Deck 1: Sterilization

Question 1

One fact is false about exotoxins:

A) Usually produced by gram +ve bacteria
B) Diffusible
C) immunogenic
D) Heat Stable
E) Specific in action

Answer 1

Heat Stable

Question 2

One fact is true about endotoxins:

A) Produced by gram -ve bacteria
B) Strong immunogenic
C) Heat stable
D) Specific in action
E) Protein in nature

Answer 2

Produced by gram -ve bacteria

Question 3

One fact is false about endotoxins:

A) Produced by gram -ve bacteria
B) Produce fever
C) Can be converted to toxoids
D) Of chromosomal origin
E) Polysaccharide in nature

Answer 3

Can be converted to toxoids

Question 4

Toxoid is:

A) Toxin lost its antigenicity but not toxicity
B) Toxin lost its toxicity but still antigenic
C) Toxin lost toxicity and antigenicity
D) None of the above

Question 5

Carriers are dangerous source of infection more than cases because:

A) They have no clinical symptoms
B) Never shed the organism outside their bodies
C) The isolated organism is more virulent
D) All of the above

Question 6

Exotoxins:

A) Lipoproteins
B) LPS
C) Nucleic acid
D) Portent
E) Peptidoglycan

Question 7

Mode of transmission of Infection by:

A) Droplets
B) Blood
C) Skin
D) Animals
E) All of the above

Question 8

The power of bacteria to invade tissues is due to the following except:

A) Hyaluronidase
B) Collagenase
C) Lecithinase
D) Pill
E) Fibrinolysin

Question 9

Which one of the following best describes the mode of action of endotoxins:

A) Degrades lecithin in cell membrane
B) Hypertension
C) Block release of acetyl choline
D) Causes the release of tumor necrosis factor

Question 10

Protein secreted by both gram positive and gram negative bacteria:

A) Endotoxin
B) Exotoxin
C) Growth factor
D) Cytotoxin

Question 11

Endotoxin →:

A) Denaturated by boiling
B) Form toxoids
C) Pyrogenic
D) Has enzymatic activity

Question 12

Enzyme which can destroy neutrophils and macrophages:

A) Leukocidins
B) IGA protease
C) Coagulase
D) Collagenase

Question 13

Example for Air Filters:

A) Salts filter
B) Sintered filters
C) HEPA Filter
D) Cellulose filter

Question 14

Syringes are sterilized by the process of:

A) Radiation
B) Steaming
C) Autoclaving
D) Flaming

Question 15

Hot air oven generates hot air at:

A) 140 - 160 C
B) 160 - 180 C
C) 120 - 140 C
D) 100 C

Question 16

Sterilization monitoring tests includes all of the following except:

A) Temperature records
B) Pressure records
C) Browne's tube
D) Bacterial spores
E) None of all above

Question 17

Sterilization of bacteriologic loops:

A) Boiling
B) Flaming
C) Incinerating
D) Autoclaving

Question 18

At triple atmospheric pressure, water boils at:

A) 100 C
B) 121 C
C) 134 C
D) 143 C

Question 19

Which of the following has the highest need for sterilization:

A) Not in contact with patient
B) In contact with intact skin
C) In contact with a breath in skin
D) In contact with inflamed skin

Question 20

Apparently health individuals carrying a pathogenic organism without showing clinical manifestation:

A) Infected
B) Carriers
C) True Pathogens
D) Opportunistic pathogens

Question 21

The site of carriage for diphtheria is:

A) Nasal
B) Throat
C) Intestinal
D) Blood

Question 22

Carriers are more serious that a case because:

A) Thay are confined to bed
B) They show manifestation
C) They communicate with public without being noticed
D) They carry the organism the epidemic period
E) All of the above

Question 23

Really cause disease in immune-competent people but can cause serious infections in immune compromised patients:

A) True pathogen
B) Commensal
C) Flora
D) Opportunistic pathogen

Question 24

Infection that has a worldwide distribution:

A) Epidemic
B) Pandemic
C) Endemic

Question 25

Infection which is present at a low level is specific population:

A) Epidemic
B) Pandemic
C) Endemic

Question 26

The organism continue to grow with or without producing symptoms:

A) Acute infection
B) Latent infection
C) 2ry infection
D) Chronic infection

Question 27

The time from initial contacts with the infectious agents to the appearance of the 1^st symptoms:

A) Prodromal stage
B) Invasion stage
C) Incubation period
D) Convalescent period

Question 28

The ability of the organism to cause disease:

