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Related Concept Videos

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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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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Investigation of Disease Outbreaks01:23

Investigation of Disease Outbreaks

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Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...
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Cholera01:25

Cholera

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Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...
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Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Automated Analysis of Intracellular Phenotypes of Salmonella Using ImageJ
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Salmonella Infections in Childhood.

Fernando J Bula-Rudas1, Mobeen H Rathore2, Nizar F Maraqa1

  • 1Pediatric Infectious Diseases and Immunology, University of Florida College of Medicine-Jacksonville, 653-1 West 8th Street, LRC-3, Pediatrics, L-13, Jacksonville, FL 32209, USA.

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Salmonella infections cause widespread gastroenteritis and typhoid fever, with antibiotic resistance posing challenges. Prevention relies on hygiene, sanitation, and vaccination, especially in vulnerable populations.

Keywords:
Enteric feverNontyphoidal SalmonellaSalmonellosisTyphoid

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Public Health

Background:

  • Salmonella bacteria are a leading cause of global morbidity and mortality, primarily through gastroenteritis and typhoid fever.
  • Nontyphoidal Salmonella strains are commonly carried by pets and transmitted through contaminated food and water, while Salmonella Typhi primarily infects humans.
  • Antibiotic resistance in Salmonella Typhi complicates treatment, particularly in developing countries.

Purpose of the Study:

  • To summarize the epidemiology, transmission, clinical manifestations, and management of Salmonella infections, including nontyphoidal and typhoidal strains.
  • To highlight the challenges posed by antibiotic resistance in Salmonella Typhi.
  • To emphasize the importance of preventive measures such as hygiene, sanitation, and vaccination.

Main Methods:

  • Literature review and synthesis of epidemiological data on Salmonella infections.
  • Analysis of clinical characteristics and treatment recommendations for Salmonella gastroenteritis and typhoid fever.
  • Overview of preventive strategies and available vaccines.

Main Results:

  • Salmonella infections account for billions of diarrheal cases annually, with transmission linked to contaminated food/water and poor hygiene.
  • Nontyphoidal Salmonella typically causes self-limited gastroenteritis but can lead to invasive disease in vulnerable groups; antibiotic treatment is generally not recommended except in infants.
  • Typhoid fever treatment is increasingly difficult due to multidrug-resistant Salmonella Typhi strains, necessitating guidance by local resistance patterns and alternative antibiotics like cephalosporins, azithromycin, or fluoroquinolones.

Conclusions:

  • Effective prevention of Salmonella and typhoid fever relies on robust sanitation, food safety protocols, and hand hygiene.
  • Vaccination against Salmonella Typhi is recommended in endemic areas and for outbreak control.
  • Vulnerable populations, including young children and the immunocompromised, are at higher risk for severe Salmonella infections and complications.