FAC33: Mastitis Identification and Treatment Flashcards

1
Q

Define Somatic Cell Counts (SCC).

A

Measurement of the number of cells in the milk. Specifically epithelial cells and white blood cells

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2
Q

How is SCC measured?

A

Automatic methods (fossomatic method)

California mastitis test (CMT)

Whiteside test (NaOH)

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3
Q

What are the different types of SCC?

A

Bulk milk SCC and Individual SCC

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4
Q

Why are SCC important?

A
  • Financial penalties to farmer (premium for low and penalty for high)
  • EU legislation
  • Suitability for processing and storage
  • Milk yield drops by 2.5% for every increase in SCC to 100,000
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5
Q

What are the factors that affect SCC?

A
  • Clinical and subclinical mastitis
  • Testing method
  • AGe of cow
  • Stage of lactation
  • Seasonal and diurnal variation
  • Milking frequency
  • Stress and management
  • Trauma to udder
  • Genetics
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6
Q

Define bactoscan.

A

Measurement of the total number of bacteria in the milk

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7
Q

Why is bactoscan important?

A
  • Financial penalties to farmer (premium for low, penalty for high)
  • Suitability for processing
  • Reduction in shelf life
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8
Q

What are the sources of bacteria in milk?

A
  • Mastitis pathogens from the udder
  • Environmental contamination
  • Diry milking plant
  • Poor refrigeration of milk
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9
Q

Describe aseptic milk sampling technique.

A

Minimise contamination from commensal and environmental bacteria

  1. Wear gloves
  2. Clean teat end
  3. Foremilk
  4. Collect sample
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10
Q

Describe best practice for sending samples to the lab.

A

Store at 4C until transported

Freezing of samples and send batch to lab

  • May reduce quantity of gram neg bacteria
  • Reduces costs
  • Storage of samples until problem arises
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11
Q

What is the benefit of PCR testing of milk samples rather than sending them to a lab for bacteriology?

A

PCR detects presence of bacterial DNA in milk samples

  • No need to take samples aseptically
  • Uses preservative tablets, so no need to keep cold for transport to lab
  • More sensitive for picking up bacteria
  • More difficult to interpret and more expensive
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12
Q

Why is it important to treat cows with mastitis?

A
  • Cow welfare
  • Reduce recurrence and transmission
  • Spontaneous cure rates for subclinical mastitis
  • Economic if prevents culling of cows
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13
Q

How do you treat Grade 1 mastitis?

A

Intramammary antibiotic tubes alone

Herd Health Plan needs to state:

  • Product to be used
  • Length of treatment
  • Milk withholding time
  • Sampling for bacteriology
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14
Q

What is the price of an antibiotic failure penalty?

A

Antibiotic failure penalty = 1ppl for all milk

It is on YOU to tell the farmer the withholding time

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15
Q

What are the reasons for the failure of antibiotic therapy?

A
  • Dealy in detection and initiation of treatment
  • Establishment of chronic infections
  • Constant reinfection
  • Inappropriate antibiotic usage
  • Duration of treatment too short
  • Mastitis caused by organisms non-responsive to antibiotics
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16
Q

How do you treat Grade 2 mastitis?

A

Intramammary antibiotic tubes

Parentral antibiotic therapy

±NSAID therapy

17
Q

What are some good clinical signs of coliform mastitis?

A

Hard, hot swollen quarter

Serum-coloured watery secretions

18
Q

How do you treat coliform mastitis?

A

Fluid therapy to correct the circulating blood volume to increase cardiac output and increase tissue perfusion

  • Use:
    • Oral fluids
    • 10-15L IV isotonic fluids
    • 3L saline then 40L water orally

NSAIDS to counteract the effects of endotoxaemia, reduce pain (improve welfare), improve demeanour, reduce pyrexia

Antibiotics against involvement of other pathogen/secondary bacteria, prevent bacteraemia,

  • Use broadspectrum

Quarter stripping and oxytocin to remove inflammatory products from the udder

Other supportive therapy: IV Calcium borogluconate, Multivitamin injections, IV glucose/dextrose

TLC