Midterm Lab Practicum

Question 1

Define direct transmission

Answer 1

occurs through close physical contact between persons and when fine droplets are sprayed directly on a person during sneezing, coughing, or speaking; STI’s common cold, flu, staph, and measles are examples

Question 2

Define indirect transmission

Answer 2

involves an intermediary inanimate object that is divided into famine, parenteral, and vehicle transmission

Question 3

Define fomite transmission

Answer 3

transmission from touching a contaminated utensil, toy, clothing, door knob, etc

Question 4

Define parenteral transmission

Answer 4

transmission from deeply piercing the skin or tissue such as needles and broken glass

Question 5

Define vehicle transmission

Answer 5

transmission from a non-living material such as air, water, soil and food that carries the infectious agent from the infected host to a second, susceptible host

Question 6

Define foodborne illness

Answer 6

illness such as food poisoning usually occur due to improper and/or unsanitary handling of food during or after processing

Question 7

Define waterborne illness

Answer 7

illnesses caused by bacteria that can survive in water for a long time; cholera, e coli, giardiasis primarily originate from fecal contaminated water

Question 8

Define airborne transmission

Answer 8

infectious agents can be on fine dust or moisture particles that can travel a long way and stay in the air for longer than droplets; fungal spores

Question 9

Define vectors

Answer 9

vehicle transmission of infection is through vectors, living organisms that carry pathogens from one host to another. primarily insects and other things like ticks, mosquitos, fleas, biting flies

Question 10

What are the 3 categories of surface growth and their definition

Answer 10

1. ring: a thin rim of growth which may adhere to the inside of the glass tube
2. pellicle: a thick growth of the organism extending across the surface of the liquid
3. flocculant: floating adherent masses

Question 11

What are the 3 categories of subsurface growth and their definitions

Answer 11

1.) turbid: cloudy
2.) granular: small particles
3.) flocculant: small floating masses

Question 12

What are the 3 categories of transparency

Answer 12

1.) opaque
2.) transparent(clear)
3.) translucent(partially transparent)

Question 13

What are the 7 categories of consistency

Answer 13

1.) smooth
2.) mucoid(sticky)
3.) creamy
4.) granular
5.) dry
6.) dull
7.) shiny

Question 14

What are the 2 categories for shape

Answer 14

1.) round
2.) irregular

Question 15

What are the 5 categories for elevation

Answer 15

1.) flat
2.) raised
3.) convex(rounded out)
4.) umbonate(colony with raise center: fried egg colony)
5.) umbilicate: colony with a depressed center

Question 16

What are the 6 categories for margin

Answer 16

1.) entire
2.) undulate
3.) lobulate
4.) filamentous(fine, feathery)
5.) rhizoid: highly branched
6.) swarming: forms film over agar surface

Question 17

What disinfectant do we use in lab

Answer 17

chlorine/bleach

Question 18

What’s the difference between disinfectant and antisepsis

Answer 18

Disinfectant is for inanimate objects and antisepsis we can use on skin/animate objects

Question 19

How do we quality control the autoclave

Answer 19

We put in BT sure vials to make sure it is actually killing the endospores