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#IDFridays Week 52: MRSA

This tough bacteria known as MRSA is often called a super bug because it’s so hard to treat

Name
MRSA aka methicillin-resistant Staphylococcus aureus (pronounced mur-sah)

Transmission

  • Staph are common bacteria that live on our skin, in our noses, and in our throats, but MRSA is caused by a type of staph bacteria that is resistant to several antibiotics
    • 1 in 3 people carry harmless staph bacteria
    • But 2 in 100 people carry the dangerous MRSA bacteria which can cause serious problems if it enters the body
  • MRSA spreads from person to person through touch and direct contact such as:
    • Contact with an infected wound
    • Sharing personal items like towels, clothes or razors that have touched infected skin
    • Touching an infected surface such as a door handle
  • It spreads fast in places with high contact so athletes, students, military personnel, prisoners, nursing home residents, and patients on admission are especially at risk

Geography
Worldwide

Incubation Period
1 – 10 days

Signs and Symptoms
MRSA most often causes skin infections that appear as sores, boils, and bumps. Symptoms include:

  • Fever
  • Red skin
  • Swollen skin
  • Painful skin
  • A bump on the skin that is warm when you touch it
  • An injury that is full of pus or other liquid

 Sometimes the bacteria can spread into the body and cause:

  • Swelling and tenderness in the affected body part
  • Fever
  • Confusion
  • Cough
  • Headache
  • Shortness of breath

Diagnosis
Laboratory testing of tissue samples or nose secretions to find drug-resistant bacteria

Treatment

  • MRSA is resistant to methicillin, amoxicillin, penicillin, oxacillin, and many other common antibiotics
    • Some antibiotics still work to treat it, but the bacteria is constantly evolving and adapting, making it hard for researchers developing new antibiotics to keep up
  • For more serious infections, treatment can include a combination of antibiotic injections that could last several weeks

Prognosis

  • When treated early, mild to moderate skin infections usually heal well
  • Without treatment, the infection can become severe and cause more serious skin infections or infect other parts of the body such as the urinary tract and bones
    • The prognosis of these invasive infections depends on the severity of the infection and patient’s health status
    • Sometimes it can cause pneumonia
    • It can also lead to blood poisoning called sepsis (a life-threatening reaction to severe infection in the body)

Prevention: What Can You Do?

  • Maintain good hand and body hygiene
  • Keep cuts, scrapes, and wounds clean and covered until they have healed
  • Avoid sharing personal items such as towels and razors

MRSA In the News

Sources:
https://www.cdc.gov/mrsa/
http://www.nhs.uk/conditions/MRSA/Pages/Introduction.aspx

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