Document Detail

Acute hemorrhagic pulmonary infarction and necrotizing pneumonia in horses: 21 cases (1967-1993).
MedLine Citation:
PMID:  9187729     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To characterize history, clinical signs, and pathologic findings in horses with histologically confirmed acute hemorrhagic pulmonary infarction and necrotizing pneumonia. DESIGN: Retrospective study. ANIMALS: 21 horses. RESULTS: 19 of the 21 horses were Thoroughbred racehorses in training. Eighteen horses had had strenuous exercise immediately prior to onset of illness. Fifteen horses had a serosanguineous nasal discharge during hospitalization. Seventeen horses had radiographic evidence of pulmonary consolidation and pleural effusion. Nine of 14 horses had ultrasonographic evidence of large pulmonary parenchymal defects consistent with consolidation. Pleurocentesis yielded a suppurative, serosanguineous effusion in the 14 horses in which it was performed. Bacteria were isolated from all transtracheal aspirates (14) and from 6 of 12 pleural fluid samples. Actinobacillus suis-like organisms and Streptococcus equi subsp zooepidemicus were most commonly isolated. Nineteen horses were hospitalized and treated. Mean duration of treatment was 5 days, and most horses were euthanatized because of secondary complications, continued costs of medical treatment, or poor prognosis for future performance. Pathologic lesions included well-demarcated regions of hemorrhagic pulmonary infarction with necrosis and a serosanguineous pleural effusion. Thrombosis of pulmonary vessels was found in 11 horses. CLINICAL IMPLICATIONS: An acute or peracute onset of severe respiratory distress, with serosanguineous nasal discharge, ultrasonographic and radiographic evidence of severe pulmonary consolidation, and serosanguineous suppurative pleural effusion, is strongly suggestive of pulmonary infarction in horses. Horses with pulmonary infarction responded poorly to conventional treatment for pleuropneumonia and had a poor prognosis for recovery.
E A Carr; G P Carlson; W D Wilson; D H Read
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Publication Detail:
Type:  Case Reports; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  210     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  1997 Jun 
Date Detail:
Created Date:  1997-10-15     Completed Date:  1997-10-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1774-8     Citation Subset:  IM    
Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis 95616, USA.
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MeSH Terms
Actinobacillus / isolation & purification
Actinobacillus Infections / diagnosis,  pathology,  veterinary
Acute Disease
Hemorrhage / diagnosis,  pathology,  veterinary*
Horse Diseases / diagnosis,  pathology*,  physiopathology
Lung / microbiology,  pathology,  radiography
Physical Conditioning, Animal / physiology
Pleural Effusion / microbiology,  pathology,  veterinary
Pleuropneumonia / microbiology,  pathology,  veterinary*
Pneumonia, Bacterial / epidemiology,  pathology,  veterinary
Pulmonary Embolism / diagnosis,  pathology,  veterinary*
Retrospective Studies
Streptococcal Infections / diagnosis,  pathology,  veterinary
Streptococcus equi / isolation & purification

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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