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Finals Farm > Cattle Abortion: Bacteria > Flashcards

Cattle Abortion: Bacteria Flashcards

1
Q

Trueperella pyogenes (Actinomyces pyogenes): Clinical Features

A

Mother not ill
URT, forms abscesses

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2
Q

Trueperella pyogenes (Actinomyces pyogenes): Abortion rate

A

Sporadic
Any ages

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3
Q

Trueperella pyogenes (Actinomyces pyogenes): Placenta findings

A

Endometritis
Placentitis

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4
Q

Trueperella pyogenes (Actinomyces pyogenes): Fetal findings

A

Fetus autolysed with fibrinous pericarditis, peritonitis or pleuritis

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5
Q

What is essential to remember about Brucella abortus?

A

Noticiable
Brucellosis order

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6
Q

Brucella abortus: Clinical signs

A

Abortion, birth of weak/dead calves, retained placenta, infertility

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7
Q

Brucella abortus: transmission

A

Bacteria shed in milk and uterine discharge
Ingestion

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8
Q

Brucella abortus: treatment and control

A

No treatment
Test and cull
Vaccine of calves increases resistance

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9
Q

Brucella abortus: abortion rate

A

Up to 90% in susceptible herds

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10
Q

Brucella abortus: time of abortion

A

6+ months

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11
Q

Brucella abortus: placenta findings

A

Necrosis of cotyledons
Leathery, opaque placenta and oedema

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12
Q

Brucella abortus: fetal findings

A

Pneumonia?
Only detected on histopathology

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13
Q

Campylobacter fetus: clinical signs

A

Abortion

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14
Q

Campylobacter fetus: transmission

A

Cows often resistant after first abortion
Venereal pathogens - bulls (main source)
Ingestion and haematogenous spread to placenta

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15
Q

Campylobacter fetus: control

A

Vaccination

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16
Q

Campylobacter fetus: investigation

A

Examination of abomasal content or culture of placenta

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17
Q

Campylobacter fetus: abortion rate

A

Sporadic

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18
Q

Campylobacter fetus: time of abortion

A

4-8 months

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19
Q

Campylobacter fetus: placenta findings

A

Mild placentitis

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20
Q

Campylobacter fetus: fetal findings

A

Mild fibrinous pleurisy and peritonitis
Bronchopneumonia

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21
Q

Leptospira hardjo: clinical signs

A

Flu like symptoms
Infertility
Poor milk yield
Flabby udder
Most systemically fine

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22
Q

Leptospira hardjo: transmission

A

Contact with urine and abortion products
Water contamination.

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23
Q

Leptospira hardjo: diagnosis

A

Antibody detection in blood
Fat of fetus for antigen

24
Q

Leptospira hardjo: abortion rate

A

Up to 30%

25
Q

Leptospira hardjo: abortion time

A

6+ months

26
Q

Leptospira hardjo: placenta findings

A

Avascular
Atonic yellow-brown cotyledons
Brown gelatinous oedema between allantois and amnion

27
Q

Leptospira hardjo: fetal findings

A

Fetal death is common

28
Q

Leptospira hardjo: treatment and control

A

Vaccination - prevent urine shedding and protect against milk drop/abortion
Streptomycin for new stock and can treat AI tubes

29
Q

Arcanobacter pyogenes: clinical signs

A

Abortion
Illness and mastitis/endometritis

30
Q

Arcanobacter pyogenes: abortion rate

A

Sporadic or multiple

31
Q

Arcanobacter pyogenes: abortion time

A

6+ months

32
Q

Arcanobacter pyogenes: placental findings

A

Suppurative placentitis

33
Q

Arcanobacter pyogenes: fetal findings

A

Fetal pneumonia
Detected only on histopathology

34
Q

Salmonella: clinical signs

A

Abortion
Often no other dam clinical signs (fever, lethargy, milk drop, bloody D+)
Death in 75% affected animals

35
Q

Salmonella: transmission

A

Faecal infection
Don’t feed infected milk to calves
Disinfect calving boxes

36
Q

Salmonella: abortion rate

A

Sporadic
Possible herd outbreak

37
Q

Salmonella: time of abortion

A

Anytime
6-9 months

38
Q

Salmonella: placenta findings

A

No specific lesions

39
Q

Salmonella: fetal findings

A

2-6 wk old calves
Slow to develop so seen in older calves

40
Q

Coxiella burnetti: clinical signs

A

Usually subclinical
Abortion
Anorexia

41
Q

Coxiella burnetti: transmission

A

Shed in milk, urine, faeces and uterine fluids

42
Q

Coxiella burnetti: abortion rate

A

Sporadic

43
Q

Coxiella burnetti: placenta findings

A

Necrotising placentitis
Subclinical mastitis

44
Q

Listeria monocytogenes: clinical signs

A

Abortion
Depression, anorexia, fever, ataxia, salivation

45
Q

Listeria monocytogenes: transmission

A

Shed in faeces, milk, uterine discharge
Via ingestion or infected soil, inhaled or direct contact

46
Q

Listeria monocytogenes: diagnosis

A

Culture from aborted material

47
Q

Listeria monocytogenes: prevention

A

Feed good quality silage, rodent control

48
Q

Listeria monocytogenes: abortion rate

A

Sporadic
Rarely abortion storms

49
Q

Listeria monocytogenes: time of abortion

A

Late
Towards end of gestation

50
Q

Listeria monocytogenes: placenta findings

A

Placentitis
Multiple yellow or grey necrotic foci in cotyledons

51
Q

Listeria monocytogenes: fetal findings

A

Multiple yellow or grey necrotic foci in the liver

52
Q

Bacillus licheniformis: clinical signs

A

Late abortions
Live calves and placental lesions

53
Q

Bacillus licheniformis: transmission

A

Dirty water troughs and spoiled silage

54
Q

Bacillus licheniformis: abortion rate

A

Sporadic

55
Q

Bacillus licheniformis: time of abortion

A

Late 5+ months

56
Q

Bacillus licheniformis: placental findings

A

Placentitis
Dry yellow-brown allantochorion
Oedema of allantochorion around cotyledons, appears like vesicles
Haemorrhagic and necrotic cotyledons

57
Q

Bacillus licheniformis: fetal findings

A

May be fibrinous pleurisy, pericarditis and peritonitis

Finals Farm (5 decks)

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