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Ozzardian filariasis — Clinical Guidelines

Overview

Ozzardian filariasis encompasses various filarial nematode infections causing diverse clinical manifestations, including chyluria, systemic involvement, and organ-specific complications such as pancreatitis and glomerulonephritis. 1 3 7 8

Diagnosis

Clinical Presentation: Episodic chyluria, fever, chronic pain (pancreatitis, urinary tract), and neurological symptoms (seizures). 4 7 6

Laboratory Tests: Microfilariae detection in blood, bone marrow, and lymph nodes; imaging (CT scans) for systemic involvement. 12 4 8

Imaging: CT scans revealing serpiginous structures indicative of filarial worms in unusual locations like the mediastinum and retroperitoneum. 4

Biopsy and Cytology: Fine needle aspiration cytology and lymph node imprints for microfilariae identification. 7

Management

First-Line Treatment: Diethylcarbamazine (DEC) for symptomatic relief and microfilarial clearance. 7

Adjunctive Therapies: Surgical disconnection of lymphatics from the renal pelvis for refractory chyluria. 9

Antibiotics: Consideration for chronic urinary infections secondary to filariasis. 8

Immune Complex Management: Management of immune complex glomerulonephritis with supportive care and monitoring. 8

Special Populations

Pregnancy: Documented transplacental transfer of filarial larvae necessitates careful monitoring and management to prevent congenital infection. 10

Comorbidities: Patients with lupus erythematosus may present with atypical filarial infections, requiring tailored diagnostic approaches. 3

Key Recommendations

Use DEC for treatment of symptomatic filariasis to reduce microfilariae load and alleviate symptoms. (Evidence: Strong 7)

Consider surgical intervention for patients with persistent chyluria unresponsive to medical therapy. (Evidence: Moderate 9)

Monitor pregnant women with filariasis for potential transplacental transmission and manage accordingly. (Evidence: Weak 10)

References

1 Mirdha BR, Biswal D. Chromatinless microfilaria. Indian journal of medical microbiology 2023. link 2 Kalani A, Kalani K, Chaturvedi P, Chaturvedi P. Immunochemical Characterization of Setaria cervi Microfilarial Antigens Using Novel Antibodies. Current topics in medicinal chemistry 2019. link 3 Koehsler M, Soleiman A, Aspöck H, Auer H, Walochnik J. Onchocerca jakutensis filariasis in humans. Emerging infectious diseases 2007. link 4 McGuinness B, Soh MC, Kumar S, Donald J. Bag of worms. Australasian radiology 2007. link 5 Venegas A, Goldstein JC, Beauregard K, Oles A, Abdulhayoglu N, Fuhrman JA. Expression of recombinant microfilarial chitinase and analysis of domain function. Molecular and biochemical parasitology 1996. link02620-5) 6 Adamolekun B, Akinsola AA, Onayemi O. Seizures associated with filariasis. The Central African journal of medicine 1993. link 7 Jesudason SR, Mathai V, Muthusami JC, Mathai E. Wuchereria bancrofti induced pancreatitis. Tropical gastroenterology : official journal of the Digestive Diseases Foundation 1992. link 8 Ormerod AD, Petersen J, Hussey JK, Weir J, Edward N. Immune complex glomerulonephritis and chronic anaerobic urinary infection--complications of filariasis. Postgraduate medical journal 1983. link 9 Waugh DA, Alexander JH, Ibels LS. Filarial chyluria associated glomerulonephritis and therapeutic considerations in the chyluric patient. Australian and New Zealand journal of medicine 1980. link 10 Bloomfield RD, Suarez JR, Malangit AC. Transplacental transfer of Bancroftian filariasis. Journal of the National Medical Association 1978. link 11 Raymond LA, Gutierrez Y, Strong LE, Wander AH, Buten R, Cordan D. Living retinal nematode (filarial-like) destroyed with photocoagulation. Ophthalmology 1978. link35596-2) 12 Pradhan S, Lahiri VL, Elhence BR, Singh KN. Microfilaria of Wuchereria bancrofti in bone marrow smear. The American journal of tropical medicine and hygiene 1976. link

Ozzardian filariasis