[Drug-resistant bacteria of current topics and their resistance mechanisms--VRE]

Y Ike1

  • 1Department of Mycrobiolog, Gumma University Faculty of Medicine.

Rinsho Byori. the Japanese Journal of Clinical Pathology
|May 11, 2000
PubMed

Insights

Vancomycin-resistant Enterococci (VRE) are rare in Japan, primarily found in imported chickens. Two main types, VanA and VanB, exhibit distinct resistance patterns to vancomycin and teicoplanin antibiotics.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Context:

  • Vancomycin-resistant Enterococci (VRE) have been infrequently detected in Japanese hospitals since 1996.
  • VRE are frequently isolated from imported chickens, particularly those from regions using avoparcin in animal feed.
  • Understanding VRE epidemiology in Japan is crucial due to potential public health implications.

Purpose:

  • To describe the prevalence and characteristics of VRE in Japan.
  • To differentiate between VanA and VanB types of glycopeptide resistance in VRE.
  • To inform strategies for VRE surveillance and control.

Summary:

  • VRE detection in Japanese patients has been limited to eight cases across four hospitals since 1996.
  • A significant source of VRE in Japan appears to be imported chickens exposed to avoparcin.
  • Two acquired glycopeptide resistance types, VanA and VanB, are identified, differing in resistance levels and induction triggers.

Impact:

  • Highlights the potential role of imported food products in VRE transmission.
  • Provides a basis for targeted surveillance of VRE in healthcare and agricultural settings.
  • Contributes to the global understanding of VRE resistance mechanisms and spread.

Related Concept Videos

Antibiotic Selection00:57

Antibiotic Selection

Overview
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...
Bacterial Phylum Verrucomicrobiota01:26

Bacterial Phylum Verrucomicrobiota

The phylum Verrucomicrobiota comprises at least four characterized orders, with most species classified within the order Verrucomicrobiotales. Members of this phylum are either aerobic or facultatively aerobic, with the ability to ferment sugars. A notable exception is the genus Methylacidiphilum, which consists of aerobic methanotrophs. Additionally, some Verrucomicrobiota establish symbiotic relationships with protists. These bacteria are widely distributed across various environments,...
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...
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...