VETM3460 Therio C33 FOP Equine Foster Presentationvetrepropath.com/DVM/VETM3460 Therio C33 FOP...
Transcript of VETM3460 Therio C33 FOP Equine Foster Presentationvetrepropath.com/DVM/VETM3460 Therio C33 FOP...
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Pregnancy Failure
Equine
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The Mare
many ‘nonlesion’ lesions no placental reserve ‘loose’ cervix
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Normal uterus
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Postpartum uterus
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Pregnant uterus
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Equine placenta
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Allantoic surface
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Expectations - Kentucky
No diagnosis 16 Noninfectious 47
Dystocia/trauma 19 congenital defects 10 placental edema 7 twins 6 cord abnormality 3 body pregnancy 2
Infectious 37 Bacteria 18 Placentitis 10 EHV 4 Leptospirosis 2 Fungal 2 Nocardia 1
Giles et at 1993, Causes of abortion, stillbirth and perinatal death in horses. 3,527 cases. JAVMA 203: 1170-1175
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch insertion of cord
Allantoic pouches Yolk sac remnant Hippomane
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Postpartum cervical star
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch Insertion of cord
Allantoic pouches Yolk sac remnant Hippomane
Endometrial cups
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch Insertion of cord
Allantoic pouches Yolk sac remnant Hippomane
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch insertion of cord
Allantoic pouches Yolk sac remnant Hippomane
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch chorionic fold
Allantoic pouches Yolk sac remnant Hippomane
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Nonlesion lesions
Avillous regions cervical star chorioallantoic pouch chorionic fold
Allantoic pouches Yolk sac remnant Hippomane
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Fetal lesions
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Abnormalities
Fetus Dystocia Congenital anomalies Thyroid hyperplasia and musculoskeletal disease Lesions of Equine Herpesvirus (EHV)
fibrin cast in trachea interstitial pneumonia focal necrosis on liver prominent lymphoid follicles in spleen
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Fetal Abnormalities
Fetus Dystocia Congenital anomalies Musculoskeletal disease and Thyroid hyperplasia Lesions of Equine alphaherpesvirus 1 (EHV-1)
fibrin cast in trachea interstitial pneumonia focal necrosis on liver prominent lymphoid follicles in spleen
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Congenital abnormalities
Schistosomus reflexus
Schism – divisionSoma – body
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Abnormalities
Fetus Dystocia Congenital anomalies Musculoskeletal Disease and Thyroid Hyperplasia Lesions of Equid alphaherpesvirus 1 (EHV-1)
fibrin cast in trachea interstitial pneumonia focal necrosis on liver prominent lymphoid follicles in spleen
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Musculoskeletal disease and thyroid hyperplasia
Variety of skeletal abnormalites Limb deformities Arthrogryposis Osteopetrosis
Microscopic hyperplasia Poor feeds nitrite/nitrate
Arthros – joint, gryposis – abnormal curvature, Osteo – bone, petros - rock
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Abnormalities
Fetus Dystocia Congenital anomalies Musculoskeletal disease and thyroid hyperplasia Equid alphaherpesvirus 1 (EHV)
fibrin cast in trachea interstitial pneumonia focal necrosis on liver prominent lymphoid follicles in spleen
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Equid alphaherpesvirus 1
Interstitial pneumonia
Focal hepatic necrosis
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Equid alphaherpesvirus 1
Fibrin cast in trachea
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Equid alphaherpesvirus 1 (EHV-1)
Focal hepatic necrosis
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Placental abnormalities
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Cord Abnormalities
too short <36 cm too long >83 cm
placental infarct torsion strangulation
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Cord abnormalities - torsion
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Reduced placental reserve – Avillusregions
Avillus regions twinning premature separation body pregnancy
Placentitis Ascending infection
Twinning
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Reduced placental reserve – avillusregions
Avillus regions twins premature separation body pregnancy
Placentitis Ascending infection
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Reduced placental reserve - Placentitis
Avillus regions twins premature separation body pregnancy
Placentitis Ascending infection Streptococcus zooepidemicus
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Regionally important
Fescue endophyte mycotoxicosis Neotyphodium coenophialum Kentucky and southern Ontario! Ergot alkaloids (vasoactive and prolactin) Hyperthermia Placental edema and thickening Dysmaturity Prolonged gestation
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Endophyte toxicosis
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‘Mare Reproductive Loss Syndrome’ and ‘Equine Amnionitis and fetal loss’
2001 and 2002 foaling season Early fetal loss (>day 40) – about day 80 Peak about May 7th Link to Processionary Caterpillars
Eastern Tent Caterpillar (exoskeleton) Increased evidence of fetal sepsis and ‘amnionitis’.
Hairs (setae) penetrate intestine, uterus and placenta –endotoxemia/bacteremia
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Kentucky
No diagnosis 16 Noninfectious 47
Dystocia/trauma 19 congenital defects 10 placental edema 7 twins 6 cord abnormality 3 body pregnancy 2
Infectious 37 Bacteria 18 Placentitis 10 EHV-1 4 Leptospirosis 2 Fungal 2 Nocardia 1
Giles et al. Causes of abortion, stillbirth and perinatal death in horses. 3,527 cases. JAVMA 1993; 203: 1170-1175