MP101-1001

Inclusion Criteria: * Subjects aged 19 years or older. * Clinical diagnosis of acute pneumonia with radiologic evidence of pulmonary infiltrates. * Confirmed Pseudomonas aeruginosa (PA) infection via valid respiratory specimens. * PA isolate demonstrates susceptibility to MP101 and non-susceptibility to current antibiotic therapy. * Adequate organ function as defined by hematological, hepatic, and renal laboratory parameters . Exclusion Criteria: * Persistent septic shock or hemodynamically unstable condition. * Active pulmonary tuberculosis or non-bacterial pneumonia. * Significant pleural effusion or lung abscess requiring therapeutic drainage. * Clinically significant cardiovascular, hepatic, or renal impairment . * Immunocompromised status or hematological malignancies. * Known hypersensitivity to bacteriophages, study components, or concomitant antibiotics. * Participation in another clinical trial within 30 days prior to screening. * Any medical condition that, in the opinion of the investigator, would make the subject unsuitable for the study.