To the Editor:—
May I offer a comment on the question appearing on page 171 of the current July 15th issue of The Journal regarding the cause of macular degeneration in an apparently normal child? The commentator apparently overlooked the possibility that this might be secondary to infection from Giardia lamblia. If this were the case, improvement or arrest probably would follow from a course of quinacrine hydrochloride, which is specific for this protozoan flagellate.A case of giardiasis with macular lesions in a 9-year-old child was reported recently (Arch Ophthal65:775 [June] 1961). At first this was regarded as a form of macular degeneration.