Early symptoms include:
- Fever, including sweats, fatigue, muscle aches and chills
- Heart murmur
- Loss of appetite
If the infection gets more serious, it can cause fluid to back up in the lungs, which can cause shortness of breath. If it spreads to the kidneys, the patient may see blood in his or her urine. If it spreads to the brain, it can cause headaches, confusion, and ultimately, stroke.