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Related Concept Videos

Infection01:20

Infection

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
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Transmission-based Precautions II: Airborne and Protective Environment01:25

Transmission-based Precautions II: Airborne and Protective Environment

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Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
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Steps in Outbreak Investigation01:18

Steps in Outbreak Investigation

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In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
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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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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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Purification of Pathogen Vacuoles from Legionella-infected Phagocytes
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Lessons from Legionnaires' disease.

R P Hudson

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    This summary is machine-generated.

    A 1976 Legionnaires disease outbreak in Philadelphia revealed a previously unknown bacterium causing a deadly pneumonia epidemic. This event highlights the potential for novel bacterial pathogens to emerge and cause significant public health crises.

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    Area of Science:

    • * Epidemiology and Infectious Diseases
    • * Microbiology and Public Health

    Background:

    • * The 1976 Philadelphia Legionnaires' disease outbreak, a significant public health event.
    • * An unrecognized bacterial pathogen caused a severe pneumonia-like illness.

    Observation:

    • * 182 cases of the novel disease were identified among attendees of a Philadelphia convention.
    • * The outbreak resulted in 29 fatalities, underscoring its severity.

    Findings:

    • * A previously unknown bacterium was identified as the causative agent after a 6-month investigation.
    • * The outbreak demonstrated the capacity of bacterial pathogens to emerge and cause epidemics even in developed nations.

    Implications:

    • * Highlights the need for vigilance against emerging infectious diseases and novel pathogens.
    • * Suggests the potential for future large-scale epidemics, necessitating preparedness and response strategies.
    • * Underscores the unpredictable nature of microbial threats and their impact on public health.