Huge Curshmann’s spirals in a native sputum smear. Male, 80 years old, chronic bronchitis. Photos 1-4: 100x magnification, photo 5: 400x magnification, photo 6: no magnification (spirals are visible to the naked eye, do not disintegrate when pressing on the coverslip).
🙏Images kindly provided by biologist Natalia Morkhova








