Bacteriology - gram positive cocci

Question 1

What are the main gram positive cocci?

Answer 1

Staphylococcus
Streptococcus
(Enterococcus)

Question 2

What disease does staphylococcus cause?

Answer 2

Localised lesions - skin infections

Question 3

What disease does streptococcus cause?

Answer 3

Generalised lesions - deeper eg. strangles, endocarditis

Question 4

What does actinomyces cause?

Answer 4

Localised lesions - lumpy jaw

Question 5

What does truperella cause?

Answer 5

Generalised lesions - skin necrosis and mastitis

Question 6

How does dermatophilus cause disease?

Answer 6

Motile spores

Question 7

What is the arrangement of staphylococci?

Answer 7

Irregular clump

Question 8

WHat is the arrangement of streptococci?

Answer 8

Chain

Question 9

Where is staph found?

Answer 9

In environment, on skin and mucous membranes

Question 10

What type of staph is just in dogs?

Answer 10

Staph. pseudintermedius

Question 11

What is the main staph which causes skin infection?

Answer 11

Staph. aureus

Question 12

How does staph aureus appear in lab test?

Answer 12

Haemolytic

Gold more dangerous

Question 13

What are the two types of haemolytic staph aureus?

Answer 13

Staph aureus alpha haemolysin and beta haemolysin

Question 14

What type of haemolysis does each type of haemolytic staph aureus cause?

Answer 14

Alpha haemolysin - complete RBC lysis

Beta haemolysin - partial haemolysis

Question 15

How does Staph aureus alpha haemolysin cause haemolysis?

Answer 15

Plasma membrane porin

Question 16

How does Staph aureus beta haemolysin cause haemolysis?

Answer 16

Phospholipase C

Question 17

What are the general types of disease associated with staphylococci?

Answer 17

Pyogenic skin infections
Dermatitis
Pyoderma
Abcesses
Systemic infections - septicaemia

Question 18

How do you identify the type of streptococci?

Answer 18

Serotyping - Lancefield groups

Question 19

Which one is catalase positive - staph or strep?

Answer 19

Staph

p is first so positive

Question 20

What type of haemolysis does STREP alpha haemolysin cause?

Answer 20

Partial - opposite to STAPH

Question 21

What type of haemolysis does strep beta haemolysin cause?

Answer 21

Full haemolysis - opposite to staph

Question 22

What colour is associated with strep alpha haemolysin?

Answer 22

Green

Question 23

Where is strep found?

Answer 23

Skin
Mucosal membranes
Upper resp tract
GIT
UGT

Question 24

What type of staph causes disease in pigs?

Answer 24

Staph hyicus

Question 25

What disease does staph hyicus cause?

Answer 25

Greasy pig disease - skin dries and falls off

Question 26

What cocci causes suppurative arthritis in piglets?

Answer 26

Strep zooepidemicus

Question 27

What cocci causes strangles like disease in piglets?

Answer 27

Strep porcinus

Question 28

What is the most significant cocci in pigs?

Answer 28

Strep suis

Question 29

What type of pathogen is strep suis?

Answer 29

An obligate pathogen - cant exist in environment

Question 30

What disease does strep suis cause?

Answer 30

Local damage Systemic spread by leucocytes Meningitis/endocarditis/arthritis

Question 31

What bacteria is the most common cause of mastitis in cattle?

Answer 31

Strep uberis

Question 32

What bacteria causes strangyles in horses?

Answer 32

Streptococcus equi

Question 33

WHat is strangles?

Answer 33

Infection of the lymphatics in horses head and neck

Question 34

What causes resp tract infections in horses?

Answer 34

Strep pneumoniae

Question 35

What causes GI tract infections in horses?

Answer 35

Strep zooepidemicus

Question 36

What has less resistance to antibiotics - staph or strep?

Answer 36

Strep

Question 37

What causes lumpy jaw in cattle?

Answer 37

Actinomyces bovis

Question 38

How is lumpy jaw diagnosed?

Answer 38

Sulphur granules in pus

Question 39

What disease does truperella pyogenes cause?

Answer 39

Summer mastitis

Question 40

How does T pyogenes cause disease?

Answer 40

Enters via wounds eg. fly bites

Question 41

What conditions are needed for T pyogenes?

Answer 41

Aerobic, raised CO2

Question 42

What does dermatophilus congolensis cause?

Answer 42

Dermatitis - mud fever and rain scald

Question 43

What is different about dermatophilus congolensis?

Answer 43

Uses zoospores Mycelium in epidermis Branching filaments

Question 44

How is dermatophilus congolensis diagnosed?

Answer 44

Stain scabs for spores and filaments

Question 45

How is dermatophilus congolensis treated?

Answer 45

Iodine and penicillin/streptomycin