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Cerebral Edema l: Introduction

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Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...

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Cytotoxic Edema: Pathophysiology

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Bovine Mammary Gland Biopsy Techniques

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Published on: December 23, 2018

Malignant edema in postpartum dairy cattle.

Jenee S Odani¹, Patricia C Blanchard, John M Adaska

¹California Animal Health and Food Safety Laboratory System, University of California Davis, San Bernardino, CA 92408, USA.

Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc

|November 11, 2009

Summary

Clostridium septicum caused malignant edema in five postparturient Holstein cattle. Diagnosis involved bacterial culture and fluorescent antibody testing, revealing severe tissue damage and edema post-calving.

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Area of Science:

Veterinary Medicine
Bacteriology
Animal Pathology

Background:

Postparturient vulvovaginitis and metritis can occur in cattle.
Clostridium septicum is a known cause of malignant edema.

Purpose of the Study:

To describe five cases of vulvovaginitis and metritis in cattle caused by Clostridium septicum.
To detail the clinical signs, gross and microscopic findings, and diagnostic methods used.

Main Methods:

Case report describing five Holstein cattle with postparturient infections.
Diagnosis confirmed by bacterial culture and fluorescent antibody testing for Clostridium septicum.
Gross and microscopic examination of affected tissues.

Main Results:

All five cases were attributed to Clostridium septicum infection.
Clinical signs included perineal/perivulvar swelling, fever, and depression within 1-3 days postpartum.
Gross findings revealed extensive gelatinous, hemorrhagic edema and longitudinal tears in the reproductive tract.
Microscopic examination showed necrotic and ulcerated mucosae with Gram-positive rods consistent with C. septicum.

Conclusions:

Clostridium septicum is a causative agent of malignant edema in postparturient cattle.
Parturition trauma appears to predispose cattle to this condition.
Prompt diagnosis and identification of C. septicum are crucial for understanding and managing these cases.