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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 6
Capitolo 14, Problema 6

Describe three modes of disease transmission.

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Identify the three main modes of disease transmission: direct contact, indirect contact, and vector-borne transmission.
Explain direct contact transmission as the spread of pathogens through physical contact between an infected individual and a susceptible host, such as touching, kissing, or sexual contact.
Describe indirect contact transmission, which involves the transfer of pathogens via a contaminated intermediate object or surface (fomite), or through airborne droplets expelled by coughing or sneezing.
Define vector-borne transmission as the spread of disease through living organisms (vectors) like mosquitoes, ticks, or fleas that carry pathogens from one host to another.
Summarize by highlighting how understanding these modes helps in implementing effective prevention and control measures in public health.

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Direct Transmission

Direct transmission occurs when infectious agents are transferred directly from an infected individual to a susceptible host through physical contact, such as touching, kissing, or sexual intercourse. This mode allows pathogens to bypass environmental exposure, leading to immediate infection.
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Direct Microscopic Cell Counts

Indirect Transmission

Indirect transmission involves the transfer of pathogens via an intermediate object or organism, such as contaminated surfaces (fomites), food, water, or vectors like mosquitoes. This mode requires the pathogen to survive outside the host before infecting a new individual.
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Transmission Electron Microscope (TEM)

Airborne Transmission

Airborne transmission happens when infectious agents are carried by dust or droplets suspended in the air, allowing them to be inhaled by a susceptible host. This mode can spread diseases over longer distances and does not require direct contact between individuals.
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04:23
Transmission Electron Microscope (TEM)
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Which of the following is the correct sequence of events in infectious diseases?

a. Incubation, prodromal period, illness, decline, convalescence

b. Incubation, decline, prodromal period, illness, convalescence

c. Prodromal period, incubation, illness, decline, convalescence

d. Convalescence, prodromal period, incubation, illness, decline

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List in the correct sequence the five stages of infectious diseases.

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Diseases that are naturally spread from their usual animal hosts to humans are called ___________ .

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Describe the parenteral route of infection.

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Which of the following are most likely to cause disease?

a. Opportunistic pathogens in a weakened host

b. Pathogens lacking the enzyme kinase

c. Pathogens lacking the enzyme collagenase

d. Highly virulent organisms

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Nonliving reservoirs of disease, such as a toothbrush, drinking glass, and needle, are called __________ .

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