What are the main causes of pyelonephritis?

Related questions

1. What color is your pee if you have a kidney infection?
2. Can pyelonephritis be totally cured?
3. Is pyelonephritis and UTI the same thing?
4. Is pyelonephritis considered a UTI?
5. How does pyelonephritis occur?
6. Do you know when you are dying?

Tags

1. #causing
2. #acute
3. #fungi
4. #carry
5. #common
6. #implicated
7. #backward
8. #yeasts
9. #bacteria
10. #pyelonephritis
11. #vesicoureteral
12. #reflux
13. #urine
14. #bladder
15. #kidneys
16. #however
17. #possibly
18. #cases
19. #refluxing