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Microbial contaminants in cell culture.
(A) Depending on the bacterial strain introduced, the morphology of bacterial contamination under the microscope can vary from rodlike shapes, cocci, flagellated to barely visible. (B) Yeast forms multicellular stringlike structures that appear ovoid in shape. (C) Mold growth is marked by the production of multicellular, highly connected, thin filaments (hyphae).
