work for you
Even with the same diagnosis, people can process antibiotics differently because gene variants affect drug-metabolizing enzymes and transporters. These differences can change levels of drugs used for brucellosis, influencing side effects and how well treatments like doxycycline or rifampin work.
Pharmacological treatments
Antibiotics are the mainstay for brucellosis, usually taken in combinations to reduce relapse. First-line medications are those doctors usually try first, based on how well they work and their safety profile. Standard courses last at least 6 weeks, with adjustments for pregnancy, children, or complications affecting the heart, spine, or nervous system. Even when early symptoms of brucellosis fade, finishing the full course helps prevent the bacteria from returning.
Common first-line combination for uncomplicated brucellosis in adults. Taken for at least 6 weeks to lower relapse risk. Doctors monitor liver function and stomach tolerance.
Alternative first-line option when injections are feasible. Doxycycline is taken for about 6 weeks, while streptomycin is usually given for 2–3 weeks. Hearing and kidney function may be checked during treatment.
Another combination used when streptomycin is not available. Gentamicin is typically given for 7–14 days with doxycycline continued to complete at least 6 weeks. Kidney and inner ear side effects are monitored.
Option for children or adults who cannot take doxycycline. Courses typically last 6 weeks or longer, tailored to age and risk. This pair is avoided late in pregnancy unless benefits clearly outweigh risks.
Genetic influences
Brucellosis isn’t an inherited disease; it’s an infection you get from animals or unpasteurized dairy products. Family clusters usually happen because relatives share the same exposures at home, on farms, or in certain jobs, not because of shared DNA. Genetics is only one piece of the puzzle, but small differences in immune system genes may influence who becomes ill after exposure or who develops more lingering symptoms. These variations can shape the body’s inflammatory response, which might play a role in the risk of chronic or relapsing brucellosis, though any effect seems modest and not predictable for an individual. There’s no routine genetic test to predict brucellosis, and family history is not a reliable indicator of genetic risk for brucellosis. If several relatives have had brucellosis, doctors generally look for shared exposure risks and local public health patterns rather than inherited causes.
Is Brucellosis genetic?
Genetics plays a minor role in brucellosis risk compared with exposure to infected animals or unpasteurized dairy. Small genetic variations in immune pathways may influence who gets sicker or recovers slower. These differences do not replace standard prevention, diagnosis, or treatment.
Pharmacogenetics—how genetics influence drug effects
For brucellosis, treatment usually relies on combinations of antibiotics such as doxycycline with rifampin, or an aminoglycoside like gentamicin. Genetic testing can sometimes identify how your body may react to certain medicines, which can help lower the chance of side effects. A well-studied example is a change in a mitochondrial gene that greatly raises the risk of permanent hearing loss from aminoglycosides, even at standard doses; if this risk is known, doctors try to avoid these drugs and choose other regimens. Another genetic factor is G6PD deficiency: when sulfonamide antibiotics such as trimethoprim–sulfamethoxazole are used for brucellosis, people with this deficiency can develop sudden anemia due to red blood cell breakdown. For most other drugs used to treat brucellosis, inherited differences play a smaller role in dosing, but rifampin strongly affects how many other medicines are processed, so your full medication list and liver health often guide decisions. Because genetics is only one factor, age, pregnancy, kidney or liver function, past side effects, and local resistance patterns help your team tailor genetic testing for brucellosis treatment and pick the safest, most effective plan.
Interactions with other conditions
In places where tuberculosis or malaria are also common, brucellosis can be mistaken for them because early symptoms of brucellosis—fever, night sweats, and fatigue—overlap, which can delay the right care. Doctors call it a “comorbidity” when two conditions occur together, and people living with HIV, diabetes, or chronic liver disease may have more severe or prolonged brucellosis and a slower recovery. When the immune system is weakened by HIV or medicines such as steroids, brucellosis is more likely to spread beyond the usual sites and cause infection of the heart valves (endocarditis) or the spine. If someone already has damaged or artificial heart valves, brucellosis raises the risk of endocarditis, which often requires longer antibiotics and sometimes surgery. Co-infection with tuberculosis can happen, and because both diseases can affect the spine or lymph nodes in similar ways, clinicians may test for both when symptoms persist. For people with diabetes or chronic liver disease, treatment plans for brucellosis may need careful adjustments, and coordinated care across specialties can help prevent complications.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
History
Throughout history, people have described lingering fevers that came and went, night sweats that soaked bedding, and aching joints that made farm work or herding animals hard to finish. In port cities, sailors returned with weakness and headaches that seemed to last for weeks. These lived experiences mirror what we now recognize as brucellosis.
First described in the medical literature as “Malta fever” in the 19th century, the illness puzzled doctors because it could look mild one day and disabling the next. Early reports linked it to soldiers and dockworkers around the Mediterranean. From these first observations, investigators started to notice a pattern: people fell ill after contact with livestock or after drinking raw, unpasteurized milk.
Over time, descriptions became more precise. In the late 1800s and early 1900s, scientists isolated the bacteria responsible and connected different animal reservoirs—goats, sheep, cattle, and pigs—to human infection. The condition picked up several names tied to its source animals and locations, but the core story stayed the same: a slow-burn infection that could relapse if not fully treated.
As medical science evolved, public health efforts changed the landscape of brucellosis in many regions. Pasteurization of milk, safer animal birthing practices, and vaccination of herds lowered the risk in large parts of Europe and North America. Still, in areas where people rely on fresh, unpasteurized dairy or close daily contact with livestock, brucellosis remains a concern. Travelers and people working with animals continue to be the ones most often affected.
Not every early description was complete, yet together they built the foundation of today’s knowledge. Clinicians learned that the bacteria can settle in different parts of the body, which explains the wide range of symptoms and why some people develop joint, back, or reproductive complications. This also clarified why some cases seemed to “come back” after a period of feeling better.
In recent decades, knowledge has built on a long tradition of observation. Better blood tests and culture techniques made diagnosis more reliable, and antibiotic combinations reduced relapses when taken as prescribed for the full course. Veterinary control programs showed how managing the disease in animals protects human health, a lesson that continues to guide prevention today.
Knowing the condition’s history helps explain current advice: avoid unpasteurized dairy, use protective measures when assisting animal births, and seek timely medical care if prolonged fever and sweats follow livestock exposure or travel to affected regions. The journey from “Mediterranean fever” to modern brucellosis care reflects steady progress—step by step, observation by observation—toward safer food systems and more effective treatment.