Felis ISSN 2398-2950

Pythium insidiosum

Synonym(s): Hyphomyces destruens, P. insidiosum

Contributor(s): Vetstream Ltd

Introduction

Classification

Taxonomy

  • Aquatic microorganism, fungus.

Active Forms

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Clinical Effects

Epidemiology

Transmission

  • Animals injected by standing in/drinking water infected with zoospores.

Pathological effects

  • Causes cutaneous pythiosis (swamp cancer or Florida horse leeches).
  • Skin lesions are pyogranulomatous or fibrogranulomatous. Disease is chronic and progressive. In horse lesions <45 cm, discharging swellings. Lesions usually on ventral trunk, head or extremities. Nasal mucosa may be involved. Hyphae can be found within granulomatous coagula ('leeches').
  • Dogs can also have intestinal form; more rarely systemic.

Control

Control via animal

Surgery

  • Excize affected tissue.

Control via chemotherapies

Diagnosis

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Bissonnette K W, Sharp N J, Dykstra M H et al (1991) Nasal and retrobulbar mass in a cat caused by Pythium insidiosum. J Med Vet Mycol 29 (1), 39-44 PubMed.

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