Which fungi have a capsule? A. Cryptococcus neoformans B. Histoplasma capsulatum C. Blastomyces dermatitidis D. Coccidioides immitis

The correct answer is B. Histoplasma capsulatum.<br /><br />Histoplasma capsulatum is a fungus that can cause histoplasmosis, an infection that primarily affects the lungs. One of the distinguishing features of H. capsulatum is its ability to form a capsule, which is a protective layer surrounding the fungal cell. The capsule helps the fungus evade the host's immune system and contributes to its pathogenicity.<br /><br />The other options listed are also fungi that can cause infections in humans, but they do not have a capsule:<br /><br />A. Cryptococcus neoformans: This fungus can cause cryptococcosis, primarily affecting the lungs and central nervous system. It does not have a capsule.<br /><br />C. Blastomyces dermatitidis: This fungus can cause blastomycosis, affecting the lungs, skin, and other organs. It does not have a capsule.<br /><br />D. Coccidioides immitis: This fungus can cause coccidioidomycosis, affecting the lungs and other organs. It does not have a capsule.<br /><br />Therefore, the correct answer is B. Histoplasma capsulatum.