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Cerebral mucormycosis in diabetic mice after intrasinus challenge
Abstract:
Rhinocerebral involvement is the most common form of mucormycosis in uncontrolled diabetic patients. Streptozotocin-induced diabetic and normal mice were challenged by intrasinus inoculation of Rhizopus oryzae to determine their susceptibility to infection by this route. Ninety percent of diabetic mice and no normal mice died after inoculation with 10(6) spores. Intrasinus inoculations caused minimal direct trauma and low levels of brain inocula, but progressive cerebral infections were induced in diabetic mice.
Insights
Uncontrolled diabetes significantly increases susceptibility to mucormycosis, a fungal infection. Diabetic mice inoculated with Rhizopus oryzae developed progressive cerebral infections and high mortality, unlike normal mice.
Area of Science:
- Mycology
- Infectious Diseases
- Diabetology
Background:
- Rhinocerebral mucormycosis is a severe fungal infection predominantly affecting uncontrolled diabetic patients.
- Mucormycosis poses a significant threat due to its rapid progression and high mortality rates.
Purpose of the Study:
- To investigate the susceptibility of uncontrolled diabetic mice to intranasal inoculation of Rhizopus oryzae.
- To establish a murine model for studying rhinocerebral mucormycosis in diabetes.
Main Methods:
- Streptozotocin was used to induce diabetes in mice.
- Diabetic and normal mice were intranasally inoculated with 10(6) spores of Rhizopus oryzae.
- Survival rates and disease progression were monitored.
Main Results:
- Ninety percent of diabetic mice succumbed to the infection, while no mortality was observed in normal mice.
- Intrasinus inoculation resulted in progressive cerebral infections in diabetic mice.
- Minimal direct trauma and low initial brain inocula were observed.
Conclusions:
- Uncontrolled diabetes confers extreme susceptibility to experimental rhinocerebral mucormycosis.
- This model effectively demonstrates the devastating impact of Rhizopus oryzae in a diabetic host.
- Further research into host-pathogen interactions in diabetic mucormycosis is warranted.