Lecture 5: Introduction to herd Health Flashcards

1
Q

What is herd health management

A

Practice in which methods are used to optimize health, welfare and production in a population

  • treat sick animal with a big picture perspective
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2
Q

What are 2 preventative measures that can be taken to promote herd health

A
  1. Good nutrition
  2. Clean environment
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3
Q

What are two basic strategies to promote herd health

A
  1. Biosecurity
  2. Biocontainment
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4
Q

What is biosecurity

A

Exclude and prevent disease from entering

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5
Q

What is biocontainment

A

Control or eliminate disease that is already present

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6
Q

What is ideal biosecurity

A

Close herd

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7
Q

A closed herd does not have what 7 things

A
  1. No purchasing new livestock
  2. No co-mingling stock
  3. No wildlife exposure
  4. No neighbors with livestock
  5. No bad fences
  6. Don’t use commercial livestock haulers
  7. Don’t go to livestock fairs or shows
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8
Q

What can you tell by looking at this cows nose

A

Not feeling well, healthy cows keep noses clean

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9
Q

Case example: 5-7 month old heifers experiencing anorexia, depression, conjunctivitis, fever, nasal discharge, nasal plaques, dry cough, hyperemic noses. What is a common respiratory disease of cattle that is a potential differential here

A

Infectious bovine rhinotracheitis

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10
Q

How do you confirm infectious bovine rhinotracheitis dx

A

PCR on nasal swabs

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11
Q

What are the 5 big respiratory viruses in cattle

A
  1. Bovine herpes virus 1 (aka IBR)
  2. Bovine respiratory syncytial virus (BRSV)
  3. Parainfluenza 3 virus (PI3)
  4. Bovine coronavirus
  5. Bovine viral diarrhea virus (BVDV)
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12
Q

What are the 3 major factors that can contribute to the development of bovine respiratory disease complex

A
  1. Virus
  2. Stress
    3 secondary bacterial infections
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13
Q

What are the 3 general categories of beef cattle production groups

A
  1. Cow/calf farms
  2. Backgrounding or stocker
  3. Finishing
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14
Q

What happens at backgrounding or stocker beef cattle farms

A

After calves are weaned they will continue to graze on pasture and may receive supplemental feed to help it grow and mature

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15
Q

What happens at finishing beef cattle productions

A

Cattle will feed on roughage and grain in order to meet nutritional requirements. Cattle may be finished on grass or grain. After 4-6 months when market weight is met they are ready for harvest

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16
Q

Describe the basic dairy production groups

A
  1. Birth—> 3 months kept in calving hutches
  2. Animal from 3–> 26 months, begin breeding them
  3. Milk production- first calving at 37 months
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17
Q

When do dairy cattle usually have their first calf

A

37 months

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18
Q

What is mastitis

A

Inflammation of mammary gland as a result of intramammary infection

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19
Q

What is cow related mastitis

A

Bacteria are found in the udder and sometimes on the cow itself

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20
Q

How would you manage cow related mastitis

A
  1. Make sure hands of milker are clean
  2. Use udder clothes
  3. Clean and functioning milk machine
  4. Teat disinfection
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21
Q

What is environment related mastitis

A

Bacteria grow and multiply in the environment of the cow

22
Q

How do you manage environment related mastitis

A
  1. Good environmental hygiene
  2. Teat disinfection
23
Q

What is subclinical mastitis

A

Cows are producing milk, looks normal but decrease production, so economic loss

24
Q

What is clinical mastitis

A

Abnormal milk production

25
Q

How do you diagnose subclinical mastitis

A
  1. California mastitis test
  2. Milk culture
26
Q

Case example: milk culture came back with S. Aureus (contagious mastitis) what production areas can we look at to control the spread

A
  1. Hands of milker
  2. Are they using an udder cloth
  3. Functioning and clean milk machine
  4. Disinfect teat
27
Q

Case example: flock exam of sheep who are quiet, fecal staining, low BCS, bottle jaw and FAMACHA score 4-5. What are some potential differentials

A

Parasites, specifically haemonchus contortus causing anemia

28
Q

Who do we treat on FAMACHA card

A

Don’t usually treat scores 1-2, will treat 3-5 or euthanize

29
Q

What type of parasite is haemonchus contortus

A

Strongyle

30
Q

What can we do to the grass to control the spread of H. Contortus

A

Keep grass short, as L3 (infective stage) climb up onto the tips of grass and then are ingested by host

31
Q

What are the core vaccines in cattle

A
  1. Infectious bovine rhinotracheitis
  2. Bovine viral diarrhea virus
  3. Parainfluenza virus
  4. Bovine respiratory syncytial virus
  5. Clostridial vaccines
32
Q

What are the core vaccines for sheep and camelids

A

CD and T (C. perfringens type C and D and tetanus toxoid)

33
Q

What is a noncore vaccine for sheep and camelids

A

Rabies

34
Q

What are the common vaccines for production pigs

A
  1. Erysipelas
  2. Leptospirosis
  3. Parvovirus
  4. Colibacillosis

*varies from farm to farm

35
Q

What are the core vaccines in potbellied pigs

A

Erysipelas and CD and T

36
Q

What are magnets used for

A

Prevent hardware disease so we don’t rupture reticulum and through diaphragm to cause endocarditis

37
Q

What tags are used in brucellosis vaccination

A

Orange tags

38
Q

Is brucellosis vaccine modified live or killed

A

Modified live

39
Q

Who receives brucellosis vaccine

A

Heifers between 4-12 months old

40
Q

Why is it important to vaccinate cattle for brucellosis at young age between 4-12 months

A

It can cause abortion since it is a modified live vaccine

41
Q

T or F: brucellosis vaccine is administered to males and females

A

False, not males will cause orchitis

42
Q

Who is allowed to perform TB test

A

USDA accredited veterinarian

43
Q

What is TB testing important for

A

Movement, milk quality assurance programs

44
Q

How do you perform TB test

A
  1. Inject purified protein derivative tuberculin
  2. Using 1mL syringe and 25 g needle
  3. Administer 01.mL in caudal tail fold
45
Q

What do you do if you get reaction to TB test (swelling)

A

Suspect animal, call state vet

46
Q

What are some examples of reportable diseases in cattle

A
  1. Foot and mouth disease
  2. Tuberculosis
  3. Scarpie
  4. Mad cow
47
Q

What are the 3 landmarks for SQ, IV and IM injections

A
  1. Jugular furrow
  2. Cranial aspect of scapula/shoulder
  3. Spinal column
48
Q

Why do we do injections in the neck

A

Meat quality assurance, no valuable cut of meat in the neck

do not do any injections anywhere else in body

49
Q

Where do you do IM and SQ injections in camelids and small ruminants

A

SQ: right in front of shoulder or axilla
IM: neck and tricep area

50
Q

Where do you not want to put an injection in the hind end for small ruminants, camelids and pigs

A

Hamstrings, near sciatic nerve