CLINICAL BACTERIOLOGY - MODULE 1 [LECTURE]

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PROKARYOTIC OR EUKARYOTIC. What are bacteria?

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1

PROKARYOTIC OR EUKARYOTIC. What are bacteria?

Prokaryotic

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Genome of bacteria

DNA and RNA

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TRUE OR FALSE. All bacteria have DNA and RNA

TRUE

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What is the smallest bacteria

Mycoplasma species

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5

Smallest bacteria are also known as?

Mollicutes

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Since mycoplasma species have no cell wall what shape do they have?

Pleomorphic shape

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7

What is the largest pathogenic bacteria

Bacillus anthracis

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what is the largest non-pathogenic bacteria?

Thiomargarita magnifica

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9

What is used in chemical detoxification?

Formaldehyde

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10

What do you call a detoxified toxins?

Toxoids

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What are weakened form of toxins?

Toxoids

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12

In what degree is the heat stability of toxins

60 degree celsius

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LABILE OR STABLE. heat stability of exotoxins

LABILE

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LABILE OR STABLE. heat stability of endotoxins

STABLE

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This is when they cannot produce fever

Afebrile

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ENDOTOXIN or EXOTOXIN. Which of these cannot produce fever?

EXOTOXIN

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ENDOTOXIN or EXOTOXIN. Which of these are febrile?

ENDOTOXIN

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ENDOTOXIN or EXOTOXIN. Which of these are high in toxicity/potency?

EXOTOXIN

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ENDOTOXIN or EXOTOXIN. Which of the following can be converted into toxoids?

EXOTOXIN

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20

Which toxin is produced by C. botulinum?

Botulinum toxin

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21

What is produced when Botulinum toxin is detoxified?

Botox

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22

Which toxin is produced by Clostridium tetani

Tetanospasmin

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What is produced when Tetanospasmin is detoxified?

Tetanus toxoid

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What do endotoxin have that makes them febrile

Pyretic interleukin-1

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The cell wall of a bacteria is composed of what?

Peptidoglycan/murine

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Cell wall of fungi

Chitin

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Cell wall of plants

Cellulose

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TRUE of FALSE. All prokaryotes have cell well

FALSE

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A bacteria that does not possess cell wall

Mycoplasma

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PROKARYOTE OR EUKARYOTE. Which of the following has a cell membrane without sterols?

Prokaryote

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Prokaryote does not have sterol except for?

Mycoplasma

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Mycoplasma has this wherein it is their site of energy production

Sterol

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33

What is the sterol of plants and fungi

Ergosterol

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What is the sterol of animals

Cholesterol

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35

The reproduction of prokaryotes

Asexual (Binary Fission)

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This refers to the time required for 1 bacteria to split into two

Doubling time/generation time

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Doubling time of S. aureus

30 minutes

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Generation time of T. pallidum

33 hours

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An example of eukaryotes that can also reproduce by binary fission

Protozoans

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This refers to how fast ribosomes settles

Svedberg/Sedimentation unit

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Ribosomes sedimentation unit of prokaryotes

70S; 30S - 50S

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Ribosomes sedimentation unit of eukaryotes

80S; 40S - 60S

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Lysosomes are known as suicide bags as they contain hydrolytic enzymes called?

Lysozymes

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Width of Bacteria in um

0.25-1 um

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Length of Bacteria in um

1-3 um

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Cell wall is also known as

Peptidoglycan/murine layer

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The peptidoglycan layer is composed of?

Disaccharide-pentapeptide subunit

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Disaccharide-pentapeptide subunit is composed of alternating units of?

