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Finals Farm > Cattle Abortion: Bacteria > Flashcards

Cattle Abortion: Bacteria Flashcards

(57 cards)

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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

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A

Antibody detection in blood
Fat of fetus for antigen

24
Q

Leptospira hardjo: abortion rate

25
Leptospira hardjo: abortion time
6+ months
26
Leptospira hardjo: placenta findings
Avascular Atonic yellow-brown cotyledons Brown gelatinous oedema between allantois and amnion
27
Leptospira hardjo: fetal findings
Fetal death is common
28
Leptospira hardjo: treatment and control
Vaccination - prevent urine shedding and protect against milk drop/abortion Streptomycin for new stock and can treat AI tubes
29
Arcanobacter pyogenes: clinical signs
Abortion Illness and mastitis/endometritis
30
Arcanobacter pyogenes: abortion rate
Sporadic or multiple
31
Arcanobacter pyogenes: abortion time
6+ months
32
Arcanobacter pyogenes: placental findings
Suppurative placentitis
33
Arcanobacter pyogenes: fetal findings
Fetal pneumonia Detected only on histopathology
34
Salmonella: clinical signs
Abortion Often no other dam clinical signs (fever, lethargy, milk drop, bloody D+) Death in 75% affected animals
35
Salmonella: transmission
Faecal infection Don’t feed infected milk to calves Disinfect calving boxes
36
Salmonella: abortion rate
Sporadic Possible herd outbreak
37
Salmonella: time of abortion
Anytime 6-9 months
38
Salmonella: placenta findings
No specific lesions
39
Salmonella: fetal findings
2-6 wk old calves Slow to develop so seen in older calves
40
Coxiella burnetti: clinical signs
Usually subclinical Abortion Anorexia
41
Coxiella burnetti: transmission
Shed in milk, urine, faeces and uterine fluids
42
Coxiella burnetti: abortion rate
Sporadic
43
Coxiella burnetti: placenta findings
Necrotising placentitis Subclinical mastitis
44
Listeria monocytogenes: clinical signs
Abortion Depression, anorexia, fever, ataxia, salivation
45
Listeria monocytogenes: transmission
Shed in faeces, milk, uterine discharge Via ingestion or infected soil, inhaled or direct contact
46
Listeria monocytogenes: diagnosis
Culture from aborted material
47
Listeria monocytogenes: prevention
Feed good quality silage, rodent control
48
Listeria monocytogenes: abortion rate
Sporadic Rarely abortion storms
49
Listeria monocytogenes: time of abortion
Late Towards end of gestation
50
Listeria monocytogenes: placenta findings
Placentitis Multiple yellow or grey necrotic foci in cotyledons
51
Listeria monocytogenes: fetal findings
Multiple yellow or grey necrotic foci in the liver
52
Bacillus licheniformis: clinical signs
Late abortions Live calves and placental lesions
53
Bacillus licheniformis: transmission
Dirty water troughs and spoiled silage
54
Bacillus licheniformis: abortion rate
Sporadic
55
Bacillus licheniformis: time of abortion
Late 5+ months
56
Bacillus licheniformis: placental findings
Placentitis Dry yellow-brown allantochorion Oedema of allantochorion around cotyledons, appears like vesicles Haemorrhagic and necrotic cotyledons
57
Bacillus licheniformis: fetal findings
May be fibrinous pleurisy, pericarditis and peritonitis

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