One of the responsible for one of the major cases of corruption that stole millions from the government spent only 1 year and half in jail. That guy stole for more than 12 years. Nobody cares. Second, the people in Brazil do not have, in general, political inclinations.
Faecal samples may be collected for microbiological culture if the child has significant associated abdominal pain or blood in the stool, as a bacterial cause of gastroenteritis is more likely. However these results usually don't alter treatment.
Gastritis can be diagnosed by the patient's symptoms and history (for example, NSAID and/or alcohol consumption), or by breath, blood, stool, immunological, and biopsy tests to detect H. pylori and other tests such as endoscopy or radiologic studies demonstrate mucosal changes.