What organism is related to the yeast-like infection caused by bat guano?

The correct organism related to the yeast-like infection caused by bat guano is Histoplasma capsulatum. This fungus is known to thrive in environments rich in organic matter, such as areas where bat droppings (guano) accumulate. When the spores of Histoplasma capsulatum are inhaled, they can lead to histoplasmosis, a respiratory condition that can manifest with flu-like symptoms. This infection is particularly associated with exposure to contaminated soil or materials that contain the droppings of bats and birds, where the spores can become aerosolized and inhaled by humans.

The other organisms listed do not have the same direct link to bat guano. Aspergillus niger is primarily associated with respiratory issues from mold exposure but is not specifically linked to bat droppings. Candida albicans is a yeast that typically resides in the human body and can lead to opportunistic infections, particularly in immunocompromised individuals, but is not derived from bat guano. Cryptococcus neoformans is another pathogen linked to bird droppings, especially pigeon feces, rather than specifically to bats. Thus, Histoplasma capsulatum stands out as the organism most clearly associated with infections resulting from bat guano exposure.