A) Infectious dose
B) Pathogenicity
C) Virulence
D) Infection

Question 29

Infectious dose of shigella is:

A) 10
B) 100
C) 100000
D) 1000000

Question 30

Infectious dose of salmonella is:

A) 10
B) 100
C) 100000
D) 1000000

Question 31

Degree of Pathogenicity:

A) Virulence
B) Infection
C) Transmission
D) Variance Factors

Question 32

Specific bacterial surface proteins help entry into cells:

A) Invasins
B) Pill
C) Flagella
D) Capsule

Question 33

Removal of foreign materials from surfaces or item:

A) Disinfection
B) Cleaning
C) Sterilization
D) Antisepsis

Question 34

Minimizing the number of microorganism present on surfaces to a level causing no health problems:

A) Disinfection
B) Cleaning
C) Sterilization
D) Inspissation

Question 35

The process which destroy all forms of microbial life:

A) Cleaning
B) Disinfection
C) Sterilization
D) Antisepsis

Question 36

High level Disinfection kills all of the following except:

A) Vegetative bacteria
B) All spores
C) Fungi
D) Winde range of viruses

Question 37

Intermediate level disinfection skills all of the following except:

A) Tubercle bacilli
B) Wide range of viruses
C) little number of viruses
D) Fungi

Question 38

Low Level disinfection skills:

A) Tubercle bacilli
B) Wide range of viruses
C) Many bacterial spores
D) Vegetative bacteria

Question 39

Koch's steamer is used in the process of:

A) Boiling
B) Pasteurization
C) Steaming
D) Ironing

Question 40

Pasteurization techniques id:

A) Heating to 71C to for 15 Seconds.
B) Heating to 63C to for 30 Seconds.
C) Heating to 63C to for 30 minutes.
D) A&B.
E) A&C.

Question 41

Among this list of organisms, the most resistant are:

A) Enveloped viruses
B) Prions
C) Fungi
D) Nin-enveloped viruses

Question 42

Intermediate level disinfectants include the following except:

A) Phenol
B) Alcohol
C) QAC
D) Chlorine releasing agents

Question 43

All of the following are disinfectants except:

A) Phenol
B) Chlorine releasing agents
C) Iodine
D) Gluteraldehydes

Question 44

Phenols Mechanism of action:

A) Denaturation of proteins
B) Disrupting cytoplasmic membrane
C) Alkylation of nucleic acids
D) Inhibition of glucose oxidation

Question 45

Alcohol concentration as antiseptic is:

A) 40-50% ethyl alcohol
B) 50-60% ethyl alcohol
C) 60-70% ethyl alcohol
D) 70-80% ethyl alcohol

Question 46

Alcohols mechanism of action:

A) Denaturation of proteins
B) Disrupting cytoplasmic membrane
C) Alkylation of nucleic acids
D) Inhibition of glucose oxidation

Question 47

Act by Oxidizing the cell membrane of microorganism:

A) Alcohol
B) Phenol
C) Hydrogen peroxide
D) Iodine

Question 48

Intermediate to high level disinfectant are all of the following except:

A) Iodine
B) Hydrogen
C) Gluteraldehydes
D) Formaldehydes

Question 49

Uses of chlorine releasing agents:

A) Disinfection of water
B) Environmental disinfectant
C) Household bleach
D) all of the above
E) None of the above

Question 50

Used for surgical hand scrub:

A) Alcohol
B) Penol
C) Chorine
D) Iodine

Question 51

Savon and cetrimide:

A) Iodine
B) Hydrogen peroxide
C) QAC
D) Formaldehyde

Question 52

QAC are:

A) High level disinfectant
B) Intermediate level disinfectant
C) Low level disinfectants

Question 53

Used for disinfection (Fumigation) of operating rooms:

A) Hydrogen peroxide
B) Phenol
C) Formaldehyde
D) Gluteraldehyde

Question 54

Used for toxoid Preparation:

A) Iodine
B) QAC
C) Formaldehyde
D) Phenol

Question 55

All of the following can be used in the process of chemical sterilization except:

A) Peracetic acid
B) QAC
C) Hydrogen peroxide
D) Gluteraldehyde

Question 56

Tyndallization is the process of sterilization in Koch's steamer which is achieved on:

A) 2 successive days
B) 3 successive days
C) 4 successive days
D) 6 successive days

Question 57

Sugar media are sterilized through the process of:

A) Radiation
B) Hot air oven
C) Tyndalization
D) Autoclaving

Question 58

Sterilization of serum is done by the process of:

A) Boiling
B) Steaming
C) Filtration
D) Radiation