Pregnancy Failure Bovine specific Diagnostic Approach Discussion - - PowerPoint PPT Presentation

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Aug 07, 2023 346 likes •609 views

Pregnancy Failure Bovine specific Diagnostic Approach Discussion with owner Is there a problem? What you can achieve - Success rate What will you do about it Zoonosis History Quarantine Zoonosis Examine Dam Fetus

SLIDE 1

Pregnancy Failure

Bovine specific

SLIDE 2

Diagnostic Approach

Discussion with owner

 Is there a problem?  What you can achieve - Success rate  What will you do about it  Zoonosis

History Quarantine Zoonosis Examine

 Dam  Fetus  Placenta

Look for

 Infectious and Noninfectious causes  Lesions  Common diseases

SLIDE 3

The Cow

Mostly you will not get a diagnosis from sporadic cases, especially stillbirths Bovine placenta has much reserve.

 Adventitial placentation

Infectious causes are the important ones - microbiological/histological diagnosis Marked regional differences in agent.

SLIDE 4

Bovine (Beef) FOP

Embryonic mortality

 10%

Abortion

 1.6%

Stillbirth

 2.6%

Perinatal mortality

 4%

SLIDE 5

Bovine Abortion

No diagnosis 58 Noninfectious 1 Infectious 42

 Bacterial

17

 Protozoal

16

 Viral

4

 Fungal

4

 Ureaplasma

2

SLIDE 6

Fetal lesions

SLIDE 7

Fetal lesions

Dermatitis

 Mycotic

Heart failure Focal necrosis in liver

SLIDE 8

Fetal lesions

Dermatitis

 mycotic

Heart failure

 Pestivirus A, B (BVDV)  Neospora  Vit E / Selenium

Focal necrosis in liver

SLIDE 9

Fetal lesions

Dermatitis



mycotic

Heart failure



Pestivirus A, B (BVDV)



Neospora



Vit E / Selenium

Focal necrosis in liver

 Herpesvirus (Bovine alphaherpesvirus – 1; BoHV)  Listeria

SLIDE 10

Placental lesions

SLIDE 11

Normal uterus

SLIDE 12

Normal uterus

SLIDE 13

Normal Chorionic surface

SLIDE 14

Placental mineralization

SLIDE 15

Adventitial placentation

SLIDE 16

Adventitial placentation

SLIDE 17

Hippomane

SLIDE 18

Placentitis

SLIDE 19

Placentitis

SLIDE 20

Placentitis

edema exudate necrosis of cotyledon thickening of intercotyledonary placenta cupping of cotyledon

SLIDE 21

Amniotic plaques are normal

SLIDE 22

Amnionitis

Ureaplasma Rarely

 Mycotic  bacterial

SLIDE 23

Common abortogenic agents

Bacteria

 Placentitis  Bacillus licheniformis  Trueperella pyogenes

Fungi

 Placentitis  Aspergillus fumigatus

Protozoal

 Encephalitis, myocarditis  Neospora caninum

SLIDE 24

Common abortogenic agents

Viral

 Pestivirus A, B (Bovine Viral Diarrhea [BVD] virus)

 Underdiagnosed – no lesions or virus isolation

 Bovine alphaherpesvirus 1 (BoHV-1)

Mycoplasma/Ureaplasma

 Ureaplasma diversum  Amnionitis, placentitis

SLIDE 25

Regionally important

Bacteria

 Brucella abortus (the original epizootic bovine abortion)  Campylobacter fetus  Coxiella burnetii

Protozoal

 Tritrichomonas foetus

Viral

 Bluetongue virus

Other

 Pine needle abortion (aka ponderosa pine abortion)  Pajaroellobacter abortibovis (Foothills abortion; ‘epizootic bovine abortion’) -

Pajaroello (pa ha hell o) tick borne disease of Ca, Ne, Or)