Dawaa Reference

chronic

Lymphatic Filariasis (Elephantiasis)

Treatment options, dosing, cautions and Egyptian brands from the shipped Dawaa Reference card.

Evidence status

Checked against the sources named below

Sources3 sources

Bancroftian Filariasis(Archived) - StatPearls - NCBI Bookshelf - https://www.ncbi.nlm.nih.gov/books/NBK547682/ · ICPC-3 (WONCA International Classification of Primary Care, 3rd edition) class AD24.08 - condition scope only, no dose · Egyptian National Drug Formulary - Antimicrobial 2023 (diethylcarbamazine monograph, p28)

Verified against2 documents
  • Lymphatic Filariasis (Elephantiasis) - disease-level clinical article (lymphatic-filariasis-clinical.txt)
  • Egyptian National Drug Formulary - Antimicrobial 2023 (diethylcarbamazine monograph, p28)

Verified date2026-08

Presentation reference

Is it this?

Reference only, to read alongside your own examination.

Symptoms — what the patient reports (9)

  • Acute adenolymphangitis brings repeated sudden bouts of painful groin lymph node swelling with inflamed testis, spermatic cord, and epididymis [lymphadenopathy]
  • Patients can have 1 to 4 episodes a year, each resolving after 4 to 7 days
  • Filarial fever is fever occurring without associated lymph node inflammation [fever]
  • Tropical pulmonary eosinophilia causes dry, nocturnal cough, wheeze, and breathlessness [breathlessness · cough · wheeze]
  • Acute dermatolymphangioadenitis presents with painful inflamed skin plaques, fever, chills, and headache [chills · fever · headache · plaques · redness]
  • Calabar swellings are transient non-red skin swellings, usually on the face or limbs, that resolve in 2 to 4 days
  • Patients may report a sensation of a worm migrating across the eye, which lasts 10 to 20 minutes
  • It is usually caught in childhood and stays silent for years while quietly damaging the lymphatic system and the kidneys and weakening immunity
  • Years of repeated inflammation end in chronic lymphoedema and elephantiasis, with permanent oedema of the limbs, the breasts, the vulva and the scrotum [oedema]

Signs — what you find (3)

  • Chronic lymphedema progresses from pitting edema to firm, non-pitting swelling with thickened, darkened skin [leg swelling]
  • Unilateral or bilateral hydrocele is a common chronic finding, most often from W. bancrofti infection
  • Subcutaneous dirofilariasis presents as a tender, red nodule near the eye, groin, or a limb, sometimes with an abscess [abscess]

Tests (6)

  • Eosinophil counts often exceed 3000/µL, along with raised IgE, proteinuria, and hematuria
  • Newer rapid IgG4 antibody tests use recombinant antigens and are more sensitive than older crude-antigen serology
  • Circulating filarial antigen testing can give false positives for W. bancrofti when L. loa microfilaria levels are high
  • Blood for smear should be drawn between 10 pm and 2 am for Bancroftian and Brugian filariasis because of nocturnal periodicity
  • A worm needs 9 to 15 months to mature enough to shed detectable microfilariae, so skin snips can miss early infection
  • Ultrasound can show live adult worms moving inside lymphatic vessels, the filarial dance sign

If not this — what else fits (5)

  • Leprosy is a differential diagnosis for lymphatic filariasis
  • Lymphoma is a differential diagnosis for lymphatic filariasis
  • Podoconiosis
  • Primary lymphedema
  • Testicular malignancy

SourceStatPearls "Filariasis" - disease-level clinical article

Presentation findings are traced to the source above.

Rx: Antiparasitic | Main treatment

ANTIPARASITIC

1

DIETHYLCARBAMAZINE

Antiparasitic

1st line

Strength100 mg

Formoral.solid

Adult dose and duration

6 mg/kg/day, as a single dose or in 3 divided doses x 1 or 12 days; 14 to 21 days where there is tropical pulmonary eosinophilia

Paediatric dose

6 mg/kg/day

(6 mg/kg/day, given as one dose or split into three, for 1 or 12 days; 14 to 21 days where there is tropical pulmonary eosinophilia.)

