Fusarium sporodochia on cutaneous wounds

Michael Smith1, Michael R McGinnis

  • 1Division of Clinical Microbiology and Immunology, Department of Pathology, University of Texas Medical Branch, Galveston, TX 77555-0704, USA. mismith@utmb.edu

Medical Mycology
|February 17, 2005
PubMed

Insights

This study reports the first human cases of Fusarium sporodochia in cutaneous injuries, including burn wounds and traumatic injuries. These findings highlight the need for infection control measures to prevent fungal spread during wound care.

Area of Science:

  • Mycology
  • Dermatology
  • Infectious Diseases

Background:

  • Fusarium species are known opportunistic fungal pathogens.
  • Sporodochia, a fungal reproductive structure, have not been previously documented in human infections.

Purpose of the Study:

  • To report the histopathological findings of sporodochia in human Fusarium infections.
  • To describe the morphology of Fusarium sporodochia in clinical specimens.
  • To discuss the implications for infection control in managing cutaneous Fusarium infections.

Main Methods:

  • Histopathological review of 24 Fusarium-positive human specimens.
  • Identification and characterization of sporodochia in eight cases.
  • Analysis of clinical data associated with positive cases.

Main Results:

  • Sporodochia were identified in eight of 24 Fusarium-positive human cases.
  • All identified sporodochia were associated with cutaneous injuries, including burn wounds, ischemic necrosis, and traumatic wounds.
  • The morphology of sporodochia involved swollen cells, parallel hyphae, and conidia formation.

Conclusions:

  • The presence of Fusarium sporodochia in human cutaneous infections is reported for the first time.
  • Clinical care practices must be adapted to minimize the aerosolization and spread of fungal elements (conidia, chlamydospores, budding cells) during wound management.
  • This finding has significant implications for infection control in healthcare settings treating patients with Fusarium-related cutaneous injuries.

Related Concept Videos

Skin Diseases and Disorders01:23

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
Fungal Group Zygomycota01:29

Fungal Group Zygomycota

Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Fungal Phylum Ascomycota01:28

Fungal Phylum Ascomycota

Phylum Ascomycota, a major division within the subkingdom Dikarya, comprises a diverse range of fungal species, including both unicellular yeasts and filamentous molds such as Aspergillus and Penicillium. These fungi thrive in a variety of habitats, from aquatic ecosystems to terrestrial environments, playing crucial ecological and economic roles.Morphology and ReproductionThe defining characteristic of Ascomycetes, commonly referred to as sac fungi, is the ascus—a sac-like structure that...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...