Thank you for your query.
Though you have provided most of the details you have not mentioned the details of the basic investigations:
1. Total and differential count.
2. Blood culture
These would help us in further guidance.
By your description your husband is suffering from multiple conditions which are complicating the whole management. He appears to be in safe hands and should be on the way to recovery soon.
I hope I have answered your query to your satisfaction.
Wishing your husband an early recovery.
Rajiv K Khandelwal