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Pepsin / ˈ p ɛ p s ɪ n / is an endopeptidase that breaks down proteins into smaller peptides and amino acids. It is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food. Pepsin is an aspartic protease, using a catalytic aspartate in its active site. [2]
Acute pancreatitis (AP) is a sudden inflammation of the pancreas.Causes include a gallstone impacted in the common bile duct or the pancreatic duct, heavy alcohol use, systemic disease, trauma, elevated calcium levels, hypertriglyceridemia (with triglycerides usually being very elevated, over 1000 mg/dL), certain medications, hereditary causes and, in children, mumps.
A defect of the enzyme results in the premature breakdown of red blood cells. This destruction of red blood cells is called hemolysis. [6] Red blood cell breakdown may be triggered by infections, certain medication, stress, or foods such as fava beans. [1] [3] Depending on the specific mutation the severity of the condition may vary. [2]
The pancreas is a large organ behind the stomach that produces digestive enzymes and a number of hormones. [1] There are two main types, acute pancreatitis and chronic pancreatitis. [1] Signs and symptoms of pancreatitis include pain in the upper abdomen, nausea, and vomiting. [1] The pain often goes into the back and is usually severe. [1]
Infection of the stomach with H. pylori does not necessarily cause illness: over half of the global population is infected, but most individuals are asymptomatic. [7] [8] Persistent colonization with more virulent strains can induce a number of gastric and non-gastric disorders. [9]
The Lewis antigen system is a human blood group system. It is based upon two genes on chromosome 19: FUT3, or Lewis gene; and FUT2, or Secretor gene. Both genes are expressed in glandular epithelia. FUT2 has a dominant allele which codes for an enzyme (designated Se) and a recessive allele which does not produce a functional enzyme (designated se).
Immune cells not only recognise pathogen-associated molecular patterns but also damage-associated molecular patterns from damaged tissues. An uncontrolled immune response is then activated because leukocytes are not recruited to the specific site of infection, but instead, they are recruited all over the body.
Any patient presenting with signs or symptoms of bacteremia or a positive blood culture should be started on intravenous antibiotics. [23] The choice of antibiotic is determined by the most likely source of infection and by the characteristic organisms that typically cause that infection.