Table 3. Infectious causes and symptoms of eosinophilic meningitis.

Organism	Risk	Symptoms	MRI Abnormalities			Eosinophilia
			White Matter Increased Signal on T2/FLAIR	Hydroce phalus	Mass Lesion(s)	Frequency of Peripheral eosinophilia	CSF Degree of Eosinophilia
Angiostrongylus cantonensis [206-208]	Consumption of raw snails, frogs, shellfish, fish, or contaminated vegetables or water.	HA, NV	X			77-90%	+++
Baylisascaris procyonis [209-211]	Ingestion of eggs in raccoon feces (toddlers/young children)	Fever, ataxia, development al regression, SZ	X	X		5-45%	+++
Coccidioides spp. [180, 182, 212-214]	Residing in endemic area. Males of Hispanic, African, and Asian ethnicity. Immunocompromised (HIV, steroid use).	HA, AMS, fever		X	X	19-75%	+/-
Gnathostoma spp. [25, 206, 215]	Ingestion of uncooked fish, amphibians, reptiles, poultry, pork from endemic area (see Table 1)	Sudden pain followed by limb paralysis, urinary retention, AMS	X			∼50%	++
Paragonimus spp. [216]	Consuming uncooked freshwater crabs or crayfish	HA, NV, paralysis, SZ			X	∼88%	+/-
Schistosoma spp. [217-221]	Freshwater contact in an endemic area (see Table 1)	HA, AMS, SZ, limb weakness			X	>50%	+/-
Spirometra spp., Sparganum proliferum [205, 222]	Ingestion of snakes, frogs, or untreated freshwater	Sz, hemiparesis, HA	X	X	X	∼25%	ND*
Taenia solium (Neurocysticercosis) Sotelo, 1985; Earnest, 1987; Shandera, 1994; Castillo-Iglesias, 2005; Monteiro, 1993}	Ingestion of stool from a human infected with pig tapeworm.	SZ, HA, NV, AMS		X	X		+
Toxocara canis or T. cati [223, 224]	Ingestion of eggs in dog/cat feces	AMS, SZ, paralysis.			X	>50%	++

HA Headache, AMS altered mental status, SZ seizure, NV nausea/vomiting

+ <50 eosinophils/μL

++ 50-500 eosinophils/μL

+++>500 eosinophils/μL

^*No Data