N-acetylglucosamine and N-acetylmuramic acid

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THICKER or THINNER. Peptidoglycan layer of gram positive

Thicker

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THICKER or THINNER. Peptidoglycan layer of gram negative

Thinner

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Gram positive or gram negative. Presence of outer membrane

Gram negative

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This serves as permeability barrier to hydrophilic/hydrophobic substances

Outer membrane

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Composition of outer membrane

Lipopolysaccharides and other lipids such as lipoproteins

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This is the space between the cell wall and the outer membrane

Periplasm

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The purpose of this is to trap the nutrients that enters the outer membrane. It secures proteins

Periplasm

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This contributes to the (-) charge of your gram (+) cell wall

Teichoic acid and Lipoteichoic acid

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The major contributor in having (-) charge in gram (+)

Teichoic acid

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What do you call the bacteria that are resistant to gram staining?

Acid-Fast organisms

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What is in the peptidoglycan of acid-fast organisms that makes them resistant to gram staining?

Mycolic acid/hydroxymethoxy acid

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In nature, what are acid-fast organisms?

Gram positive

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61

The unique structure of plasma membrane is that it has?

Mesosomes (invaginations)

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This is also known as the cleavage of the cell membrane

Mesosomes

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TRUE or FALSE. Mesosomes are important for cell division

TRUE

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64

The purpose is to serve food reserves

Inclusion bodies

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65

Metachromatic granules are also known as?

Volutin, Babes-ernst

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What bacteria has the inclusion body of metachromatic granules

Corynebacterium diphtheriae

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67

The inclusion body of Yersinia pestis

Bipolar bodies

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68

Yersinia pestis has an appearance of what due to its inclusion bodies

Safety pin

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69

Which bacteria has an inclusion body of much granules

Mycobacterium tuberculosis

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Halber-Stadter prowazek is the inclusion body of what bacteria?

Chlamydia trachomatis

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Halber-Stadter prowazek is also known as the?

Elementary bodies

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What is the name of the inclusion body of Chlamydia psittaci?

Levithal cole lillie

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73

These are non-chromosomal DNA, non-vital and it encodes antibiotic resistance

Plasmids

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Chromosomal DNA encodes for the production of?

mec A gene

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Responsible for the reproduction and viability of bacteria

Chromosomal DNA

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They carry antibiotic resistance genes

Plasmid

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Site of protein synthesis

Ribosomes

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Cytoplasm of bacteria has 2 distinct areas which are?

Amorphous matrix and Inner Nucleoid Region

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Site of energy synthesis

Serves as osmotic and permeability barrier

Regular transport of nutrients in and out of the cell

Plasma membrane

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80

Structure that surrounds the cell wall

Glycocalyx

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81

2 Types of glycocalyx

Capsule and Slime layer

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They are intact, firmly attached to the cell wall of the bacteria

Capsule

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83

Capsule is associated with __ antigen, which means _____

K; kapsule

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General structure of capsules consists of?

Polysaccharides

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85

What is/are the bacteria wherein their capsules contains Polyribosil-ribitol phosphate (PO4)

Haemophilus influenzae

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86

What is/are the bacteria wherein their capsules contains polysaccharides

Streptococcus pneumoniae, Klebsiella pneumoniae, Neisseria meningitidis

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What is/are the bacteria wherein their capsules contains polypeptide D-glutamic acid

Bacillus anthracis

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What is/are the bacteria wherein their capsules contains hyaluronic acid

Pasteurella multocida

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89

What is/are the bacteria wherein their capsules contains alginate

Pseudomonas aeruginosa

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What are the ways to identify if the bacteria has a capsule?

Capsular stain, Neufeld quellung test, mucoid colonies

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What do you call the test wherein the capsule begins to swell?

Neufeld Quellung Test

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Reagent of Neufeld Quellung Test

Serum with anticapsular antibodies

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Loosely attached to the cell wall

Slime layer

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Example of a bacteria with slime layer

Staphylococcus epidermidis

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95

This extracellular structure is usually found in gram negative

Pili/Fimbriae

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96

Pili are made up of protein called?

Pilin

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2 Types of pili

Common pili and Sex pili

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98

What are the other names of common pili?

Somatic, ordinary, adhesion pili

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What are the other names of sex pili?

F, fertility pili

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COMMON PILI OR SEX PILI. For adherence

Common Pili

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