Impact of community-associated methicillin resistant Staphylococcus aureus on HIV-infected patients

Joanna Cole1, Kyle Popovich

  • 1Rush University Medical Center, 600 S Paulina Ste 140, Chicago, IL 60612, USA. Joanna_Cole@rush.edu

Insights

Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) disproportionately affects individuals with human immunodeficiency virus (HIV). This review explores factors contributing to increased CA-MRSA risk in the HIV population.

Area of Science:

  • Infectious Diseases
  • Public Health
  • HIV Medicine

Background:

  • Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) is a growing public health concern.
  • Individuals with human immunodeficiency virus (HIV) experience higher rates of CA-MRSA colonization and infection.
  • Factors contributing to this disparity include immune status, healthcare access, and community exposures.

Purpose of the Study:

  • To explore the associations between community exposures and CA-MRSA risk in HIV-infected individuals.
  • To review the current understanding of CA-MRSA epidemiology, pathogenesis, clinical presentation, and treatment in this population.

Main Methods:

  • Literature review of epidemiological studies and clinical case reports.
  • Analysis of factors associated with CA-MRSA risk in HIV-positive individuals.

Main Results:

  • Substance abuse, incarceration, geographic location, and social networks are linked to increased CA-MRSA risk.
  • Immune factors in HIV-infected individuals may play a role in susceptibility.

Conclusions:

  • Understanding these risk factors is crucial for targeted prevention and treatment strategies.
  • Further research is needed to elucidate the complex interplay between HIV and CA-MRSA.

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...
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...
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...
Healthcare Associated Infections II: Preventive Measures01:22

Healthcare Associated Infections II: Preventive Measures

Essential infection prevention measures are based on the knowledge of the infection chain, the modes of transmission in healthcare settings, and the use of the best practices in all healthcare settings. Compulsory public reporting of healthcare-associated infection rates is needed to allow individuals and the community to make informed choices regarding selecting a healthcare facility.
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic01:26

Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic

Healthcare-associated infections (HAIs) occur in a healthcare facility while a person receives care for another ailment. This category also includes work-related infections among healthcare staff.
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies. Common...
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...