Clinical and clinicopathological factors associated with survival in 44 horses with equine neorickettsiosis (potomac horse fever)

Bertin, F. R., Reising, A., Slovis, N. M., Constable, P. D. and Taylor, S. D. (2013) Clinical and clinicopathological factors associated with survival in 44 horses with equine neorickettsiosis (potomac horse fever). Journal of Veterinary Internal Medicine, 27 6: 1528-1534. doi:10.1111/jvim.12209


Author Bertin, F. R.
Reising, A.
Slovis, N. M.
Constable, P. D.
Taylor, S. D.
Title Clinical and clinicopathological factors associated with survival in 44 horses with equine neorickettsiosis (potomac horse fever)
Journal name Journal of Veterinary Internal Medicine   Check publisher's open access policy
ISSN 0891-6640
1939-1676
Publication date 2013-11-01
Year available 2013
Sub-type Article (original research)
DOI 10.1111/jvim.12209
Open Access Status DOI
Volume 27
Issue 6
Start page 1528
End page 1534
Total pages 7
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Subject 3400 Veterinary
Formatted abstract
Background: The epidemiology of equine neorickettsiosis (EN) has been extensively studied but limited clinical and clinicopathological data are available concerning naturally infected horses.
Hypothesis: Factors predictive of survival will be identified in horses diagnosed with EN.
Animals: Convenience sample of 44 horses with EN admitted to 2 referral institutions.
Methods: A retrospective study was performed. A diagnosis of EN was based on the presence of positive blood or fecal PCR. Results: The most common clinical signs included diarrhea (66%), fever (50%), anorexia (45%), depression (39%), colic (39%), and lameness (18%). The median duration of hospitalization was 6 days and 73% of horses survived to discharge. Laminitis was present in 36% of horses, 88% of which were affected in all 4 feet. Serum creatinine and urea nitrogen concentrations, as well as RBC count, blood hemoglobin concentration, hematocrit, band neutrophils, serum AST activity, serum CK activity, and anion gap, were significantly (P < .05) higher in nonsurvivors. Serum chloride and sodium, concentrations as well as duration of hospitalization were significantly lower in nonsurvivors. The results of forward stepwise logistic regression indicated that blood hemoglobin concentration on admission and antimicrobial treatment with oxytetracycline were independent factors associated with survival.
Conclusions and Clinical Importance: Severity of colitis as reflected by electrolyte loss, hemoconcentration, and prerenal azotemia were predictors of survival in horses diagnosed with EN. Treatment with oxytetracycline was associated with increased survival.
Keyword Colitis
Ehrlichiosis
Equine
Oxytetracycline
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Veterinary Science Publications
 
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Created: Wed, 16 Nov 2016, 20:59:01 EST by Francois-rene Bertin on behalf of Learning and Research Services (UQ Library)