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Volume 29, Number 7—July 2023
Etymologia

Etymologia: Fonsecaea pedrosoi

Author affiliation: Universidade Federal de Goiás, Goiânia, Goiás, Brazil

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Fonse caea pedrosoi [fon-se-se′ə pedro´soi]

Figure

Micrographs showing tissue and culture analyses of a fungal infection case described by Medlar in 1915. A) Section of 5-week-old colony. B) Muriform bodies inside a giant cell. C) Hyphae in a 4-week-old colony. D) Aerial hypha showing numerous, typical sporogenous cells.

Figure. Micrographs showing tissue and culture analyses of a fungal infection case described by Medlar in 1915. A) Section of 5-week-old colony. B) Muriform bodies inside a giant cell. C) Hyphae...

Chromoblastomycosis (CBM) is a neglected tropical disease caused by dematiaceous fungi, mainly Fonsecaea pedrosoi (Figure). This disease resembles blastomycosis in the Americas; the prefix indicates causative microorganisms’ pigmentation. In 1911, Pedroso observed histologic pathognomonic findings for CBM. He also observed rounded and brownish elements, now called muriform cells, in skin biopsy specimens from a patient in Goiás, Brazil. In 1915, Medlar described a similar cutaneous infection on the basis of culture and histologic analyses. In 1922, Brumpt reported Pedroso’s findings as Hormodendrum pedrosoi. Genus description referred to dendroidal conidial chains.

Subsequent publications classified this fungus into different genera (Botrytoides, Phialophora, Phidoconidiophora, and Trichosporium) on the basis of type of sporulation. Multiple forms of conidiation in dematiaceous fungi contributed to frequent genus changes. Terra et al. described this fungus as Acrotheca pedrosoi. In 1936, Negroni renamed this microorganism Fonsecaea pedrosoi because Hormodendrum and Acrotheca reproductive structures were recognized in samples. The genus was named in honor of Fonseca Filho, a Brazilian investigator who made notable contributions to dermatomycoses.

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References

  1. Brumpt  E. Hormodendrum pedrosoi Brumpt. In: Précis de parasitology [in French]. Paris: Masson and Cie; 1922. p. 1105 [cited 2023 Apr 29]. https://agris.fao.org/agris-search/search.do?recordID=US201300541075</eref>
  2. Medlar  EM. A cutaneous infection caused by a new fungus, Phialophora verrucosa, with a study of the fungus. J Med Res. 1915;32:507–22.9.
  3. Negroni  P. Study of the first Argentine case of chromomycosis, Fonsecaea (Neg.) pedrosoi (Brump) 1921 [in Portuguese]. Rev Inst Bacteriol. 1936;7:424.
  4. Pedroso  A, Gomes  JM. About four cases of verrucous dermatitis produced by Phialophora verrucosa [in Portuguese]. An Paul Med Cir. 1920;11:5361.
  5. Terra  F, Torres  M, Fonseca  FO, Arêa-Leão  A. New type of verrucous dermatitis: Acrotheca mycosis associated with leishmaniasis [in Portuguese]. Bras Med. 1922;36:3638.

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Cite This Article

DOI: 10.3201/eid2907.230114

Original Publication Date: May 30, 2023

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Mirelle Garcia Silva-Bailão, Laboratório de Biologia Molecular, Universidade Federal de Goiás, Avenida Esperança s/n ICB2, Sala 217, Goiânia, Brazil

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Page created: May 30, 2023
Page updated: June 20, 2023
Page reviewed: June 20, 2023
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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