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MRSA is responsible for several difficult-to-treat infections in humans. It caused more than 100,000 deaths worldwide attributable to antimicrobial resistance in 2019. MRSA is any strain of S. aureus that has developed (through natural selection) or acquired (through horizontal gene transfer) a multiple drug resistance to beta-lactam antibiotics.
It is necessary to develop new antibiotics over time since the selection of resistant bacteria cannot be prevented completely. This means with every application of a specific antibiotic, the survival of a few bacteria which already have a resistance gene against the substance is promoted, and the concerning bacterial population amplifies.
Over time, most of the strains of bacteria and infections present will be the type resistant to the antimicrobial agent being used to treat them, making this agent now ineffective to defeat most microbes. With the increased use of antimicrobial agents, there is a speeding up of this natural process. [29]
At one time, methicillin was used to treat infections caused by certain gram-positive bacteria including Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pyogenes, and Streptococcus pneumoniae. Methicillin is only effective against Staphylococcus aureus 50% of the time.
2 NAV-CO 2 systems have an advantage, as they do not attack metals or plastics used in medical environments, and do not contribute to antibacterial resistance. [ citation needed ] An important and previously unrecognized means of community-associated MRSA colonization and transmission is during sexual contact.
Methicillin-resistant Staphylococcus aureus (MRSA) is involved in up to a third of Type II infections. [4] Infection by either type of bacteria can progress rapidly and manifest as shock. Type II infection more commonly affects young, healthy adults with a history of injury. [2] Type III infection: Vibrio vulnificus is a bacterium found in ...
A staphylococcal infection or staph infection is an infection caused by members of the Staphylococcus genus of bacteria.. These bacteria commonly inhabit the skin and nose where they are innocuous, but may enter the body through cuts or abrasions which may be nearly invisible.
Drug, toxin, or chemical resistance is a consequence of evolution and is a response to pressures imposed on any living organism. Individual organisms vary in their sensitivity to the drug used and some with greater fitness may be capable of surviving drug treatment.