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Myocardial changes in influenza virus and staphylococcus infection
Abstract:
Experiments carried out on 134 newborn mice showed that influenza virus and staphylococcus infection and their combination induces local necrosis in the myocardium. Morphometric measurement has shown that the extent of necrotic changes amounted with the action of the influenza virus to 1.37%, with the action of staphylococcus to 1.4% and with their combined action to 1.8%. Electron microscopy revealed dystrophic changes in cardiomyocytes with subsequent intracellular regeneration.
Insights
Influenza virus and staphylococcus infection in newborn mice cause myocardial necrosis. Combined infection led to more extensive damage, but cardiomyocytes showed signs of regeneration.
Area of Science:
- Cardiovascular pathology
- Infectious diseases
- Cellular biology
Background:
- Myocardial necrosis is a serious condition affecting heart muscle tissue.
- Influenza virus and Staphylococcus aureus are common pathogens with potential systemic effects.
- Understanding combined infections is crucial for predicting cardiac outcomes.
Purpose of the Study:
- To investigate the effects of influenza virus and Staphylococcus aureus, alone and in combination, on the myocardium of newborn mice.
- To quantify the extent of necrosis induced by these infections.
- To examine cellular changes in cardiomyocytes during infection.
Main Methods:
- Experiments were conducted on 134 newborn mice.
- Infections were induced using influenza virus and Staphylococcus aureus.
- Morphometric measurements quantified necrotic areas.
- Electron microscopy was used to analyze cardiomyocyte ultrastructure.
Main Results:
- Both influenza virus and Staphylococcus aureus induced local myocardial necrosis.
- Influenza virus caused 1.37% necrosis; Staphylococcus aureus caused 1.4% necrosis.
- Combined infection resulted in 1.8% necrosis, indicating an additive effect.
- Electron microscopy revealed dystrophic changes and subsequent intracellular regeneration in cardiomyocytes.
Conclusions:
- Combined influenza virus and Staphylococcus aureus infection exacerbates myocardial necrosis in newborn mice.
- Despite necrosis, cardiomyocytes exhibit regenerative potential.
- These findings highlight the cardiotoxic effects of common infections in early life.