Assertion: trachoma | /r/HasProperty | west
Facets:
Source sentences:
text: In addition to age and sex, environmental factors such as household proximity to water source, poor hygienic conditions, presence and density of eye-seeking flies, availability of functional latrine, presence of cattle pens and cattle ownership, crowded living conditions in the family unit, and nutritional deficiencies (vitamin A) have been identified as possible risk factors for trachoma (West 2004).