Contributor: Gordon K. Klintworth
Retinochoroiditis has many known causes. They include Toxoplasma gondii (toxoplasmosis), Treponema pallidum (syphilis), Mycobacterium tuberculosis (tuberculosis), Onchocerca volvulus (onchocerciasis), sarcoidosis, various types of fungal infection. Fungi that may cause retinochoroiditis are Candida albicans [candidiasis], Histoplasma capsulatum (histoplasmosis), and Aspergillus (aspergillosis). Fungi are an important cause of chorioretinitis in individuals with AIDS.  Retinochoroiditis due to fungi may progress to endophthalmitis [endophthalmitis - fungal]. In regions where onchocerciasis is endemic Onchocerca volvulus can cause a peripapillary retinochoroiditis.