Description of Acanthamoeba culbertsoni
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In this species, the endocysts nor predominantly stellate or, if endocysts predominantly stellate, with tips of endocyst arms (opercula) in depressions formed by ectocyst. Endocyst usually regulary rounded, occasionally slightly polygonal. Ectocyst very thin, undulate or wrinkled, more or less closely applied to endocyst. Mean number of cyst pores less than 6, usually 5-6. Mean diameter of cyst 15-18 microns. Serogically very distinct.