Please select the eligibility criteria that correspond to the clinical trial below.
Title: Prospective, Randomized Multicenter Trial of Adjunctive Intravenous Therapy With Sodium-selenite(Selenase®, Double-blinded) and a Procalcitonin Guided Causal Therapy (Open) of Severe Sepsis or Septic Shock.
Brief Summary: Severe sepsis and septic shock are diseases of infectious origin with a high risk of death. The purpose of this study is to determine whether the intravenous application of selenium (given as sodium-selenite) can reduce mortality in patients with severe sepsis or septic shock. Additionally, it is investigated, whether the measurement of procalcitonin - a marker of infection - can be used to guide anti-infectious measures in this disease.


Options:
A: Inclusion Criteria:

* suspected lower respiratory tract infection
* must be able to give consent

Exclusion Criteria:

* age under 18 years
* not able to give consent
* admitted not primarily because of the respiratory tract infection
* hospital acquired infections
B: Inclusion Criteria:

1. Patients with clinically suspected or microbiologically confirmed bacterial sepsis
2. Informed consent

Exclusion Criteria:

1. Patients with microbiologically documented infections caused by the following microorganisms: Listeria spp, Legionella pneumophilia, Mycobacterium tuberculosis, Staphylococcus aureus
2. Patients with fungal infections
3. Patients with severe infections due to viruses or parasites (e.g. hemorrhagic fever, malaria)
4. Patients with suspected or confirmed bacterial meningitis or endocarditis
5. Patients with localized, deep-seated abscesses (e.g. brain abscess) without systemic sepsis
6. Patients with chronic, localized infections (e.g. chronic osteomyelitis) without systemic sepsis
7. Neutropenic and other severely immuno-compromised patients (patients infected with human immunodeficiency virus and a CD4 count \< 200; patients on immuno-suppressive therapy after solid organ transplantation; patients with cystic fibrosis)
8. Withholding of life-support
9. Early discharge or death (\< 24 hours after admission)
10. Complete absence of antimicrobial treatment despite suspicion of sepsis
C: Inclusion Criteria:

* Male and female patients who give written informed consent
* Age: adults \>18 years old
* COPD diagnosis according to GOLD guidelines: FEV1/FVC \<70% with FEV1\<80% of predicted. If a COPD diagnosis is not evident from previous spirometric exams of the patient, a new spirometry will be obtained within 3 days of admission and a diagnosis of COPD will be made if all of the following conditions are true: 1) FEV1/FVC \<70% with FEV1 \<80% of predicted; 2) history of cigarette smoking; 3) exclusion of bronchial asthma diagnosis. At the end of the study (i.e. at 6 months) a new spirometric exam will be obtained from these patients to confirm the new diagnosis of COPD made at admission.
* Diagnosis of COPD exacerbation:

  * defined as acute-onset dyspnoea and/or cough associated with increased purulent sputum production (ANTHONISEN criteria)
  * requiring, according to guidelines (GOLD 2005), treatment with antibiotic
  * requiring hospitalization

Exclusion Criteria:

* Female subjects: pregnant, lactating mother or lack of efficient contraception in a subject with child-bearing potential (e.g. contraceptive methods other than oral contraceptives, IUD, tubal ligation)

  * Diagnosis of bronchial asthma
  * Coexisting medical conditions: unstable concomitant cardiovascular, renal, hepatic, gastrointestinal, neurological, endocrine, metabolic, muscle-skeletal, neoplastic, respiratory or other clinically significant disease (patients with stable and well controlled hypertension or diabetes may be included in the study)
  * Clinical significant laboratory abnormalities indicating unstable concomitant disease
  * Patients in whom survival for at least 1 year is unlikely
  * Inability to give informed consent
D: Inclusion Criteria:

* Severe sepsis or septic shock according to ACCP/SCCM criteria
* Onset of severe sepsis or septic shock \<24 h
* Age \>= 18 years
* Informed consent

Exclusion Criteria:

* Pregnant or breast-feeding women
* Fertile female women without effective contraception
* Participation in interventional clinical trial within the last 30 days
* Current participation in any study
* Former participation in this trial
* Selenium intoxication
* No commitment to full patient support (i.e. DNR order)
* Patient's death is considered imminent due to coexisting disease
* Relationship of the patient to study team member (i.e. colleague, relative)
* Infection where guidelines recommend a longer duration of antimicrobial therapy (i.e. endocarditis, tuberculosis, malaria etc)
* Immunocompromised patients

Answer: D