B60.09 Other babesiosis

Name of the Condition

• Other babesiosis

Summary

Other babesiosis refers to babesiosis infections caused by Babesia species other than Babesia microti. This condition is an infectious disease that affects red blood cells and is transmitted primarily through the bite of infected ticks. It may also be acquired through blood transfusions or from an infected mother to her fetus.

Causes

The condition is caused by infection with Babesia parasites other than Babesia microti. Transmission occurs mainly through the bite of infected Ixodes ticks, though rare cases have been linked to blood transfusions or perinatal exposure.

Risk Factors

• Residence in or travel to regions where non-Babesia microti Babesia species are endemic.
• Outdoor activities in tick-infested areas.
• Weakened immune system, including conditions like splenectomy or immunosuppressive therapy.
• Blood transfusion from an infected donor (rare).

Symptoms

• Fever and chills
• Fatigue and malaise
• Muscle and joint aches
• Headache
• Hemolytic anemia (destruction of red blood cells)

Diagnosis

Diagnosis is confirmed through blood smear microscopy to identify Babesia parasites in red blood cells, polymerase chain reaction (PCR) tests to detect Babesia DNA, and serologic tests to detect Babesia antibodies. Additional testing may be required to differentiate from other Babesia species.

Treatment Options

• Atovaquone plus azithromycin: First-line treatment for most cases.
• Clindamycin plus quinine: Alternative for severe or refractory infections.
• Exchange transfusion: Considered in cases of high parasitemia or organ failure.

Prognosis and Follow-Up

Prognosis varies depending on the patient’s immune status and severity of infection. Most immunocompetent individuals recover fully with treatment. Immunocompromised patients may experience prolonged or severe illness. Follow-up includes monitoring for resolution of symptoms and repeat blood tests if necessary.

Complications

• Severe hemolytic anemia
• Acute respiratory distress syndrome (ARDS)
• Multiorgan failure
• Recurrent infection in immunocompromised individuals

Lifestyle & Prevention

• Avoid tick-infested areas, especially during peak season.
• Use insect repellent and wear protective clothing when outdoors.
• Perform thorough tick checks after outdoor activities.
• Consider prophylactic treatment for high-risk exposures in endemic areas.

When to Seek Professional Help

Seek medical attention if you experience fever, chills, or fatigue after potential tick exposure or if symptoms worsen. Prompt evaluation is critical for immunocompromised individuals or those with severe symptoms.

Tips for Medical Coders

Document the specific Babesia species (if identified) and note the mode of transmission (tick bite, transfusion, or perinatal). Ensure clinical documentation supports the diagnosis and any associated complications. Use this code for babesiosis caused by Babesia species other than Babesia microti.