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Characterization of Fungal Colonization of Indwelling Esophagostomy Tubes

Shelly J Olin1, David A Bemis2, John R Dunlap3

  • 1Department of Small Animal Clinical Sciences, University of Tennessee, College of Veterinary Medicine, 2407 River Drive, Knoxville, TN 37996, USA.

Case Reports in Veterinary Medicine
|July 26, 2019
PubMed

Insights

Fungal colonization rapidly affects pet feeding tubes, causing damage. This study identifies common fungi on canine and feline esophagostomy tubes, noting structural degradation in one silicone tube.

Area of Science:

  • Veterinary medicine
  • Mycology
  • Biomaterials science

Background:

  • Fungal colonization of medical devices, including feeding tubes, is a known issue in humans, leading to device failure.
  • Esophagostomy tubes (E-tubes) are vital for nutritional support in dogs and cats, but fungal presence and impact on tube integrity are poorly understood.

Observation:

  • Esophagostomy tubes were collected from dogs and cats during routine exchanges.
  • Fungi were isolated and identified using culture and morphological analysis.
  • Tube surfaces were examined using scanning electron microscopy.

Findings:

  • Common fungi, including Candida sp. and Penicillium sp., were identified on E-tubes.
  • Environmental fungi were also detected, indicating potential contamination sources.
  • Degenerative changes were observed in a silicone E-tube, suggesting material compromise due to fungal presence.

Implications:

  • This study is the first to document fungal colonization of silicone and polyurethane E-tubes in companion animals.
  • Findings highlight the potential for fungal infections and device degradation in veterinary patients using E-tubes.
  • Further research is warranted to explore preventative strategies and the clinical impact of fungal colonization on E-tube longevity and function.

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