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Ch. 14 - Infection, Infectious Diseases, and Epidemiology
Bauman - Microbiology with Diseases by Taxonomy 6th Edition
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBauman 6th EditionCh. 14 - Infection, Infectious Diseases, and EpidemiologyProblema 15
Capitolo 14, Problema 15

Which of the following phrases describes a contagious disease?
a. A disease arising from fomites
b. A disease that is easily passed from host to host in aerosols
c. A disease that arises from opportunistic members of the resident microbiome
d. Both a and b

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Step 1: Understand the definition of a contagious disease. A contagious disease is one that can be easily transmitted from one host to another, often through direct contact or respiratory droplets (aerosols).
Step 2: Analyze option (a): 'A disease arising from fomites.' Fomites are inanimate objects that can carry infectious agents, but diseases transmitted this way are not necessarily contagious in the strict sense, as fomites are indirect transmission routes.
Step 3: Analyze option (b): 'A disease that is easily passed from host to host in aerosols.' This fits the definition of a contagious disease because aerosols allow direct and efficient transmission between hosts.
Step 4: Analyze option (c): 'A disease that arises from opportunistic members of the resident microbiome.' These diseases are typically not contagious because they originate from the host's own microbiome rather than being transmitted between hosts.
Step 5: Conclude that the phrase describing a contagious disease is option (b), since it directly involves easy transmission between hosts via aerosols.

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Contagious Disease

A contagious disease is an infectious illness that spreads easily from one host to another, often through direct contact or respiratory droplets. It typically involves pathogens that can be transmitted via aerosols, bodily fluids, or close physical interaction.
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Communicable vs. Noncommunicable Diseases

Fomites and Disease Transmission

Fomites are inanimate objects or surfaces that can carry infectious agents and facilitate indirect transmission of diseases. While diseases can arise from fomites, this mode of transmission is considered indirect and may not always classify a disease as contagious.
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Communicable vs. Noncommunicable Diseases

Opportunistic Infections from Resident Microbiome

Opportunistic infections occur when normally harmless microbes from the resident microbiome cause disease, usually when the host's immune system is compromised. These infections are not typically contagious since they originate from the host's own microbial flora.
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Microbiome Protects Against Infection
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