Antibiotic Resistant Bacteria Notes

Antibiotic Resistant Bacteria

Antibiotics

  • Antibiotics are antimicrobial substances active against bacteria.
  • They treat and prevent bacterial infections.
  • Two types:
    • Slow bacterial growth and damage reproduction.
    • Kill bacteria by destroying cell walls.

Antibiotic Resistance

  • Bacteria become resistant when antibiotics no longer kill them.

Multi-Drug Resistant Bacteria (MDRO)

  • Examples: VRE, C-DIFF, MRSA
  • Medical devices contaminated with MDRO do not require special cleaning protocols.

Methicillin-Resistant Staphylococcus Aureus (MRSA)

  • Causes staph infections in the skin.
  • Spread in people with weakened immune systems or chronic infections.

Vancomycin-Resistant Enterococci (VRE)

  • Spread through:
    • IV antibiotic use
    • Colonized patients
    • Fecal contamination
    • Contaminated equipment, hands, and surfaces
  • High-risk groups:
    • Weakened immune systems
    • Prolonged antibiotic treatment
    • Surgical procedures

Vancomycin-Resistant Streptococcus pneumoniae

  • Spread through the air (unspecified mechanism).

Klebsiella

  • Causes pneumonia, nasal infections, urinary tract infections, wound infections, and bloodstream infections.
  • Spread through:
    • Exposure to the bacteria entering the respiratory tract or blood.

Acinetobacter baumannii

  • Small, rod-shaped, opportunistic bacteria.
  • Affects people with compromised immune systems, especially in ICUs.
  • Causes pneumonia, wound infections, and bloodstream infections.
  • Spread through surface contact and person-to-person transmission.

Carbapenem-Resistant Enterobacteriaceae (CRE)

  • Mode of spread not specified in the transcript.

Pseudomonas Aeruginosa

  • Gram-negative bacterium, abundant in the environment.
  • Opportunistically infects high-risk individuals.
  • Multi-drug resistance makes it hard to treat.
  • Causes:
    • urinary tract infections
    • respiratory infections
    • dermatitis
    • soft tissue infections
    • blood, bone, and joint infections
    • gastrointestinal infections
    • systemic infections
  • Spread mechanism not specified in detail but implied to be environmental.

Prevention

  • Proper hand hygiene is essential.