A23.8 Other brucellosis

Name of the Condition

• Other brucellosis

Summary

Other brucellosis refers to bacterial infections caused by Brucella species other than Brucella melitensis or Brucella abortus. These infections can affect multiple organ systems and are characterized by fever, fatigue, and musculoskeletal symptoms. Transmission typically occurs through contact with infected animals or consumption of contaminated animal products.

Causes

Other brucellosis is caused by Brucella bacteria, such as Brucella suis (associated with pigs) or Brucella canis (associated with dogs). The bacteria are primarily transmitted to humans through direct contact with infected animals or consumption of unpasteurized dairy products from these animals. Entry into the body occurs via 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 non-melitensis or non-abortus Brucella species are 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. Imaging may be used to assess organ involvement.

Treatment Options

Treatment typically involves a combination of antibiotics, such as doxycycline and rifampin, for several weeks. The specific regimen may vary based on the Brucella species and severity of infection. Supportive care, including rest and pain management, may also be recommended.

Prognosis and Follow-Up

With appropriate treatment, most patients recover fully, though some may experience prolonged fatigue or joint pain. Follow-up appointments are important to monitor for recurrence or complications. Antibiotic therapy should be completed as prescribed to prevent relapse.

Complications

Untreated or inadequately treated infections can lead to complications such as endocarditis, osteomyelitis, or neurological involvement. Chronic infection may result in persistent symptoms like fatigue or joint pain.

Lifestyle & Prevention

• Avoid consuming unpasteurized dairy products.
• Use protective gear when handling animals or animal products.
• Practice good hygiene, especially after contact with animals.
• Travelers to endemic regions should avoid raw or undercooked meat and unpasteurized dairy.

When to Seek Professional Help

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

Tips for Medical Coders

Document the specific Brucella species (if known) and any associated complications to support accurate coding. Ensure clinical documentation aligns with the diagnosis of "other brucellosis" (A23.8) and includes details on transmission, symptoms, and treatment for clarity.