You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Abstract Clinical case A patient with acute amaurosis due central retinal artery occlusion ( CRAO ) , who had mitral regurgitation and _Streptococcus viridans_ positive blood cultures . Using transesophageal ultrasound , the patient was diagnosed with native valve infective endocarditis without fever , and with loss of vision as the only symptom . Discussion CRAO due to infective endocarditis is rare and there are few cases reported in the literature . Semiology and a systematic and comprehensive study of patients with this ophthalmological pathology helps uncover serious underlying medical conditions . Infective endocarditis has many different forms of presentation and a high clinical suspicion is often required to reach a diagnosis .
loss of vision