Study: NCT04986254

Intervention type: OTHER
Intervention: Blood sampling
Description: During a single dosing interval, each participant will have 1 - 8 blood samples taken for each antibiotic. Blood samples (3 mL each) will be drawn from an existing arterial line or central venous catheter. Blood samples will be collected on 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Blood sampling
Description: During a single dosing interval, each participant will have 1 - 8 blood samples taken for each antibiotic. Blood samples (3 mL each) will be drawn from an existing arterial line or central venous catheter. Blood samples will be collected on 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Blood sampling
Description: During a single dosing interval, each participant will have 1 - 8 blood samples taken for each antibiotic. Blood samples (3 mL each) will be drawn from an existing arterial line or central venous catheter. Blood samples will be collected on 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Blood sampling
Description: During a single dosing interval, each participant will have 1 - 8 blood samples taken for each antibiotic. Blood samples (3 mL each) will be drawn from an existing arterial line or central venous catheter. Blood samples will be collected on 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Epithelial lining fluid sampling
Description: Epithelial lining fluid will be sampled using either a bronchoalveolar lavage (BAL) or mini-BAL technique, in accordance with the preferred procedure in participating sites. 3 BAL or mini-BAL samples will be collected over 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Epithelial lining fluid sampling
Description: Epithelial lining fluid will be sampled using either a bronchoalveolar lavage (BAL) or mini-BAL technique, in accordance with the preferred procedure in participating sites. 3 BAL or mini-BAL samples will be collected over 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Epithelial lining fluid sampling
Description: Epithelial lining fluid will be sampled using either a bronchoalveolar lavage (BAL) or mini-BAL technique, in accordance with the preferred procedure in participating sites. 3 BAL or mini-BAL samples will be collected over 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Epithelial lining fluid sampling
Description: Epithelial lining fluid will be sampled using either a bronchoalveolar lavage (BAL) or mini-BAL technique, in accordance with the preferred procedure in participating sites. 3 BAL or mini-BAL samples will be collected over 2 separate occasions; Occasion 1, between Days 1 - 3 of antibiotic therapy and Occasion 2, between Days 3 - 6 of antibiotic therapy.

Intervention type: OTHER
Intervention: Urine sampling
Description: The total urine volume over the duration of the dosing interval will be collected on the two sampling occasions for a calculated urinary creatinine clearance measurement.

Intervention type: OTHER
Intervention: Urine sampling
Description: The total urine volume over the duration of the dosing interval will be collected on the two sampling occasions for a calculated urinary creatinine clearance measurement.

Intervention type: OTHER
Intervention: Urine sampling
Description: The total urine volume over the duration of the dosing interval will be collected on the two sampling occasions for a calculated urinary creatinine clearance measurement.