Haplomycosis in Montana Rabbits, Rodents, and Carnivores
1950; Volume: 65; Issue: 33 Linguagem: Inglês
10.2307/4587440
ISSN2327-6258
Autores Tópico(s)Plant Pathogens and Fungal Diseases
ResumoHaplomycosis is the name proposed by Emmons (1) for a disease of animals characterized by the presence in the lungs of the fungus Haplosporangium parvum. This fungus was first cultured during a survey of mycotic infections of rodents in southern Arizona by Emmons and Ashburn (2). Of the 303 rodents examined and cultured in their survey, 25 were found infected with Coccidioides immitis and 101 with H. parvum. Nine rodents were infected with both fungi. A wide range of rodent hosts in nature is indicated by the variety of animals found infected in Arizona which included 23 of 124 Perognathus, 3 of 29 Dipodomys, 5 of 10 Citellus, 1 of 27 Onychomys, and 2 of 113 Peromyscus.1 The presence of Haplosporangium parvrum in native rodents in Alberta, Canada, was noted by Dowding (3, 4) soon after the Emmons and Ashburn survey. Dowding found large fungus cells in the lungs of 14 animals and established the fungus in culture from 8 of these. Infected animals included 13 white-footed deer mice, Peromyscus maniculatus borealis, and one red squirrel, Tamiasciuru-s hudsonicus baileyi. In a later publication, Dowding (5) reported that the infection had probably been found in muskrats in British Columbia by Ian McTaggert Cowan of the University of British Columbia, but she did not state on what evidence the diagnosis had been based. Numerous infected muskrats have been found in western Montana as reported later in this paper. What appears to be the first observation on haplomycosis, although not identified at the time, was made by Dr. Arnold B. Erickson of the University of Minnesota and reported in 1949 (6). The lungs of a beaver collected in Aitkin County, Minnesota, March 31, 1941, were observed to contain an abundance of small discrete white nodules. The writer has examined sections of this material and agrees that the organism is Haplosporangium sp., although presence of infection in rodents in that area has not been confirmed by culture. In 1944 the writer found and later recorded (7) the presence of
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