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Intestinal Candida phospholipase is not elevated in patients with antibiotic-associated diarrhea
Robert Krause1, Renate Haberl, Christina Strempfl
1Department of Internal Medicine, Karl-Franzens University, Graz, Austria. robert.krause@kfunigraz.ac.at
Abstract:
In order to assess the role of Candida-secreted phospholipase in antibiotic-associated diarrhea (AAD), 43 fecal Candida isolates from patients with AAD and from controls were tested on egg yolk agar for production of phospholipase. Phospholipase zones did not differ between the isolates from patients with AAD and from controls. The data indicate that the fungal virulence factor phospholipase may not be responsible for AAD in adults.
Insights
Candida phospholipase, a fungal virulence factor, was investigated for its role in antibiotic-associated diarrhea (AAD). Phospholipase production did not significantly differ between Candida isolates from AAD patients and controls, suggesting it may not cause AAD in adults.
Area of Science:
- Medical Mycology
- Gastroenterology
- Infectious Diseases
Background:
- Antibiotic-associated diarrhea (AAD) is a common complication of antibiotic therapy.
- Candida species are frequently found in the human gut and possess various virulence factors.
- Phospholipase is a secreted enzyme by Candida that may contribute to pathogenicity.
Purpose of the Study:
- To investigate the potential role of Candida-secreted phospholipase in the pathogenesis of antibiotic-associated diarrhea (AAD).
- To compare phospholipase production in Candida isolates from patients with AAD versus healthy controls.
Main Methods:
- Collected 43 fecal Candida isolates from patients with AAD and control individuals.
- Assessed phospholipase production using the egg yolk agar assay.
- Quantified phospholipase activity by measuring the diameter of phospholipase zones.
Main Results:
- No significant difference was observed in phospholipase production between Candida isolates from AAD patients and control subjects.
- The size of phospholipase zones on egg yolk agar was comparable across all tested isolates.
- These findings do not support a direct role for Candida phospholipase in AAD.
Conclusions:
- The fungal virulence factor phospholipase is unlikely to be a primary cause of antibiotic-associated diarrhea in adults.
- Further research may be needed to explore other Candida virulence factors or host-related mechanisms in AAD pathogenesis.