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.
The laboratory tests you may need will depend on the cause of your gastritis. Your doctor may use a stool test to check for the presence of blood, or your doctor may take a sample of tissue, called a biopsy, from your esophagus or stomach. A breath test or a biopsy may detect H. pylori.