Ch 14 Principals of Disease and Epidemioliogy Flashcards Preview

Microbiology > Ch 14 Principals of Disease and Epidemioliogy > Flashcards

Flashcards in Ch 14 Principals of Disease and Epidemioliogy Deck (15):
1

Name the three types of symbiosis and an example of each.

Commensalism, S. epi on skin
Mutualism, E. coli in GI
Parasitism, Swine flu on a host cell

2

What is an opportunistic pathogen and what is an example?

An infection that takes advantage of a host with a weakened immune system or an altered microbiota (such as a disrupted gut flora). Many of these pathogens do not cause disease in a healthy host that has a normal immune system.

Kaposi's Sarcoma arises when immune sys is depressed.

3

What is an infection?

An invasion by a pathogenic microbe.

4

What is a disease?

An infection that results in a state of health.

5

What are some predisposing factors?

Gender
Genetics
Climate
Age
Fatigue
Nutrition
Lifestyle

6

What is the pattern of disease?

Reservoir
Transmission
Inoculation
Pathogenesis

7

Differentiate incidence from prevalence

Incidence is the rate of occurrence of new cases. Prevalence indicates the numbers of cases.

8

Differentiate endemic from pandemic

Endemic pertains to a specific location
Pandemic pertains to the whole world

9

Differentiate morbidity from mortality

Morbidity is the incidence of a death-causing disease
Mortality is the number of deaths from a disease

10

What is herd immunity?

Immunity to a pathogen in a population based on the acquired immunity to it by a high proportion of members over time.

11

What is zoonosis?

Animal reservoir diseases passed to humans.

12

Differentiate primary infection from secondary infection.

Primary: initial-HIV
Secondary: comes from a weakened state-Kaposi's sarcoma

13

How are malaria and salmonella spread?

Malaria is primary
Salmonella is specific secondary, weakened state

14

List Koch's Postulates to determine is a bacteria is the cause of a disease

The bacteria is present in every case of the disease
The bacteria can be isolated
The disease can be reproduced from the bacteria
The bacteria can be recoverable from the host

15

Define commensal.

Living together without injury.