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Volume 23, Number 2—February 2017
Etymologia

Etymologia: Emmonsia

Ronnie HenryComments to Author 

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Emmonsia [ĕ-monʹse-ə]

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Thumbnail of Isolate UAMH 125 Emmonsia parva grown in slide culture preparation for 14 days at 25°C. Image courtesy of Lynne Sigler, University of Alberta Microfungus Collection (now UAMH Centre for Global Microfungal Biodiversity, https://www.uamh.ca), University of Alberta, Edmonton, Alberta, Canada.

Figure. Isolate UAMH 125 Emmonsia parva grown in slide culture preparation for 14 days at 25°C. Image courtesy of Lynne Sigler, University of Alberta Microfungus Collection (now UAMH Centre for Global Microfungal...

Emmonsia (Figure) is a genus of soil fungus that can cause adiaspiromycosis, a pulmonary disease common in wild animals, but rare in humans, as well as disseminated disease. When aerosolized spores are inhaled, they enlarge dramatically, from 2–4 μm to 40–500 μm in diameter. Because these swollen cells do not replicate, Emmons and Jellison termed them “adiaspores” (from the Greek a [“not”] + dia [“by”] + spora [“sowing”]). Emmonsia was first described by Chester W. Emmons, senior mycologist with the US Public Health Service, as Haplosporangium parvum in 1942. In 1958, it was reclassified into a separate genus and named in honor of Emmons. Recent phylogenetic analyses have concluded that fungi in this genus are polyphyletic, and proposed taxonomic changes may render the genus name obsolete.

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References

  1. Ciferri  R, Montemartini  A. Taxonomy of Haplosporangium parvum. Mycopathol Mycol Appl. 1959;10:30316. DOIPubMed
  2. Emmons  CW, Ashburn  LL. The isolation of Haplosporangium parvum n. sp. and Coccidioides immitis from wild rodents: their relationship to coccidioidomycosis. Public Health Rep. 1942;57:171527. DOIPubMed
  3. Emmons  CW, Jellison  WL. Emmonsia crescens sp. n. and adiaspiromycosis (haplomycosis) in mammals. Ann N Y Acad Sci. 1960;89:91101. DOIPubMed
  4. Schwartz  IS, Kenyon  C, Feng  P, Govender  NP, Dukik  K, Sigler  L, et al. 50 years of Emmonsia disease in humans: the dramatic emergence of a cluster of novel fungal pathogens. PLoS Pathog. 2015;11:e1005198. DOIPubMed
  5. Sigler  L. Adiaspiromycosis and other infections caused by Emmonsia species. In: Hay RJ, Merz, editors. Topley and Wilson’s microbiology and microbial infections. 10th ed. London: Arnold Hodder; 2005. p. 809–24.

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Cite This Article

DOI: 10.3201/eid2302.et2302

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Table of Contents – Volume 23, Number 2—February 2017

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Ronnie Henry, Centers for Disease Control and Prevention, 1600 Clifton Rd NE, Mailstop E03, Atlanta, GA 30329-4027, USA

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Page created: January 18, 2017
Page updated: January 18, 2017
Page reviewed: January 18, 2017
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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