Departamento de Microbiología-Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, México.
Mem Inst Oswaldo Cruz. 2010 Mar;105(2):127-31. doi: 10.1590/s0074-02762010000200003.
Mites and the mammal pathogenic fungus Histoplasma capsulatum are the major components of bat guano microbiota. Interactions between mites and H. capsulatum were evaluated under laboratory conditions. Acarid mites, mainly Sancassania sp., were the most abundant microarthropod in the sampled guano of the Mexican bat Tadarida brasiliensis mexicana and, based on its morphology, Sancassania sp. was similar to the cosmopolitan species Sancassania sphaerogaster. The mycophagous and vectoring activities of this mite were tested for H. capsulatum and two other fungal species, Sporothrix schenckii (pathogenic) and Aspergillus sclerotiorum (non-pathogenic). S. ca. sphaerogaster was able to reproduce in H. capsulatum and S. schenckii colonies, multiplying in great numbers under controlled fungal mycelial-phase culture conditions. H. capsulatum colonies were completely destroyed after 14 days of in vitro interaction with mites. In contrast, S. ca. sphaerogaster did not reproduce in A. sclerotiorum cultures. S. ca. sphaerogaster was found vectoring H. capsulatum, but not the two other fungal species studied.
螨类和哺乳动物致病真菌荚膜组织胞浆菌是蝙蝠粪便微生物群的主要组成部分。在实验室条件下评估了螨类和 H. capsulatum 之间的相互作用。在取样的墨西哥蝙蝠 Tadarida brasiliensis mexicana 的粪便中，螨类，主要是 Sancassania sp.，是最丰富的微节肢动物，根据其形态，Sancassania sp. 与世界性物种 Sancassania sphaerogaster 相似。对这种螨类的食真菌和传播活动进行了测试，以检测 H. capsulatum 以及另外两种真菌，即 S. schenckii（致病）和 A. sclerotiorum（非致病）。S. ca. sphaerogaster 能够在 H. capsulatum 和 S. schenckii 菌落在中繁殖，在受控的真菌菌丝相培养条件下大量繁殖。与螨虫体外相互作用 14 天后，H. capsulatum 菌落完全被破坏。相比之下，S. ca. sphaerogaster 在 A. sclerotiorum 培养物中没有繁殖。发现 S. ca. sphaerogaster 传播 H. capsulatum，但不传播研究的另外两种真菌。
