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Lecythophora Mold Species

Lecythophora species is a rare causative agent of Endocarditis.

(Information from A Clinical Laboratory Handbook: Identifying Filamentous Fungi )

 

 

Taxonomic Classifications

 

Kingdom: Fungi
Phylum: Deuteromycota (Fungi Imperfecti)  

Genus: Lecythophora

 

 

Lecythophora Mold Picture

 

 

Lecythophora species

(Image Courtesy of www.doctorfungus.org @ 2005)

 

Atlas Scan Images of the conidiogenous cells, conidia, and chlamydospores of Lecythophora mutabilis.

 

 

Ecology

Lecythophora species are cosmopolitan and are occasionally isolated from soil and from plant debris. 

 

Species

The genus Lecythophora is a mold that lacks a known sexual state thus, is categorized under Fungi Imperfecti.  It is generally classified as a dematiaceous fungus which is mainly attributed to its darkly colored fungal body due to the presence of melanin in the cell walls of its conidia, hyphae or both.  There are three species classified under this genus namely, Lecythophora hoffmannii, Lecythophora lignicola, and Lecythophora mutabilis.

 

Pathogenicity and Health Effects

Only two cases of cases of endocarditis have been reported from humans, one of gluteal abscess - and one of peritonitis which is an inflammation of the peritoneum tissue lining of the abdominal wall and most of the organs in the abdomen.

 

Macroscopic Appearance

      Growth rate is moderately rapid and texture is initially slimy becoming lightly downy at the center of the colony; and

      Both surface and reverse colony color is pale pink to salmon, however, becoming pale to deep brown at times. 

 

Microscopic Appearance

      Hyaline and septate hyphae, adelophialides, conidia and chlamydospores are present;

      Adelophialides are type of phialides which are not septated at the base, short, cylindrical or conical in form, may often appear solitary, sometimes in groups that are arranged in short lateral filaments, however, phialides with septate bases are sometimes present;

      Conidia are hyaline, ellipsoidal to cylindrical in shape but may be slightly curved at times, and may give rise to secondary conidia occasionally;

      Brown colored chlamydospores may sometimes be present.

 

Lecythophora species

Differences in Microscopic Appearance

Lecythophora hoffmannii

Produces pink colonies

Lecythophora lignicola

Produces brown mature colonies due to its formation of numerous brown chlamydospores

Lecythophora mutabilis

Produces colonies which become brown, however, in this case the brown colored pigment develops in the hyphae alone, since chlamydospores are absent

 

Laboratory Precautions

Only general laboratory precautions are required, no special safety measures needed.

 

Susceptibility
No available data.
 

The mycological information gathered and
organized in this extensive research on different
Pathogenic Molds was sourced out from the list
of informative websites and reference below:
http://www.osha.gov
http://www.doctorfungus.org
http://www.mycology.adelaide.edu.au
http://www.mycology.adelaide.edu.au

http://www.dehs.umn.edu
http://www.mold-help.org
http://www.mycology.net
http://www.clinical-mycology.com
http://www.botany.utoronto.ca
http://www.med.sc.edu
http://www.tigr.org
http://www.pangloss.ucsfmedicalcenter.org
http://www.dermnz.org
http://ncbi.nlm.nih.gov
http://www.wadsworth.org
http://botit.botany.wisc.edu

A Clinical Laboratory Handbook: Identifying Filamentous Fungi by St. Germain, Guy and R. Summerbell.

 

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