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CVSOH BVSc3 > Bacteriology - gram positive cocci > Flashcards

Bacteriology - gram positive cocci Flashcards

1
Q

What are the main gram positive cocci?

A

Staphylococcus
Streptococcus
(Enterococcus)

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2
Q

What disease does staphylococcus cause?

A

Localised lesions - skin infections

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3
Q

What disease does streptococcus cause?

A

Generalised lesions - deeper eg. strangles, endocarditis

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4
Q

What does actinomyces cause?

A

Localised lesions - lumpy jaw

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5
Q

What does truperella cause?

A

Generalised lesions - skin necrosis and mastitis

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6
Q

How does dermatophilus cause disease?

A

Motile spores

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7
Q

What is the arrangement of staphylococci?

A

Irregular clump

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8
Q

WHat is the arrangement of streptococci?

A

Chain

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9
Q

Where is staph found?

A

In environment, on skin and mucous membranes

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10
Q

What type of staph is just in dogs?

A

Staph. pseudintermedius

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11
Q

What is the main staph which causes skin infection?

A

Staph. aureus

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12
Q

How does staph aureus appear in lab test?

A

Haemolytic

Gold more dangerous

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13
Q

What are the two types of haemolytic staph aureus?

A

Staph aureus alpha haemolysin and beta haemolysin

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14
Q

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

A

Alpha haemolysin - complete RBC lysis

Beta haemolysin - partial haemolysis

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15
Q

How does Staph aureus alpha haemolysin cause haemolysis?

A

Plasma membrane porin

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16
Q

How does Staph aureus beta haemolysin cause haemolysis?

A

Phospholipase C

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17
Q

What are the general types of disease associated with staphylococci?

A 
Pyogenic skin infections
Dermatitis
Pyoderma
Abcesses
Systemic infections - septicaemia
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18
Q

How do you identify the type of streptococci?

A

Serotyping - Lancefield groups

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19
Q

Which one is catalase positive - staph or strep?

A

Staph

p is first so positive

20
Q

What type of haemolysis does STREP alpha haemolysin cause?

A

Partial - opposite to STAPH

21
Q

What type of haemolysis does strep beta haemolysin cause?

A

Full haemolysis - opposite to staph

22
Q

What colour is associated with strep alpha haemolysin?

A

Green

23
Q

Where is strep found?

A 
Skin
Mucosal membranes
Upper resp tract
GIT
UGT
24
Q

What type of staph causes disease in pigs?

A

Staph hyicus

25
Q

What disease does staph hyicus cause?

A

Greasy pig disease - skin dries and falls off

26
Q

What cocci causes suppurative arthritis in piglets?

A

Strep zooepidemicus

27
Q

What cocci causes strangles like disease in piglets?

A

Strep porcinus

28
Q

What is the most significant cocci in pigs?

A

Strep suis

29
Q

What type of pathogen is strep suis?

A

An obligate pathogen - cant exist in environment

30
Q

What disease does strep suis cause?

A

Local damage
Systemic spread by leucocytes
Meningitis/endocarditis/arthritis

31
Q

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

A

Strep uberis

32
Q

What bacteria causes strangyles in horses?

A

Streptococcus equi

33
Q

WHat is strangles?

A

Infection of the lymphatics in horses head and neck

34
Q

What causes resp tract infections in horses?

A

Strep pneumoniae

35
Q

What causes GI tract infections in horses?

A

Strep zooepidemicus

36
Q

What has less resistance to antibiotics - staph or strep?

A

Strep

37
Q

What causes lumpy jaw in cattle?

A

Actinomyces bovis

38
Q

How is lumpy jaw diagnosed?

A

Sulphur granules in pus

39
Q

What disease does truperella pyogenes cause?

A

Summer mastitis

40
Q

How does T pyogenes cause disease?

A

Enters via wounds eg. fly bites

41
Q

What conditions are needed for T pyogenes?

A

Aerobic, raised CO2

42
Q

What does dermatophilus congolensis cause?

A

Dermatitis - mud fever and rain scald

43
Q

What is different about dermatophilus congolensis?

A

Uses zoospores
Mycelium in epidermis
Branching filaments

44
Q

How is dermatophilus congolensis diagnosed?

A

Stain scabs for spores and filaments

45
Q

How is dermatophilus congolensis treated?

A

Iodine and penicillin/streptomycin

CVSOH BVSc3 (60 decks)

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