Bacterial Pathogenis

Question 1

Virulence

Answer 1

Measure of disease causing ability

Avirulent: does not cause disease
Virulent: bacterial strain with disease causing ability

Question 2

Pathogenicity

Answer 2

The mechanism of how a MO causes infection

Question 3

Parasitism

Answer 3

One microbe diaries benefit from the other

Question 4

Reservoir

Answer 4

Source of MO

The MOs home

Question 5

Contagious

Answer 5

Communicable

Question 6

Infection

Answer 6

Successful invasion of body

Question 7

Infectious

Answer 7

Means capable of invading the body

Question 8

Symbiosis

Answer 8

Living together

Mutualism: both benefit
Commensalism: one benefits, other unharmed
Parasitism: one benefit, one harmed

Question 9

Morbidity

Answer 9

Incidence of disease

Question 10

Mortality

Answer 10

Incidence of death

Question 11

Virulence factors

Answer 11

Pathogens trait to cause disease

Question 12

What is needed for host parasite relationships?

Answer 12

1. Maintain a reservoir
2. Leave the host and create a new infection
3. Colonization of host
4. Damage host to get nutrients

Question 13

Syndrome

Answer 13

A group of symptoms

Asymtomatic: with out symptoms

Question 14

5 stages of diseas

Answer 14

Incubation time between infection and first symptoms
Prodromal: short period of malaise
Illness: most sever stage
Decline: body returns to normal
Convalescence: more recovery from secondary affects

Question 15

Nosocomial

Answer 15

An infection accursed in hospital or clinic
Exogenous: acquired ar healthcare setting
Endogenous: normal flora becomes opertuneistic
Superinfection like MSRA

Question 16

Incidence

Answer 16

Number of new cases

Question 17

Prevelance

Answer 17

Total number of cases

Question 18

Sporadic

Answer 18

Scatter cases

Question 19

Epidemic

Answer 19

Greater frequency than normal

Question 20

Endemic

Answer 20

Stable incidence within population

Question 21

Pandemic

Answer 21

Epidemic on two or more continents

Question 22

3 types of resivoir

Answer 22

1. Environment (soil, air, fo mite, water, food)
2. Zoonotic( from an animal vector)
3. Human body

Question 23

Portal of entry

Answer 23

Gets into body
Right place at right time
Portal can determine disease outcome
Example anthrax

Question 24

Mode of transmision

Direct

Answer 24

Host to host

1. Vertical or placental
2. Horizontal STD
3. Self infect UTI
4. Mechanical vector on the outside of bug
5. Biological vector part of life cycle

Question 25

Mode of transmision

Indirect

Answer 25

Host to another via a fomite

1. Airborn ( not coughing or sensing)
2. Contaminated water or food
3. body fluid transmission ( parenteral needle stick)
4. Respitory droplets

Question 26

Did enough MO enter to cause disease?

Answer 26

W