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Thiovulum (thigh-owe-vul-um) is a colourless sulphur bacteria, with deposits of sulphur granules around a central vacuole. Differential interference contrast.
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Dozens of the curved bacteria fill the lumen of a gastric foveola. Hematoxylin & eosin stain, 1000X.
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The organisms, scattered on and above the luminal surface, stain more boldly with the Giemsa technique. 1000X.
