Hello Doctor. My Mother 66yrs Got Diabetic Foot Ulcer At

Hello doctor. My mother 66yrs got diabetic foot ulcer at the below big toe on April 2018. She went for daily dressing but that wound got worst and started to heavy discharge. Then it become deep to 3cm. Then we went to GH and the doc said she got bone infection and give her antibiotic tablets for 6weeks and do daily dressing. In september she completed the antibiotic and the wound fully closed n healed. But when they took her boold test it show CRP12.5 which is very high than the normal. And now again she need to take antibiotic for 2weeks. Pls advise me how long the infection take to heal completely? She is taking antibiotic for almost 7months, will that coz to any other complication?