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Fungal Group Zygomycota01:29

Fungal Group Zygomycota

949
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...
949

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Intestinal mucormycosis in a captive tiger.

Andrea Cappelleri1, Valeria Grieco1, Lisa Vallone1

  • 1Department of Veterinary Medicine and Animal Sciences, University of Milan, Lodi, Italy.

Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
|December 18, 2025
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Mucormycosis, a fungal infection, was identified in captive tigers for the first time. Sawdust litter may have been the source, highlighting the need for careful material assessment in exotic animal care.

Keywords:
Mucor spp.Panthera tigrislittermucormycosisnecrohemorrhagic enteritissawdusttigers

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Area of Science:

  • Veterinary Mycology
  • Infectious Diseases
  • Zoological Medicine

Background:

  • Mucormycosis is an angioinvasive fungal infection caused by Mucorales.
  • While common in cattle, Mucorales infections are rare in other animal species, including felids.
  • No prior reports of mucormycosis exist in non-domestic felids.

Purpose of the Study:

  • To describe the first reported case of mucormycosis in a captive tiger (Panthera tigris).
  • To investigate the potential source and clinical presentation of mucormycosis in a group of tigers.

Main Methods:

  • Histologic examination of organs from a deceased tiger.
  • Identification of fungal hyphae using Periodic Acid-Schiff and Grocott methenamine silver stains.
  • Culture of Mucor colonies from sawdust litter.

Main Results:

  • A 5-year-old tiger presented with symptoms including nasal discharge, anorexia, depression, and hemorrhagic diarrhea.
  • Histopathology revealed severe necrohemorrhagic enteritis with fungal hyphae.
  • Mucor colonies were cultured from the animal's sawdust litter, suggesting a potential infection source.

Conclusions:

  • Mucormycosis is a potential differential diagnosis for necrohemorrhagic enteritis in captive felids.
  • Contaminated sawdust litter is a possible source of infection via inhalation or ingestion.
  • Recommends careful storage and assessment of litter materials for captive animals to prevent fungal infections.