Your question is more appropriately addressed to your father's doctor.
An infection in the blood is serious, as it is circulated through the rest of the body. However, as he has been admitted and they are aware of the problem, he is in the best possible place for treatment.
Good luck. Keep in close contact with your dad. He needs your support, and you need to know about the condition that affects the closest genetic match to you...your father!
Information on this site is provided for informational purposes only.
It is not meant to substitute for medical advice provided by your physician or other medical professional.
If you have or suspect that you have a medical problem, promptly contact your physician or health care provider.