Re: Please help me ID possible parasite
The problem with your descriptions, are you are describing about 4 families at the same time.
Reddish Brown could be hook worms. They are ~ 32 thousandths in diameter in their observable stage.
Line scars could be strongyloides or migrans. They are larger in diameter.
Filaments could be the cellulose stool, typical of Lyme, Morgellons, Leishmaniasis, Malaria, or any flagellated or spiral
parasite (small), or even a single growth stage of a larger parasite. They are smaller than 6 thousandths.
You do not mention night sweats, which points to nocturnal round worms.
You do not mention loss of vision, which points to filarial or strongyloides. Filaria are ten thousandths in diameter. You can actually see them chew through the hand, leaving a microscopic red streak.
You do not describe mucus or filaments in the stool.
You do not mention nasal blood discharge, which points to a blood worm.
Identification...Needs a slower, more delicate description of body reactions, more general symptoms (shades of grey) to help identify the Phylum(s) of the infection.
Based on your limited description, I would guess Bartonella, Borrelia, flagellate, spirochete.
People usually use a name like Lyme or Leishmania, or Malaria, but these names only mask the name, the treatment, and the process of removing a parasite.
Do not use the name of the illness, use the name of the parasite. In this way you will quickly come to which treatment will work.