Balamuthia

Genus of free-living amoebae

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Balamuthia
Kingdom:
Phylum:	Cercozoa
Class:	Heterolobosea
Order:	Schizopyrenida
Family:	Vahlkampfiidae

Balamuthia is a genus of free-living amoebae within the family Vahlkampfiidae. It is known to cause a rare but serious infection called granulomatous amoebic encephalitis (GAE). The genus was first described in 1993 after being isolated from the brain of a mandrill that had died of encephalitis.

Characteristics

Balamuthia amoebae are typically found in soil and water. They are known for their ability to infect humans and animals, leading to severe central nervous system infections. The amoebae can enter the body through the lower respiratory tract or through open wounds, eventually reaching the brain.

Life Cycle

The life cycle of Balamuthia includes both a trophozoite stage and a cyst stage. The trophozoite is the active, feeding stage, while the cyst is the dormant, resistant stage. Both stages are capable of causing infection.

Pathogenicity

Balamuthia mandrillaris is the species most commonly associated with human infections. It causes granulomatous amoebic encephalitis, a condition that is often fatal. Symptoms of GAE include headache, fever, stiff neck, nausea, vomiting, and neurological deficits. Diagnosis is typically made through brain imaging and biopsy, and treatment often involves a combination of antimicrobial drugs.

Diagnosis and Treatment

Diagnosis of Balamuthia infection is challenging due to its rarity and the non-specific nature of its symptoms. It often requires a combination of imaging studies, laboratory tests, and histopathological examination. Treatment is also difficult and usually involves a combination of antimicrobial agents, although the prognosis remains poor.

Prevention

Preventive measures include avoiding contact with contaminated soil and water, especially for individuals with compromised immune systems. Proper wound care and hygiene are also important to reduce the risk of infection.

Related Pages

• Amoeba
• Granulomatous amoebic encephalitis
• Free-living amoebae
• Vahlkampfiidae
• Mandrill