Composition for the treatment of lesions of the respiratory system

A method comprising:

• administering a therapeutically effective amount of a pharmaceutical composition to a patient in need thereof as a treatment of deficiencies of respiratory functions comprising a reduction and/or impairment of the exchange of oxygen (O2) and carbon dioxide (CO2) between the air and the blood due to lung lesions of the respiratory system caused by a microorganism, said pharmaceutical composition comprising:
• a biocompatible polymer of the following general formula (I)
• wherein:
• A is a glucose monomer,
• X is an R1COOR2, —CH2—COO−, or carboxymethyl,
• Y is an R7SO3R8, —SO3, or —SO3-Nat, wherein:
• R1 is an aliphatic hydrocarbon chain, optionally branched and/or unsaturated,
• R2 and R5 are independently a hydrogen atom or an M+ cation,
• R7 is a bond,
• a is the number of monomers,
• x is the rate of substitution of the A monomers by X groups,
• y is the rate of substitution of the A monomers by Y groups,
• wherein the microorganism is selected from the group consisting of a virus, a bacterium and a parasite, said virus is selected from the group consisting of a coronavirus, a rhinovirus and an influenzavirus, said bacterium is selected from the group consisting of Streptococcus pneumoniae, Hemophilus influenza type B and a mycoplasma, and said parasite is selected from the group consisting of Trypanosoma cruzi and an amoeba.