Related Experiment Videos
Ecological effects of antibiotic production by dermatophyte fungi
Abstract:
Antibiotic production by dermatophyte fungi has been demonstrated in vivo in the lesions of patients with dermatomycoses. Patients infected with antibiotic-producing strains more frequently carried cocci resistant to penicillin and other antibiotics than did patients infected with non-producer strains. The total bacterial load was less in lesions caused by producer fungi. In vitro studies demonstrated the selection of penicillin-resistant S. aureus from mixed populations of resistant and sensitive cells.
Insights
Dermatophyte fungi can produce antibiotics in skin infections, leading to more antibiotic-resistant bacteria. These fungi may also reduce the overall bacterial presence in lesions.
Area of Science:
- Mycology
- Dermatology
- Microbiology
Background:
- Dermatophyte fungi are known to cause superficial skin infections (dermatomycoses).
- The potential for these fungi to produce antimicrobial substances in vivo has been investigated.
Purpose of the Study:
- To investigate the in vivo antibiotic production by dermatophyte fungi in human dermatomycoses.
- To determine the impact of antibiotic-producing fungal strains on the associated bacterial populations and their antibiotic resistance.
Main Methods:
- Clinical observation of patients with dermatomycoses.
- Bacteriological analysis of fungal lesions to identify fungal strains and bacterial co-infections.
- In vitro experiments to assess the selection pressure of fungal antibiotic production on bacterial populations.
Main Results:
- Antibiotic-producing dermatophyte strains were identified in vivo.
- Patients with antibiotic-producing fungal strains showed a higher prevalence of penicillin- and antibiotic-resistant cocci.
- Lesions caused by antibiotic-producing fungi had a lower total bacterial load.
- In vitro studies confirmed the selection of penicillin-resistant Staphylococcus aureus from mixed bacterial populations.
Conclusions:
- Dermatophyte fungi can produce antibiotics in the skin environment.
- Fungal antibiotic production in dermatomycoses can influence the development of bacterial antibiotic resistance.
- The presence of antibiotic-producing fungi may lead to a less diverse or reduced bacterial microbiome in lesions.