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Related Concept Videos

Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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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...
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Bacterial Gastroenteritis01:18

Bacterial Gastroenteritis

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Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid...
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Bacterial Phylum Proteobacteria01:26

Bacterial Phylum Proteobacteria

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Proteobacteria, one of the largest and most diverse bacterial phyla, encompasses a wide range of Gram-negative bacteria distinguished by their outer membrane composed of lipopolysaccharides. These microorganisms exhibit various metabolic capabilities, including phototrophy, chemolithotrophy, and heterotrophy, and thrive in diverse environments from soil to aquatic systems and host-associated niches. The phylum is divided into six classes: Alphaproteobacteria, Betaproteobacteria,...
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Colonisation of Pathogens01:25

Colonisation of Pathogens

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Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

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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...
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Reservoir of Infection01:30

Reservoir of Infection

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Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...
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Related Experiment Video

Updated: Mar 31, 2026

Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
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Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS

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Emerging bacterial pathogens: the past and beyond.

M Vouga1, G Greub1

  • 1Center for Research on Intracellular Bacteria, Institute of Microbiology, Faculty of Biology and Medicine, University of Lausanne and University Hospital, Lausanne, Switzerland.

Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases
|October 24, 2015
PubMed
Summary
This summary is machine-generated.

Emerging bacterial diseases pose a significant public health threat, often originating from animals or water. Understanding their emergence requires integrating diagnostics, environmental factors, and pathogen evolution.

Keywords:
Disease causationKoch postulatesemerging bacteriaemerging infectious diseasesintracellular bacteriazoonoses

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Area of Science:

  • Microbiology
  • Public Health
  • Infectious Diseases

Background:

  • Emerging and reemerging infectious diseases, particularly bacterial pathogens, represent a major global public health challenge.
  • Since the 1950s, medical communities have increasingly confronted these threats, necessitating a focused review of bacterial origins.

Purpose of the Study:

  • To review emerging and reemerging bacterial infectious diseases.
  • To explore the factors contributing to their emergence.
  • To identify future challenges in managing these diseases.

Main Methods:

  • Identification of 26 major emerging and reemerging bacterial infectious diseases.
  • Analysis of disease origins (zoonotic or waterborne).
  • Review of contributing factors including diagnostic advancements, sociodemographic changes, environmental shifts, and pathogen virulence.

Main Results:

  • Most identified bacterial diseases are zoonoses or waterborne.
  • Key emergence factors include improved diagnostics (culture, molecular, mass spectrometry), increased human exposure due to societal/environmental changes, and the rise of virulent strains/opportunistic infections.
  • Defining clinical implications requires integrating microbiological, clinical, and epidemiological data with experimental models.

Conclusions:

  • Urgent international data collection and financial investment are needed.
  • A comprehensive understanding of the clinical relevance of waterborne and zoonotic emerging bacterial diseases is critical for public health preparedness.