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A range of researchers, including the authors, have successfully used staining techniques [sup][3],[4] to identify this multiflagellated protozoon by means of light microscopy, taking into account a series of morphological characteristics including round-to-ovoid shape (20–60 [micro]m in diameter); a double tuft of flagella inserted at the anterior end; absence of a terminal bar (very typical in bronchial ciliated cells) and a certain plasticity of the cytoplasm; as well as the presence of coarse granules and some phagocytic vacuoles.
blattarum does not currently fulfill Koch's postulates, as observation under the microscope is currently the only way to identify this multiflagellated protozoon.