A23 Brucellosis

Name of the Condition

• Brucellosis

Summary

Brucellosis is a bacterial infection caused by Brucella species, which can affect multiple organ systems. The condition is characterized by fever, fatigue, and musculoskeletal symptoms, and it is often transmitted through contact with infected animals or consumption of contaminated animal products.

Causes

Brucellosis is caused by Brucella bacteria, which are primarily transmitted to humans through direct contact with infected animals (e.g., livestock) or consumption of unpasteurized dairy products from infected animals. The bacteria can enter the body through broken skin, mucous membranes, or ingestion.

Risk Factors

• Occupational exposure to livestock or animal products (e.g., farmers, veterinarians).
• Consumption of unpasteurized milk or cheese.
• Travel to regions where brucellosis is endemic.
• Handling of infected animal tissues or fluids without proper protection.

Symptoms

• Intermittent or undulating fever.
• Profuse sweating, especially at night.
• Fatigue and weakness.
• Joint and muscle pain (arthralgia/myalgia).
• Headache.
• Loss of appetite and weight.
• Hepatomegaly or splenomegaly in some cases.

Diagnosis

Diagnosis is based on clinical presentation, exposure history, and laboratory testing. Blood or bone marrow cultures may identify Brucella species, while serologic tests (e.g., agglutination assays) can detect antibodies. PCR testing may also be used for confirmation.

Treatment Options

• Antibiotics: A combination of doxycycline and rifampin is commonly used for 6 weeks. Alternative regimens include trimethoprim-sulfamethoxazole with rifampin.
• Supportive care: Rest and symptom management (e.g., analgesics for pain) may be recommended.
• Monitoring: Follow-up to ensure resolution of symptoms and prevent relapse.

Prognosis and Follow-Up

With appropriate treatment, most patients recover fully, though relapses can occur. Follow-up appointments are important to monitor for recurrence or complications. Chronic infection may require extended antibiotic therapy.

Complications

• Endocarditis (infection of the heart valves).
• Meningitis or encephalitis (rare).
• Osteoarticular involvement (e.g., spondylitis).
• Hepatitis or splenic abscesses.
• Neurobrucellosis (nervous system involvement).

Lifestyle & Prevention

• Avoid consuming unpasteurized dairy products.
• Use protective gear (e.g., gloves, masks) when handling animals or animal products.
• Practice good hygiene, especially after contact with livestock.
• Ensure proper pasteurization of milk and dairy products.

When to Seek Professional Help

Seek medical attention if you experience persistent fever, unexplained fatigue, or musculoskeletal pain after potential exposure to infected animals or contaminated products. Early diagnosis improves outcomes.

Tips for Medical Coders

Document the specific Brucella species (if identified) and any associated complications (e.g., endocarditis, osteomyelitis) to support accurate coding. Include details of exposure history or diagnostic test results when available.