Ceftolozane-Tazobactam for Directed Treatment of Pseudomonas Aeruginosa Bacteremia and Pneumonia in Patients With Hematological Malignancies and Hematopoietic Stem Cell Transplantation

Ceftolozane-Tazobactam for Directed Treatment of Pseudomonas Aeruginosa Bacteremia and Pneumonia in Patients With Hematological Malignancies and Hematopoietic Stem Cell Transplantation

A Pilot Study of Ceftolozane-Tazobactam in Conjunction With Rapid Molecular Diagnosis for Directed Treatment of Pseudomonas Aeruginosa Bacteremia and Pneumonia in Patients With Hematological Malignancies and Hematopoietic Stem Cell Transplantation

This is an open-label study, where participants will be given ceftolozane-tazobactam as the primary treatment for Pseudomonas aeruginosa infections. Open-label means both the investigator and the participant will known what drug will be given. Participants will be followed for approximately 60 days. Ceftolozane-tazobactam is approved by the Food and Drug Administration (FDA) for treatment of serious bacterial infection and the investigator hypothesizes that ceftolozane/tazobactam may be effective as the primary antibiotic treatment for Pseudomonas aeruginosa infections.

Participants receive ceftolozane-tazobactam by injection directly into the vein (intravenously, IV) every 8 hours for 10-14 days.

Zerbaxa (ceftolozane/tazobactam) for injection is supplied as a white to yellow sterile powder for reconstitution in single-use vials; each vial contains 1 g ceftolozane (equivalent to 1.147 g of ceftolozane sulfate) and 0.5 g tazobactam (equivalent to 0.537 g of tazobactam sodium).

The proportion of subjects with a complete or partial Global Response (GR). Complete response is defined as "Survival within the prespecified period of observation, resolution of all attributable symptoms and signs of disease and radiological abnormalities, and microbiological evidence of eradication of disease." Partial response is defined as "Survival within the prespecified period of observation, improvement in attributable symptoms and signs of disease and radiological abnormalities, and evidence of clearance of cultures."

This will be measured in days from the Subject's initial Pseudomonas aeruginosa blood culture, until the subject has two consecutive negative blood cultures for Pseudomonas aeruginosa , assessed by examining results from daily blood cultures obtained as standard of care.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28, Day 30, Day 60

Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28, Day 30, Day 60

This will be measured in days from the most recent microbiological isolate susceptibility testing to ceftolozane/tazobactam showing no resistance, to the first identification of resistance to ceftolozane/tazobactam.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

This will be measured in days from initial treatment for Pseudomonas aeruginosa infection until the Subject begins therapy for this infection that is efficacious, based on microbiologic isolate susceptibility testing and review of Subject's concomitant medications.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28, Day 30, Day 60

Microbiological eradication will be defined by resolution of positive blood cultures, by repeat assessment of bronchoalveolar lavage, or in the absence of repeat respiratory tract specimen.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

A physical examination assessing and documenting changes from the previous examination, including any new abnormalities, will be conducted.

This will be measured in days from Subject's initial presentation of pneumonic infiltrates until Subject's pneumonic infiltrates stabilize or resolve, based on diagnostic imaging obtained as standard of care.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

This will be measured in days from initial diagnosis of Pseudomonas aeruginosa infection unit initiation of antimicrobial therapy for this infection, based on review of Subject's concomitant medications.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28, Day 30, Day 60

This will be measured in days from initial diagnosis of Pseudomonas aeruginosa infection until identification of additional bacteria, assessed by examining results from daily blood cultures obtained as standard of care.

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

Screen, Day 1, Day 2, Day 3, Day 4, Day 5, Day 6, Day 7, Day 8, Day 9, Day 10, Day 11, Day 12, Day 13, Day 14, Day 15, Day 16, Day 17, Day 18, Day 19, Day 20, Day 21, Day 22, Day 23, Day 24, Day 25, Day 26, Day 27, Day 28

Inclusion Criteria: At least 18 years old Presence of hematologic malignancy or Hematopoietic Stem Cell Transplantation Exclusion Criteria: Under the age of 18 years old Anaphylactic hypersensitivity or allergic reaction to cephalosporins Participants with expected mortality within 48 hours Hemodialysis or continuous renal replacement therapy

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