For viruses, classification is normally based on type of nucleic acid, morphology, presence or absence of an envelope and replication properties. A number of families is recognized, with the family name ending in -viridae, e.g. Poxviridae (double-stranded DNA, enveloped animal viruses).
Heartburn, regurgitation, and dyspepsia are a few of the most common acid reflux symptoms. Heartburn. Also called acid indigestion, heartburn is a burning pain or discomfort that can move up from your stomach to the middle of your abdomen and chest. The pain can also move into your throat.
This can cause symptoms such as a burning chest pain called heartburn. If acid reflux symptoms happen more than twice a week, you have acid reflux disease, also known as gastroesophageal reflux disease (GERD). One common cause of acid reflux disease is a stomach abnormality called a hiatal hernia.ther symptoms of acid reflux disease include: 1  Bloating. 2  Bloody or black stools or bloody vomiting. 3  Burping. 4  Dysphagia -- a narrowing of your esophagus, which creates the sensation of food being stuck in your throat.