Dose by weight
3kg18 mg/day
4kg24 mg/day
5kg30 mg/day
6kg36 mg/day
7kg42 mg/day
8kg48 mg/day
9kg54 mg/day
10kg60 mg/day
11kg66 mg/day
12kg72 mg/day
13kg78 mg/day
14kg84 mg/day
15kg90 mg/day
16kg96 mg/day
17kg102 mg/day
18kg108 mg/day
19kg114 mg/day
20kg120 mg/day
21kg126 mg/day
22kg132 mg/day
23kg138 mg/day
24kg144 mg/day
25kg150 mg/day
26kg156 mg/day
27kg162 mg/day
28kg168 mg/day
29kg174 mg/day
30kg180 mg/day
31kg186 mg/day
32kg192 mg/day
33kg198 mg/day
34kg204 mg/day
35kg210 mg/day
36kg216 mg/day
37kg222 mg/day
38kg228 mg/day
39kg234 mg/day
40kg240 mg/day
41kg246 mg/day
42kg252 mg/day
43kg258 mg/day
44kg264 mg/day
45kg270 mg/day
46kg276 mg/day
47kg282 mg/day
48kg288 mg/day
49kg294 mg/day
50kg300 mg/day
Dose source

Egyptian National Drug Formulary - Antimicrobial 2023 (diethylcarbamazine monograph, p28)

Why

The formulary names treatment of lymphatic filariasis as an indication for diethylcarbamazine and gives 6 mg/kg/day for it - a different and lower regimen from the 8-10 mg/kg/day it gives for loiasis, which is why the two cards do not carry the same row. The cited article says every patient should be treated even when free of symptoms, because early treatment may reverse the lymphatic damage.

Cautions
  • TEST FOR CO-INFECTION FIRST. The cited article is explicit: anyone from a region where onchocerciasis or loiasis is endemic must be checked before this drug is started. Diethylcarbamazine triggers a severe inflammatory reaction in onchocerciasis, and both it and ivermectin can cause a fatal encephalopathy in loiasis.
  • CONTRAINDICATED IN ONCHOCERCIASIS - the formulary's only listed contraindication.
  • WHERE MICROFILARIAE ARE IN THE BLOOD the formulary offers a dose-escalating start: 50 mg once on day 1; 50 mg three times on day 2; 100 mg three times on day 3; then 6 mg/kg/day in 3 divided doses from day 4.
  • Treating the worm does not undo established lymphoedema. Limb hygiene, skin care and management of the swelling continue regardless.
Egyptian brands

No Egyptian brand matched — prescribe by generic name.

MAIN TREATMENT

2

REFERRAL & SAFETY-NETTING (NO DRUG THERAPY)

1st line
Adult dose and duration

Wuchereria bancrofti infection causing lymphoedema/elephantiasis and hydrocele. Historically endemic in Nile Delta governorates, but Egypt reached WHO elimination status in 2013, so new transmission is very unlikely. A GP today mainly manages chronic lymphoedema (hygiene, compression) and treats acute adenolymphangitis attacks, referring for confirmation rather than prescribing antifilarial drugs directly. - Refer, with advice

Paediatric dose

Children follow the same pathway: recognise and refer. No primary-care medicine is implied.

Dose source

No dose - referral pathway, no medicine given in primary care

Why

Wuchereria bancrofti infection causing lymphoedema/elephantiasis and hydrocele. Historically endemic in Nile Delta governorates, but Egypt reached WHO elimination status in 2013, so new transmission is very unlikely. A GP today mainly manages chronic lymphoedema (hygiene, compression) and treats acute adenolymphangitis attacks, referring for confirmation rather than prescribing antifilarial drugs directly.

Cautions
  • Rare in Egyptian primary care.
  • The drug rows above are what the treating service gives. They are here so that the referral is an informed one and so the GP can recognise the regimen the patient comes back on - not as permission to start it without the referral.
  • RED FLAG - Before starting treatment, test patients from endemic regions for onchocerciasis or loiasis coinfection because DEC can cause severe inflammatory reactions in onchocerciasis and DEC or ivermectin can cause fatal encephalopathy in loiasis.
  • RED FLAG - Fever with painful ascending lymphangitis (an acute attack) is treated as bacterial superinfection, and progressive limb or scrotal swelling needs referral to rule out other causes (malignancy, venous disease) as well as filariasis.

Prices are indicative (dataset snapshot 2026-06); verify with the pharmacy.