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MRSA
noun
: any of several strains of a bacterium (Staphylococcus aureus) that are resistant to methicillin and related antibiotics (such as penicillin) and typically live harmlessly on skin and mucous membranes but may cause usually mild infections of the skin or sometimes more severe infections (as of the blood, lungs, or bones) especially in hospitalized or immunocompromised individuals see ca-mrsa
Examples of MRSA in a Sentence
Recent Examples on the Web
But a bigger concern is methicillin-resistant Staphylococcus aureus, or MRSA, said Dr. Chuck Gerba, a professor of virology at the University of Arizona in Tucson.
—Melanie Radzicki McManus, CNN, 25 Jan. 2025
That said, green light therapy is generally used to treat migraines; yellow light for depression; and blue light to kill resistant strains of bacteria, like MRSA infections, and to treat seasonal affective disorder, a depression that typically onsets in late fall and continues through winter.
—Praveen Arany, The Conversation, 24 Jan. 2025
To make matters worse, the cut had developed a staph (MRSA) infection that could also have forced him out of the fight.
—Kristen Waggoner, Newsweek, 22 Jan. 2025
The genetic material of several human pathogens—among them MRSA, Bartonella quintana, and hepatitis C—has also been found in bedbugs outside the laboratory.
—Kristen V. Brown, The Atlantic, 4 Dec. 2024
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Word History
Etymology
methicillin-resistant Staphylococcus aureus
First Known Use
1979, in the meaning defined above
Phrases Containing MRSA
Dictionary Entries Near MRSA
Cite this Entry
“MRSA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/MRSA. Accessed 2 Feb. 2025.
Kids Definition
MRSA
nounˌem-ˌär-ˌes-ˈā,
ˈmər-sə
: any of several strains of a bacterium that are resistant to many common antibiotics and may cause usually mild infections of the skin or sometimes more severe infections (as of the blood or lungs)
Etymology
methicillin-resistant staphylococcus aureus
Medical Definition
MRSA
noun
: any of several strains of a bacterium (Staphylococcus aureus) that are resistant to methicillin and related antibiotics (such as penicillin) and often live harmlessly on skin and mucous membranes but may cause usually mild infections of the skin or sometimes more severe infections (as of the blood, lungs, or bone) especially in hospitalized or immunocompromised individuals
The rise of superbugs that can survive multiple antibiotics—such as MRSA, the notorious "flesh-eating bacterium"—has turned once-trivial infections into persistent problems.—Valerie Ross, Discover
MRSA—methicillin-resistant Staphylococcus aureus—lives harmlessly in the noses and on the skin of millions of people, but can cause serious harm if it enters the body through a cut and reaches the bloodstream, attacking bones and tissue.—Bob Meadows, People
But in 2002 strains of MRSA that were also resistant to vancomycin began to emerge in hospitals.—Christopher T. Walsh et al., Scientific American
see ca-mrsa
Etymology
methicillin-resistant Staphylococcus aureus
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