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Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Antibiotic Selection00:57

Antibiotic Selection

Overview

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Related Experiment Video

Updated: Jun 15, 2026

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
07:46

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat

Published on: June 4, 2012

A veterinary perspective on methicillin-resistant staphylococci.

Leah A Cohn1, John R Middleton

  • 1Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA. cohnl@missouri.edu

Journal of Veterinary Emergency and Critical Care (San Antonio, Tex. : 2001)
|March 17, 2010
PubMed
Summary
This summary is machine-generated.

Methicillin-resistant Staphylococcus aureus (MRSA) is a growing concern in both human and animal health. This pathogen can cause serious infections and potentially spread between species, highlighting the need for awareness and diagnostic vigilance.

Related Experiment Videos

Last Updated: Jun 15, 2026

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
07:46

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat

Published on: June 4, 2012

Area of Science:

  • Veterinary Medicine
  • Infectious Diseases
  • Public Health

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) is a significant human pathogen, often acquired in healthcare settings but increasingly found in the community.
  • MRSA strains exhibit resistance to multiple antimicrobial drugs, complicating treatment options.
  • Staphylococci, including S. aureus, are common commensal organisms, but acquisition of resistance genes poses a public health threat.

Purpose of the Study:

  • To review the epidemiology, diagnosis, and zoonotic potential of methicillin-resistant staphylococci.
  • To highlight the increasing prevalence of MRSA in both human and animal populations.
  • To discuss the implications of MRSA and related resistant staphylococci for animal and human health.

Main Methods:

  • Systematic review of original research publications.
  • Analysis of scientific reviews and abstracts.
  • Inclusion of case reports and conference proceedings.

Main Results:

  • MRSA infections are a major cause of human morbidity and mortality.
  • Domestic animals, including pets and livestock, can be colonized or infected with MRSA.
  • Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is a concern in companion animals like dogs and cats.
  • Zoonotic transmission of MRSA and other resistant staphylococci between animals and humans is a significant risk.

Conclusions:

  • MRSA poses a substantial threat to human health and can be harbored by animals.
  • Animals serve as potential reservoirs for MRSA, facilitating zoonotic transmission.
  • Non-aureus staphylococci acquiring methicillin resistance also present risks for animal and human health.