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Germinating Alternaria alternata spores in the presence of human airway epithelial cells. BEAS-2B cells were incubated with live A. alternata spores for 24 h under normal conditions at 37°C, 5% CO2. Cultures were imaged using an inverted phase-contrast microscope. Magnification: 40×. (A) Untreated BEAS-2B cells, (B) BEAS-2B cells treated with A. alternata spores at 24 h.
