Microscopic pathogens attacking human immune system. Symbolizing challenges diagnosing and treating rare infections.

When Rare Diseases Collide: A Lupus Patient's Unforeseen Journey

"Discover how a systemic lupus erythematosus (SLE) patient's compromised immune system led to a rare zoonotic infection and subsequent pneumonia, highlighting the challenges of diagnosis and treatment."


Systemic lupus erythematosus (SLE) is an autoimmune disease that weakens the immune system, making patients more vulnerable to opportunistic infections. While doctors are familiar with common infections in SLE, rare cases can present diagnostic and treatment challenges. This article explores one such case, shedding light on the importance of recognizing unusual infections in immunocompromised individuals.

We delve into the case of a 21-year-old woman newly diagnosed with SLE who developed a rare zoonosis, hemotrophic mycoplasma infection. This was further complicated by Nocardia asteroides pneumonia. This case underscores the delicate balance of managing SLE with immunosuppressive therapies, while remaining vigilant for opportunistic infections.

This case not only emphasizes diagnostic and therapeutic hurdles but also provides insights into the interconnectedness of immune dysregulation, rare infections, and the importance of personalized treatment approaches in autoimmune diseases. It highlights the need for continuous monitoring and a proactive approach to potential complications.

The Unfolding of a Rare Case: From Initial Symptoms to Diagnosis

Microscopic pathogens attacking human immune system. Symbolizing challenges diagnosing and treating rare infections.

The patient, a 21-year-old woman working as a hairdresser in a rural environment with regular contact with animals, initially presented with common symptoms such as painful, swollen fingers and ankles, and morning stiffness. These symptoms, lasting for about a year, were followed by an upper respiratory tract infection and high fever, leading to initial treatment with penicillin.

When her condition worsened despite initial treatment, she was hospitalized and found to have cervical, axillary, and inguinal lymphadenopathy, mild hepatosplenomegaly, and a heart murmur. Laboratory tests revealed pancytopenia, a deficiency of all three blood cell types. A bone marrow aspiration showed hypoplasia, indicating reduced production of blood cells. Due to persistent fever, she was transferred to the Infectious Diseases Unit with a diagnosis of fever of unknown origin (FUO) and pancytopenia.

  • Initial Symptoms: Joint pain, swelling, morning stiffness.
  • Progression: Upper respiratory infection, high fever.
  • Hospitalization Findings: Lymphadenopathy, hepatosplenomegaly, heart murmur.
  • Laboratory Results: Pancytopenia, bone marrow hypoplasia.
Further investigations revealed the presence of cocci on the surface of red blood cells in a peripheral blood smear. Consulting with veterinarians, doctors identified the cocci as hemotrophic mycoplasma, leading to a diagnosis of hemoplasmosis. Immunological blood tests also indicated a possible systemic disease, leading to her admission to the Rheumatology Unit.

Lessons Learned and the Importance of Vigilant Care

This case highlights the diagnostic and therapeutic challenges in managing SLE patients who develop rare infections. The relapse of hemoplasmosis coincided with the introduction of systemic glucocorticoids, indicating the fine balance between immunosuppression and infection risk.

The subsequent development of Nocardia asteroides pneumonia underscores the importance of vigilant monitoring for opportunistic infections in immunocompromised patients. Quick diagnostic procedures and early empirical therapy are essential for clinical management.

While this case is unique, it reinforces the need for clinicians to consider rare and unusual infections in SLE patients, especially when common treatments fail. A multidisciplinary approach, involving infectious disease specialists, rheumatologists, and veterinarians, can be invaluable in diagnosing and managing such complex cases. Further research is needed to understand the interplay between autoimmune diseases and rare infections to improve patient outcomes.

About this Article -

This article was crafted using a human-AI hybrid and collaborative approach. AI assisted our team with initial drafting, research insights, identifying key questions, and image generation. Our human editors guided topic selection, defined the angle, structured the content, ensured factual accuracy and relevance, refined the tone, and conducted thorough editing to deliver helpful, high-quality information.See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1590/s1413-86702010000100019, Alternate LINK

Title: Rare Zoonosis (Hemotrophic Mycoplasma Infection) In A Newly Diagnosed Systemic Lupus Erythematosus Patient Followed By A Nocardia Asteroides Pneumonia

Subject: Infectious Diseases

Journal: Brazilian Journal of Infectious Diseases

Publisher: FapUNIFESP (SciELO)

Authors: Dubravka Bosnic, Marko Baresic, Branimir Anic, Mirna Sentic, Mislav Cerovec, Miroslav Mayer, Nada Cikes

Published: 2010-02-01

Everything You Need To Know

1

How does systemic lupus erythematosus (SLE) increase the risk of rare infections?

Systemic lupus erythematosus (SLE) is an autoimmune condition that weakens the immune system. This weakening makes individuals more susceptible to opportunistic infections. While common infections are well-recognized in SLE patients, rare cases, such as hemotrophic mycoplasma infection and Nocardia asteroides pneumonia, can present significant diagnostic and treatment challenges because they are not as readily considered. This necessitates vigilance and a broad diagnostic approach.

2

What is hemotrophic mycoplasma infection, and how did the patient's lifestyle contribute to contracting it?

Hemotrophic mycoplasma infection is a rare zoonotic infection, meaning it is transmitted from animals to humans. In the case described, the patient's regular contact with animals in a rural environment likely contributed to her contracting this infection. Diagnosis involved identifying cocci on the surface of red blood cells in a peripheral blood smear, requiring consultation with veterinarians to confirm the specific pathogen. The significance lies in recognizing such unusual infections in immunocompromised individuals, as delayed diagnosis can lead to severe complications.

3

What is Nocardia asteroides pneumonia, and why is it a concern for individuals with SLE?

Nocardia asteroides pneumonia is an opportunistic lung infection caused by the bacteria Nocardia asteroides. It can occur in individuals with weakened immune systems, such as those with SLE undergoing immunosuppressive treatment. Diagnosing Nocardia pneumonia typically involves identifying the bacteria in respiratory samples. Effective treatment usually requires prolonged antibiotic therapy tailored to the specific Nocardia species, highlighting the need for precise diagnostics and targeted antimicrobial strategies.

4

What is pancytopenia, and how does it relate to SLE and opportunistic infections?

Pancytopenia refers to a deficiency in all three types of blood cells: red blood cells, white blood cells, and platelets. In the context of this case, pancytopenia was identified through laboratory tests and further investigated with a bone marrow aspiration, which revealed hypoplasia (reduced production of blood cells). Pancytopenia in SLE patients can result from the disease itself, immunosuppressive medications, or infections. Managing pancytopenia involves identifying and addressing the underlying cause, which may include adjusting medications or treating infections, and may require supportive care such as blood transfusions.

5

Why is there a risk of infection when using systemic glucocorticoids to treat systemic lupus erythematosus (SLE)?

Systemic glucocorticoids are immunosuppressive medications commonly used in managing SLE to reduce inflammation and control the autoimmune response. However, these medications also increase the risk of opportunistic infections by further weakening the immune system. In this case, the relapse of hemoplasmosis coincided with the introduction of systemic glucocorticoids, illustrating the delicate balance between immunosuppression and infection risk. Careful monitoring and tailored treatment strategies are crucial to minimize the risk of infections while effectively managing SLE symptoms. This balance often requires personalized approaches and continuous evaluation of the patient's condition.

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