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Symbiosis

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...

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Updated: Jul 4, 2025

Detection of Extravascular Trypanosoma Parasites by Fine Needle Aspiration

Detection of Extravascular Trypanosoma Parasites by Fine Needle Aspiration

Published on: August 7, 2019

Extralymphatic Filariasis.

Padmapriya Srinivasan¹, Rahul Ray¹, Sridhar Jandhyala¹

¹Department of Dermatology, Institute of Naval Medicine (INHS Asvini), Mumbai, Maharashtra, India.

Indian Dermatology Online Journal

|January 29, 2024

Summary

This summary is machine-generated.

Filariasis, a nematode infection, can cause rare extralymphatic swelling. Early diagnosis of atypical presentations like facial swelling is crucial for effective treatment.

Keywords:

Extralymphatic filariasis filarial dance sign subcutaneous filariasis

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Area of Science:

Medical Parasitology
Tropical Medicine
Diagnostic Imaging

Background:

Filariasis commonly affects lymphatic vessels, leading to lymphedema and lymphadenitis.
Extralymphatic filariasis, though rare, can manifest in unusual locations such as skin and soft tissues.
Wuchereria bancrofti is a primary nematode responsible for extralymphatic filariasis.

Observation:

A case of a 25-year-old male presented with a live, extralymphatic filarial infestation.
The infestation manifested as a subcutaneous soft-tissue swelling on the face.
Ultrasonography confirmed the condition and revealed the characteristic 'filarial dance sign'.

Findings:

The case highlights a rare presentation of filariasis in facial subcutaneous tissue.
Ultrasonography proved effective in diagnosing the extralymphatic filarial infestation.
The 'filarial dance sign' on USG is indicative of live filarial parasites.

Implications:

Awareness of atypical filariasis presentations is vital for clinicians.
Prompt diagnosis of extralymphatic filariasis can lead to timely and appropriate treatment.
This case underscores the importance of considering parasitic infections in unexplained soft-tissue swellings.