title: [Reduced mycobacterial resistance to antituberculous drugs in the experiment and clinic: immediate and long-term results].
abstract: A suspension of multidrug resistant clinical Mycobacterium tuberculosis (MBT) strain, at a concentration of 1 x 10(8) microbes per ml, resistant to streptomycin (S), rifampicin (R), isoniazid (I), and kanamycin (K), was in vitro treated for 60 minutes with dissolved ozone (pO3) at a concentration of 0.5-4 microg/ml). Then it was placed in the Lowenstein-Jensen media containing various concentrations of S, I, R, and K. Following 3 months, drug susceptibility was determined by the number of cultured colonies and MBT was used to prepare a suspension at the same concentration, which was again treated with pO3 by the same procedure and placed to the media containing the drugs. A session was thrice repeated. After each pO3 treatment, MBT resistance to I decreased and it completely disappeared after triple treatment. Each pO3 treatment caused a reduction in MBT resistance to R, but it was high (640 microg/ml). After double pO3 treatment MBT resistance to S decreased, but it was recovered after its third ozone treatment. All pO3-untreated control cultures showed a growth of more than 100 colonies. Sixty-eight BALC/s mice were in vivo inoculated via intravenous injections of the clinical MBT strain resistant to S, I, R, and K. The mice were divided into 5 groups: 1) intact mice; 2) those inoculated and untreated; 3) those treated with 1; 4) those treated with I and peritoneally given pO3, 0.5-4 microg/ml); and 5) those given pO3. The animals began dying at month 4 of inoculation. By month 5, all mice, other than intact and pO3-treated ones, died. Passage of MBT from the month by month 4 showed a reduction in their resistance to I in the groups treated with pO3. When the mice were treated with I alone, damages to their livers and spleens were greater than when they were untreated. With co-administration of I and pO3, the damage was least. Treatment provoked a rapid change of MBT to granular and L-forms and MBT was undetectable in its typical form after 1-2-month therapy. The altered MBT formed an untypical histological pattern of tuberculous inflammation in mice in the presence of characteristic cellular cooperation. Clinical studies indicated that 1-6-month concurrent use of chemotherapy and pO3 in patients with drug-resistant tuberculosis eliminated drug resistance of isolated MBT to one of the drugs (I, R, K) in 97.3%, MBT became at once susceptible to I, R, and K in 47.2%. I and/or R were successfully used in the treatment of more than a third of the patients. The studies have demonstrated that most patients with drug-resistant pulmonary tuberculosis can be treated with the most effective drugs provided that systemic intravenous injection of pO3 is made.
authors.forename: I I
authors.initials: II
authors.lastname: Belianin
authors.forename: E I
authors.initials: EI
authors.lastname: Shmelev
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D000904:Antibiotics, Antitubercular / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D000995:Antitubercular Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use*; D004195:Disease Models, Animal; D024901:Drug Resistance, Multiple, Bacterial / Q000187:drug effects; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D007538:Isoniazid / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D007612:Kanamycin / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008875:Middle Aged; D009169:Mycobacterium tuberculosis / Q000187:drug effects* / Q000302:isolation & purification; D010126:Ozone / Q000008:administration & dosage / Q000494:pharmacology*; D013902:Radiography, Thoracic; D012293:Rifampin / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D013307:Streptomycin / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D013997:Time Factors; D016896:Treatment Outcome; D018088:Tuberculosis, Multidrug-Resistant / Q000188:drug therapy*; D014397:Tuberculosis, Pulmonary / Q000000981:diagnostic imaging / Q000188:drug therapy*
chemical_list: D000900:Anti-Bacterial Agents; D000904:Antibiotics, Antitubercular; D000995:Antitubercular Agents; D007612:Kanamycin; D010126:Ozone; D007538:Isoniazid; D012293:Rifampin; D013307:Streptomycin