Welcome to healthcare magic!
hominis is a gram positive bacteria which lives on human skin as a commensal which means it does not cause infections in normal persons.
It might have grown due to a contaminated sample from skin.
Your wife seems to have some gut infection- bacterial or viral.
is appropriate in most cases but if no response even on 5th day then you can think of adding the Metronidazole
and a probiotic- Econorm sachet in the doses you physician will know.
You should repeat blood and urine cultures right now and get Tested for Enteric fever
through your physician.
I hope this advise would be helpful for you.
Still if you have any queries or doubts, please write me back,
I would be happy to solve them.
Wish you a great health!