raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2404

Loiasis

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
All ages
Status
active

Loiasis is a form of filariasis, caused by the parasitic worm <i>Loa loa</i>, endemic to the forest and savannah regions of Central and Western Africa. Loiasis may either be asymptomatic or manifest as a large, transient area of localized, non-erythematous subcutaneous edema (Calabar swellings), adult worm migration through the sub-conjunctiva (''African eye worm'') and pruritus. Generalized itching, hives, muscle pains, arthralgias, fatigue, and adult worms visibly migrating under the surface of the skin may be observed. Severe complications such as encephalopathy have been reported in highly infected individuals receiving ivermectin during mass drug administration programs for the control of onchocerciasis and lymphatic filariasis.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLoiasis
frLoaseFilariose à loa-loa · Loaose
deLoiasisAfrikanischer Augenwurm
esLoasis
itLoiasi
nlLoiasis
ptLoiasiose
plLoaoza
csLoaiázaLoalóza · Loaóza
ukЛоіазіс
zh罗阿丝虫病
trLoiasis

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10B74.3Especificvalidated
ICD-111F66.0Especificvalidated
MONDO0016566Evalidated
MeSHD008118Evalidated
UMLSC0023968Evalidated
GARD3283Evalidated
MedDRA10024797Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—EuropeClass onlyValidated22784545[PMID]
Point prevalence>1 / 1000—Specific populationClass onlyNot yet validatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card