QUERY REGARDING NUTRITIONAL DEFICIENCY.

I am attaching pics of my nails and you can clearly see lines border lines on it indicating some deficiency. I had typhoid in 2017 and since then my nails are deteriorating day by day. My Hb was 13.9 in Dec 2019 which dropped down to 13.1 in June 2020. Why is it ? What is this nutritional deficiency of ? I am taking multivitamin and mineral syrup but still no good. Can this be a result of some gastrointestinal ailment ? I recently went for a stool test and eggs of hookworm were detected and medicine for the same was given. Albendazole 400 for 3 days. What is the reason behind this ? I feel very lethargic. My LFT is also normal. Plz suggest . I also have pain in muscles and bones. And from July 2019 to Oct 2019 I had evening rise of fever with Mantoux Positive. However my chest X-ray was negative and with no complaints of cough. Doctors said to me that Mantoux being positive is a good thing. Why ? Doesn't it suggest TB ? What is an accurate test for it then ?