Relationship of Cryptococcus neoformans to pigeons in Milwaukee, Wisconsin.

on the isolation of 0. neoformans from this substratum have been published. B. dermatitidis, however, has not been isolated from pigeon ex¬ creta. On the other hand, to our knowledge, the intravenous mouse isolation technique has not been used to assay materials from pigeon habitats in a large-scale investigation. The investigation reported here seemed justified because the intravenous mouse isolation technique was used to assay numerous samples collected in or near a large city which is located in an area where B. dermatitidis is known to be endemic (2,3). Furthermore, many patients