The present invention describes the use of immunomodulators to support the usual treatment against infectious diseases caused by facultative intracellular organisms. Starting from an analysis of the immune response installed in this type of infection, particularly the infection caused by Tuberculosis, a treatment kit is used that associates a soluble betaglycan type immunomodulator, associated with an anti-inflammatory agent of the prostaglandin E blocking type, which, when used together, modulate the immune response, thus permitting a shortening in treatment time with the respective antibiotics.