原发性阿米巴脑膜脑炎是由自由生活的阿米巴引起，多数为福勒尔一耐格里（Naegleriafowleri）原虫，少数由棘阿米已（Acantl。－。；n。0。、ba）原虫弓l起，故该病包括两类：一类为原发性阿米巴脑膜脑炎，多为福勒尔一耐格里原虫感染；另一类为肉芽肿性阿米巴脑炎，多由棘阿米 Primary amoebic meningoencephalitis is caused by the free-living amoeba, most of which are Naegleriafowleri protozoa, a few of which are already present in Acanthus (Acanth .- .; n. ba) Protozoa bow l from, so the disease includes two categories: one is the primary amoebic meningoencephalitis, mostly for Fowler a resistant to Grievances; the other is granulomatous amoebic Inflammation, mostly by acanthosis