Elephantiasis
- Pronunciation
- /el-eh-fan-TY-uh-sis/
- Category
- Disease Ecology
- Singular
- elephantiasis
Definition
Severe, chronic lymphedema characterized by massive enlargement and fibrotic thickening of limbs, genitalia, or other body regions due to lymphatic vessel obstruction. In medical entomology, the term specifically denotes the disfiguring end-stage of lymphatic caused by filarial (primarily *Wuchereria bancrofti*, *Brugia malayi*, and *B. timori*) transmitted by mosquito . The condition results from repeated inflammatory episodes triggered by worm presence in lymphatic vessels, leading to irreversible tissue , fibrosis, and secondary bacterial . While 'elephantiasis' is sometimes applied loosely to any gross lymphatic edema, reserve it for filarial ; non-parasitic lymphedema is termed 'elephantiasis nostras' or primary lymphedema.
Etymology
From Greek *elephantos* (elephant) + *-iasis* (condition), describing the elephantine appearance of affected limbs.
Example
In regions of sub-Saharan Africa, *Culex quinquefasciatus* transmits *Wuchereria bancrofti*; repeated bites over years can lead to elephantiasis of the lower extremities, with limb circumference exceeding 60 cm and characteristic mossy, verrucous skin changes.
Synonyms
- lymphatic filariasis (causal disease, not synonym)
- elephantiasis tropica
Related Terms
- lymphatic filariasis
- Wuchereria bancrofti
- Brugia malayi
- Culex
- vector-borne disease
- microfilariae
- chyluria
- hydrocele
- tropical pulmonary eosinophilia
- mass drug administration
- diethylcarbamazine
- ivermectin
Usage Notes
Distinguish between elephantiasis (the clinical ) and lymphatic (the parasitic ). Not all filariasis progresses to elephantiasis; asymptomatic microfilaremia and acute adenolymphangitis are alternative presentations. The term is frequently misspelled 'elephantitis' (inflammation of an elephant), which is etymologically and clinically incorrect. In arachnology, 'elephantiasis' appears as a epithet in tarantulas (*Hysterocrates elephantiasis*, *Phoneyusa elephantiasis*), but this denotes taxonomic description, not the medical condition.