THE frequent occurrence of virulent strains of Cryptococcus neoformans in pigeon droppings under roosting sites and in old pigeon nests was first reported in 1955 (1).Prompt confirmation of this observation from Japan (£), Cincinnati, Ohio (3)9 and New York City (4) showed that this is not an un¬ usual or geographically restricted association.The pigeon is not a host to C. neoformans but this pathogenic fungus grows as a saprophyte in pigeon manure and can be isolated from the majority of specimens collected in either rural or urban areas.
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C. W. Emmons (1960) studied this question.