Medical Definition of HOMEODOMAIN. : a domain in a protein that is encoded for by a homeobox, that consists of about 60 amino acid residues which are usually similar from one such domain to another, and that recognizes and binds to specific DNA sequences in genes regulated by the homeotic gene.weet. : a domain in a protein that is encoded for by a homeobox, that consists of about 60 amino acid residues which are usually similar from one such domain to another, and that recognizes and binds to specific DNA sequences in genes regulated by the homeotic gene.
Definition. Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a type of staph bacteria that's become resistant to many of the antibiotics used to treat ordinary staph infections.efinition. Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a type of staph bacteria that's become resistant to many of the antibiotics used to treat ordinary staph infections.
MRSA: Methicillin-Resistant Staphylococcus aureus. 1  Staphylococcus aureus, often referred to simply as staph, are bacteria commonly carried on the skin or in the nose of healthy people. An MRSA BSI is when a patient has a positive test for MRSA in the blood along with evidence of an infection, such as a fever. 2  MRSA BSIs are often secondary infections; that is, the result of an MRSA infection in another place, such as the lungs (pneumonia) or a wound.