Please select the eligibility criteria that correspond to the clinical trial below.
Title: Antibiotics in Patients With Acute Respiratory Tract Infections in Primary Care in Consideration of Procalcitonin as Additive Parameter
Brief Summary: Antibiotics in patients with acute respiratory tract infections in primary care in consideration of procalcitonin as additive parameter.

The purpose of this study is to compare the ordinary manner of antibiotic- prescription with the prescription in consideration of procalcitonin-value in patients with acute respiratory tract infections.


Options:
A: Inclusion Criteria:

* Ontario primary care physicians
* Prescribe more antibiotics by volume than 75% of Ontario primary care physicians
* A College of Physicians and Surgeons of Ontario number in 2017-2018

Exclusion Criteria:

* None
B: Inclusion Criteria:

* Patients aged 1 month to 16 years with an acute illness for a maximum of 5 days are included consecutively.

Exclusion Criteria:

* Children are excluded if the acute episode was caused by a merely traumatic or neurological illness, intoxication, psychiatric or behavioural problem without somatic cause, or an exacerbation of a known chronic condition. If a physician includes children twice in the study within 5 days, the second registration is considered a repeated measurement on the same subject and is subsequently excluded from the analysis.
C: Inclusion Criteria:

* 18 years or older
* Informed consent
* Respiratory tract infection based on the clinical judgement of the primary care physician

Exclusion Criteria:

* Antibiotic pretreatment in previous 14 days
* Portal hypertension
* Major surgeries or multiple trauma which require hospitalization, in previous 4 weeks
* Autoimmune disease and systemic diseases (lupus erythematodes, wegener´s disease)
* Peritoneal dialysis
* Acute treated or recently operated medullary c-cell-carcinoma, SCLC, carcinoid
* Other inflammatory diseases (e.g. urinary tract infection, pyelonephritis, pancreatitis
D: All patients presenting to a participating GP's office for a consultation for an acute respiratory infection (ARI) will be screened for inclusion in the study

Inclusion Criteria:

* Informed Consent as documented by signature (Informed Consent Form)
* Patients aged 18 years or more
* No antibiotics prescribed for the current episode
* Acute cough of up to 21 days duration and at least one of the following symptom or sign:
* History of fever for more than 4 days
* dyspnoea
* tachypnoea (≥ 22 cycles per minutes)
* abnormal focal finding during auscultation

Exclusion Criteria:

* Previous prescription of antibiotics for the current episode
* Working diagnosis of acute sinusitis or a non-infective disorder
* Cystic fibrosis
* Previous episode of chronic obstructive pulmonary disease exacerbation treated with antibiotics during the last 6 months
* Known pregnancy
* Severe immunodeficiency (untreated HIV infection with CD4 count \< 200 cells/mm3, solid organ transplant receiver, neutropenia, treatment with corticosteroids with dose equivalent to 20 mg prednisone/day for \> 28
* Admission of the patient
* GP not available for performing study
* Patient unable to provide informed consent

Answer: C