classification of pathogenic bacteria 1 (gram positive) Flashcards Preview

Principles of disease (Ross Lilley) > classification of pathogenic bacteria 1 (gram positive) > Flashcards

Flashcards in classification of pathogenic bacteria 1 (gram positive) Deck (26)
Loading flashcards...
1

aerobic gram positive cocci

-staphylococci
-streptococci and enterococci

2

the coagulase test

used to distinguish between staphylococci species

3

coagulase positive bacteria

staph. aureus (which can come in methicillin sensitive and resistant strains)

4

coagulase negative bacteria

s. epidermidis
s. haemolyticus
s. saprophyticus

5

blood agar test

used to determine types of streptococci

6

organism turns blood agar green

α-haemolytic streptococci (partial haemolysis)

7

organism turns blood agar clear

β-­haemolytic streptococci (complete haemolysis)

8

organism has no effect on blood agar colour

non-haemolytic streptococci

9

α-­haemolytic
 streptococci exaples

-streptococci pneumoniae
-Viridans streptococci

10

diseases caused by streptococci pneumoniae

pneumonia, meningitis, septicaemia

11

viridans streptococci infections

cause of infective endocarditis

12

β-­haemolytic
 streptococci groups

can be divided into groups A-G. the most clinically important are A, B, F and D.

13

Group A β-haemolytic
 streptococci example

streptococcus pyogenes

14

streptococcus pyogenes diseases

pharyngitis, cellulitis, necrotising fasciitis.

15

pharyngitis

strepthrout, causes by streptococcus pyogenes

16

group B streptococci examples

streptococci agalactiae

17

streptococci agalactiae infections

-neonatal sepsis (meningitis and bacteraemia)
-invasive infections in adults who are normally older and have underlying factors

18

group D streptococci

known as enterococcus spp.

19

enterococcus spp. examples

-enterococcus faecalis
-enterococcus faecium

20

diseases that enterococcus spp. casuse

urinary stract infections, infective endocarditis

21

gram positive bacilli groups

aerobic and anaerobic

22

anaerobic gram positive bacilli examples

-clostridium difficile
-clostridium perfringens
-clostridium tetani

23

clostridium difficile

difficult to culture
causes diarrhoea, associated with toxin production and is potentially fatal.

24

commensal

organism normally found in the body, part of the body's natural microflora

25

clostridium perfringes

found in soil and is a normal commensal in gut. Can cause gastroenteritis when it is ingested in infected food

26

clostridium tetani

produces a toxin which causes uncontrolled muscle spasms.