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Principles of Disease > Classification of Pathogenic Bacteria > Flashcards

Classification of Pathogenic Bacteria Flashcards

1
Q

Aerobic Gram Positive Cocci

A

Staphylococci
Streptococci
Streptococcus

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2
Q

Positive coagulase test

A

Staph. aureus (MSSA/MRSA)

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3
Q

Staph. aureus is commensal in the _______

A

Nose, axilla, perineum

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4
Q

Negative coagulase test

A

Staph. epidermis (does not produce coagulase enzyme)

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5
Q

Test for streptococci

A

Haemolytic test

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6
Q

Alpha haemolytic

A

Partial haemolysis (streptococcous pneumoniae)

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7
Q

Beta haemolytic

A

Complete haemolysis (streptococcous pyogenes)

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8
Q

Non-haemolytic

A

No haemolysis/Gamma haemolysis (enterococcous faecalis)

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9
Q

Alpha haemolytic streptococci causes______

A

infective endocarditis

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10
Q

Beta haemolytic streptococci causes ________

A

Pharyngitis, cellulitis, necrotising faciitis

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11
Q

Beta haemolytic streptococci are further classified into ________ based on their __________

A

Lancefield Groups and surface antigens

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12
Q

Group A

A

Streptococcus pyogenes

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13
Q

Group B

A

Streptococcus agalactiae (genital tract)

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14
Q

Group D

A

Enterococcus (faecalis, faecium) causes UTIs

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15
Q

Gram Positive Bacilli (aerobic)

A

Bacillus anthracis

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16
Q

Gram Positive Bacilli (anaerobic)

A 
Clostridium:
difficile
perfringens
tetani
botulinum
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17
Q

Clostridium difficile

A

Cannot be cultures
Produce toxin A and B
Spore forming organism

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18
Q

Clostridium perfringens

A

Found in soil and human and animal faeces

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19
Q

Clostridium tetani

A

Produces neurotxin and toxoids can be used as vaccines

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20
Q

Gram negative bacilli (aerobic/facultative anaerobes)

A 
Pseudomonas
Haemophilus
Vibrio
E.coli
Klebsiella
Shigella
Salmonella
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21
Q

E.coli

A

Ferments lactose
Produces endotoxin and exotoxins
Pilli

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22
Q

E.coli methods of detection

A

MacConkey agar
PCR
Immunological

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23
Q

Salmonella ferments lactose (true or false)

A

False

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24
Q

Incubation time of Salmonella

A

12-48 hours

25
2nd most common cause of food poisoning
Salmonella
26
Methods of detection of salmonella
WGS XLD agar ELISA and PCR
27
Haemophilus influenzae
cocco-bacilli (mixed appearance) | Respiratory tract infetion
28
Major cause of meningitis
Haemophilus influenzae
29
How many serotypes does Haemophilus influenzae have
6
30
Method of detection for Haemophilus influenzae
Chocolate agar
31
Method of detection of Pseudomonas aeruginosa
Blood agar
32
Produces slimy biofilms and causes HA sepsis
Pseudomonas aeruginosa
33
Other coliforms
Shigella spp. Klebsiella spp. Proteus spp.
34
Causes Typhoid fever
Salmonella typhi
35
Most common cause of food poisoning
Campylobacter jejuni
36
Features of Campylobacter jejuni
Curved Microaerophillic Self-limiting Found in domestic animals and chicken
37
Causes gastric adenocarcinoma
Helicobacter pylori
38
Gram Negative cocci (aerobic)
Neisseria spp. Meningitidis Gonorrhoea Moraxella Catarrhalis
39
Gram Negative Bacilli (anaerobic)
Bacteriodes Prevotella Porphyromones
40
Consequence of Neisseria meningitidis infection
inflammation of meninges and septeicaemia
41
Detection of Neisseria meningitidis
PCR from EDTA blood
42
Consequence of Neisseria gonnorrhoea
Urethritis and pelvic inflammatory disorder
43
Consequence of Moraxella catarrhalis
Infection of respiratory system, middle ear, CNS and joints
44
Miscellaneous bacteria
``` Mycobacterium Leprosy Spirochetes Syphillis Lyme disease Chlamydia ```
45
Mycobacterium species
Mycobacterium tuberculosis
46
Detection of Mycobacterium tuberculosis
Acid and alcohol fast stain (ZN) Auramine Culture
47
Leprosy causing organism
Mycobacterium leprae
48
Consequence of leprosy
Attacks peripheral nerves
49
Detection method of Spirochetes
Dark field microscopy | Serology
50
Example of spirochetes
Treponema pallidum (syphillis)
51
Syphillis
Primary (chancre) Secondary (latent) Tertiary (CNS) Can be congenital
52
Detection of Syphllis
PCR and serology
53
How is Lyme disease transmitted
Ticks
54
Stages of Lyme disease
Stage 1 - skin rash Stage 2 - systemic illness Stage 3 - Chronic disease
55
Obligate intracellular bacteria
Chlamydia
56
Detection of Chlamydia
Culture - cell lines NAAT Urine and vaginal swabs Serology
57
cocco-bacilli (mixed appearance)
Haemophillus influenzae
58
has over 1500 serotypes
Salmonella
59
WGS, XLD agar and ELISA and PCR are methods of detection
Salmonella

Principles of Disease (32 decks)

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