Examples of guano in the following topics:
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- The Guano Islands Act, passed on August 18, 1856, provided for U.S. claims to unoccupied islands containing guano deposits.
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- Histoplasma capsulatum grows in soil and material contaminated with bird or bat droppings (guano).
- Histoplasmosis is not contagious, but is contracted by inhalation of the spores from disturbed soil or guano.
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- Birds, reptiles, and most terrestrial arthropods, such as insects, are called uricothelic organisms because they convert toxic ammonia to uric acid or the closely-related compound guanine (guano), rather than urea.