[Disseminated microspiridiosis (Encephalitozoon intestinalis) in a patient with HIV infection]

U Lippert1, J Schottelius, C Manegold

  • 1Klinische Abteilung (Chefarzt Prof. Dr. G. Burchard).

Abstract

Insights

Microsporidia, a type of opportunistic infection, can cause serious illness in patients with advanced HIV. Early diagnosis and treatment with albendazole are effective in managing microsporidial infections.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Immunology

Background:

  • Opportunistic infections are common in patients with advanced HIV.
  • AIDS-related cholangitis presents diagnostic challenges.
  • Microsporidia are emerging pathogens in immunocompromised individuals.

Observation:

  • A 39-year-old patient with advanced HIV presented with chronic diarrhea, abdominal pain, and pansinusitis.
  • Initial investigations including ultrasound and cholangiography revealed cholangitis, but routine stool and coloscopy were unremarkable.
  • Microsporidia (Encephalitozoon) were definitively diagnosed via electron microscopy and PCR in bile duct, nasal, and stool samples.

Findings:

  • Albendazole treatment led to successful resolution of cholangitis and normalization of liver tests.
  • Post-treatment samples were negative for microsporidia by multiple diagnostic methods.
  • This case highlights the systemic potential of microsporidial infections.

Implications:

  • Microsporidia should be considered in the differential diagnosis of immunocompromised patients with unexplained symptoms, particularly cholangitis.
  • Accurate diagnosis requires specialized techniques like electron microscopy and PCR.
  • Prompt treatment with albendazole can effectively manage microsporidial infections in AIDS patients.

Related Concept Videos

Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
Toxoplasmosis01:28

Toxoplasmosis

Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...
Giardiasis01:12

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...
Amebiasis01:28

Amebiasis

Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...