noun
Sparganum proliferum (species of worm)
A rare parasitic tapeworm larva that can proliferate in human tissue. Primarily a medical/biological term.
芽殖孤虫はヒトに感染すると重篤な症状を引き起こすことがある。
Sparganum proliferum can cause severe symptoms when it infects humans.
The name is composed of 芽殖 (budding/proliferation) + 孤虫 (sparganum, a larval stage of certain tapeworms). The exact derivation is uncertain; it is a technical term for this specific organism.