Please select the eligibility criteria that correspond to the clinical trial below.
Title: Aztreonam for Inhalation Solution (AZLI) for the Treatment of Exacerbations of Cystic Fibrosis. An Randomised, Crossover Pilot Study of AZLI Plus Intravenous Colistin® Versus Standard Dual Intravenous Therapy
Brief Summary: This study evaluates the role of AZLI in the treatment of acute pulmonary exacerbations of CF. For consecutive exacerbations patients will receive AZLI + IV Colistin, or two IV anti-pseudomonals.


Options:
A: Inclusion Criteria (selected):

* \> 12 years of age
* Confirmed Diagnosis of Cystic Fibrosis
* Positive sputum culture for P. aeruginosa within the past 12 months
* Patients are able to elicit an FEV1 \>/= 25% but \</= 85% of predicted value at screening
* Have received at least 3 courses of inhaled tobramycin over the preceding 12 months
* Clinically stable with no changes in health status within the last 28 days
* Able to reproducibly produce sputum and perform spirometry

Exclusion Criteria (selected):

* Use of any nebulized or systemic antibiotics within 28 days prior to baseline
* History of hypersensitivity to fluoroquinolones or inhaled or systemic aminoglycosides including tobramycin or any excipients
* Evidence of acute upper within 10 days or lower respiratory infections within 28 days prior to dosing
* CrCl \< 20 at Screening
* History of lung transplantation

Extension Portion of the Study: Patients enrolled in Mpex 209 are permitted to participate in the open label extension as long as they complete Visit 7 (Day 168), provide informed consent for participation in the open label extension of in the study and are clinically stable, as assessed by the Investigator.
B: Inclusion Criteria:

* Male or female ≥12 years of age at Visit 1
* Enrolled in the CFFNPR (Patients may enroll in the Registry at Visit 1 if not previously enrolled.)
* Current hospitalization for treatment of a pulmonary exacerbation
* Planned hospital admission of at least 5 days with intravenous (IV) antibiotics at Visit 1
* Able to perform spirometry at admission and willing to perform spirometry on subsequent treatment and visit days
* Willing and able to complete symptom score daily
* Willing to return for a follow up visit at end of treatment (if necessary) and 28 days after start of IV antibiotic therapy
* Written informed consent (and assent when applicable) obtained from the participant or participant's legal representative

Exclusion Criteria:

* Previous enrollment in this study
* Treatment with IV antibiotics in the 6 weeks prior to Visit 1
* Admission to the intensive care unit for current pulmonary exacerbation
* Pneumothorax on admission
* Current hospitalization for scheduled pulmonary clean out
* Current hospitalization for sinusitis as the primary diagnosis
* Massive hemoptysis defined as \> 250 cc in a 24 hour period, or 100 cc/day over 4 consecutive days occurring within one week of Visit 1
* Current pulmonary exacerbation thought to be due to allergic bronchopulmonary aspergillosis (ABPA)
* Ongoing treatment with prednisone equivalent \>10 mg/day for greater than 2 weeks initiated prior to Visit 1
* History of solid organ transplantation Currently receiving antimicrobial therapy to treat non-tuberculous mycobacterium (e.g., M. abscessus, M. avium complex)
C: Inclusion Criteria:

* Male or female ages less than or equal to 12 years.
* Diagnosis of CF based upon the criteria established by the 1997 CF Consensus Conference: (i) sweat chloride \> 60 mEq/L by quantitative pilocarpine iontophoresis; or (ii) genotype with two identifiable mutations consistent with CF; or (iii) an abnormal nasal transepithelial potential difference, and (iv) one or more clinical features consistent with CF.
* No prior isolation of Pa from respiratory cultures (1 or more cultures in 24 months prior to enrollment), or, if prior isolation of Pa from respiratory cultures, at least a two-year history of Pa negative cultures (1 or more cultures/year), or concurrently enrolled in the EPIC Clinical Trial.
* Signed informed consent to participate in data submission to the CFF National Patient Registry.
* Signed informed consent by parent or legal guardian.
D: Inclusion Criteria:

1. Confirmed diagnosis of CF
2. Patients aged 18 - 65 years of age who can give informed consent
3. FEV1 \>25% or \<75% predicted (in keeping with Cayston® license)
4. Admitted to the Liverpool Heart \& Chest Hospital with an exacerbation of CF pulmonary disease
5. Presence of PA in lower respiratory tract cultures in the 6 months prior

Exclusion Criteria:

1. Documented allergy to beta-lactam antibiotics or IV Colistin
2. Growth of Burkholderia Cepacia Complex (BCC) within 2 years
3. Pregnancy
4. Previous organ transplant
5. Receiving other clinical trial medication
6. Already prescribed regular Cayston®

Answer: D